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<?xml version="1.0" ?><feed xmlns="http://www.w3.org/2005/Atom" xmlns:g="http://base.google.com/ns/1.0"> <title>LEAP: Little Electronic and Arduino Projects</title> <subtitle>my collection of electronics projects, many involving an Arduino in one way or another</subtitle> <link href="https://leap.tardate.com/catalog/atom.xml" rel="self"/> <link href="https://leap.tardate.com/"/> <id>https://leap.tardate.com/</id> <icon>https://leap.tardate.com/catalog/assets/images/favicon-32x32.png</icon> <logo>https://leap.tardate.com/catalog/assets/images/favicon-32x32.png</logo> <updated>2025-04-16T15:28:00Z</updated> <author> <name>Paul Gallagher</name> <email>gallagher.paul@gmail.com</email> <uri>https://github.com/tardate</uri> </author> <entry> <id>https://leap.tardate.com/playground/unor3base/</id> <link href="https://leap.tardate.com/playground/unor3base/"/> <g:image_link>https://leap.tardate.com/playground/unor3base/assets/unor3base_build.jpg</g:image_link> <updated>2025-04-16T15:28:00Z</updated> <title>#770 Uno R3 Base</title> <summary>Testing various printed bases and cases for the classic Arduino Uno.</summary> <content type="html"><div><p>Testing various printed bases and cases for the classic Arduino Uno.</p><img src="https://leap.tardate.com/playground/unor3base/assets/unor3base_build.jpg" /></div></content> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/equipment/lowcurrentreferencediy/</id> <link href="https://leap.tardate.com/equipment/lowcurrentreferencediy/"/> <g:image_link>https://leap.tardate.com/equipment/lowcurrentreferencediy/assets/lowcurrentreferencediy_build.jpg</g:image_link> <updated>2025-04-11T15:35:00Z</updated> <title>#769 Low Current Reference</title> <summary>Building a low current reference switchable between 100μA, 200μA, 300μA and 400μA, based on a design from Louis Scully / Scullcom Hobby Electronics using the REF200 current reference and a laser-cut MDF project case.</summary> <content type="html"><div><p>Building a low current reference switchable between 100μA, 200μA, 300μA and 400μA, based on a design from Louis Scully / Scullcom Hobby Electronics using the REF200 current reference and a laser-cut MDF project case.</p><img src="https://leap.tardate.com/equipment/lowcurrentreferencediy/assets/lowcurrentreferencediy_build.jpg" /></div></content> <category term="Tools"/> <category term="Test Equipment"/> <category term="Current Reference"/> <category term="REF200"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ref200/currentsource50ua/</id> <link href="https://leap.tardate.com/electronics101/ref200/currentsource50ua/"/> <g:image_link>https://leap.tardate.com/electronics101/ref200/currentsource50ua/assets/currentsource50ua_build.jpg</g:image_link> <updated>2025-04-10T05:25:00Z</updated> <title>#768 50 µA Current Source</title> <summary>Testing the REF200 as a 50µA current source.</summary> <content type="html"><div><p>Testing the REF200 as a 50µA current source.</p><img src="https://leap.tardate.com/electronics101/ref200/currentsource50ua/assets/currentsource50ua_build.jpg" /></div></content> <category term="Current Reference"/> <category term="REF200"/> </entry> <entry> <id>https://leap.tardate.com/equipment/nanovna/</id> <link href="https://leap.tardate.com/equipment/nanovna/"/> <g:image_link>https://leap.tardate.com/equipment/nanovna/assets/nanovna_build.jpg</g:image_link> <updated>2025-04-06T09:10:00Z</updated> <title>#767 NanoVNA</title> <summary>Unpacking and doing some basic tests with the NanoVNA, including using the NanoVNASaver software on macOS.</summary> <content type="html"><div><p>Unpacking and doing some basic tests with the NanoVNA, including using the NanoVNASaver software on macOS.</p><img src="https://leap.tardate.com/equipment/nanovna/assets/nanovna_build.jpg" /></div></content> <category term="Tools"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/dicksonchargepump/onepinthreev/</id> <link href="https://leap.tardate.com/electronics101/power/dicksonchargepump/onepinthreev/"/> <g:image_link>https://leap.tardate.com/electronics101/power/dicksonchargepump/onepinthreev/assets/onepinthreev_build.jpg</g:image_link> <updated>2025-03-24T13:39:00Z</updated> <title>#766 One Pin Three Voltage Levels</title> <summary>Designing and testing a circuit to drive and switch an output between 3 voltage levels (0v, VCC, 2.4xVCC) from a single GPIO pin. Tested with an Arduino Uno running at 5V driving a 0V, 5V, 12V output on a single GPIO pin.</summary> <content type="html"><div><p>Designing and testing a circuit to drive and switch an output between 3 voltage levels (0v, VCC, 2.4xVCC) from a single GPIO pin. Tested with an Arduino Uno running at 5V driving a 0V, 5V, 12V output on a single GPIO pin.</p><img src="https://leap.tardate.com/electronics101/power/dicksonchargepump/onepinthreev/assets/onepinthreev_build.jpg" /></div></content> <category term="Arduino"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/radio/lpd433/ht12/simpledemo/</id> <link href="https://leap.tardate.com/radio/lpd433/ht12/simpledemo/"/> <g:image_link>https://leap.tardate.com/radio/lpd433/ht12/simpledemo/assets/simpledemo_build.jpg</g:image_link> <updated>2025-03-18T13:22:00Z</updated> <title>#765 HT12 Simple Demo</title> <summary>A demo of the HT12D decoder and HT12E encoder ICs used with an LPD433 module to broadcast 4 bits of data to an 8-bit address on the 433 MHz UHF/70-centimeter band.</summary> <content type="html"><div><p>A demo of the HT12D decoder and HT12E encoder ICs used with an LPD433 module to broadcast 4 bits of data to an 8-bit address on the 433 MHz UHF/70-centimeter band.</p><img src="https://leap.tardate.com/radio/lpd433/ht12/simpledemo/assets/simpledemo_build.jpg" /></div></content> <category term="Radio"/> <category term="LPD433"/> <category term="HT12"/> </entry> <entry> <id>https://leap.tardate.com/raspberrypi/bpluscase/</id> <link href="https://leap.tardate.com/raspberrypi/bpluscase/"/> <g:image_link>https://leap.tardate.com/raspberrypi/bpluscase/assets/bpluscase_build.jpg</g:image_link> <updated>2025-03-13T10:42:00Z</updated> <title>#764 Raspberry Pi B+ Case</title> <summary>Finally, 3D PLA printing a case for the Raspberry Pi Model B+ ... at the library.</summary> <content type="html"><div><p>Finally, 3D PLA printing a case for the Raspberry Pi Model B+ ... at the library.</p><img src="https://leap.tardate.com/raspberrypi/bpluscase/assets/bpluscase_build.jpg" /></div></content> <category term="Raspberry Pi"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/74ls74/clapswitch/</id> <link href="https://leap.tardate.com/electronics101/74ls74/clapswitch/"/> <g:image_link>https://leap.tardate.com/electronics101/74ls74/clapswitch/assets/clapswitch_build.jpg</g:image_link> <updated>2025-03-12T06:38:00Z</updated> <title>#763 74LS74 Clap Switch</title> <summary>Building a clap-switch circuit with electret input, 555 trigger and 74LS74 latch.</summary> <content type="html"><div><p>Building a clap-switch circuit with electret input, 555 trigger and 74LS74 latch.</p><img src="https://leap.tardate.com/electronics101/74ls74/clapswitch/assets/clapswitch_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="74LS74"/> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/radio/hamclock/</id> <link href="https://leap.tardate.com/radio/hamclock/"/> <g:image_link>https://leap.tardate.com/radio/hamclock/assets/hamclock_build.jpg</g:image_link> <updated>2025-03-05T05:00:00Z</updated> <title>#762 HamClock</title> <summary>Exploring HamClock, the kiosk-style application that displays real time space weather, radio propagation models, operating events and other information particularly useful to the radio amateur. Trying it on macOS, Ubuntu and Raspberry Pi</summary> <content type="html"><div><p>Exploring HamClock, the kiosk-style application that displays real time space weather, radio propagation models, operating events and other information particularly useful to the radio amateur. Trying it on macOS, Ubuntu and Raspberry Pi</p><img src="https://leap.tardate.com/radio/hamclock/assets/hamclock_build.jpg" /></div></content> <category term="Radio"/> <category term="macOS"/> <category term="Ubuntu"/> <category term="Raspberry Pi"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd4069/pushbuttonlatch/</id> <link href="https://leap.tardate.com/electronics101/cd4069/pushbuttonlatch/"/> <g:image_link>https://leap.tardate.com/electronics101/cd4069/pushbuttonlatch/assets/pushbuttonlatch_build.jpg</g:image_link> <updated>2025-02-13T14:08:00Z</updated> <title>#761 Inverter-based Push Button Latch</title> <summary>A latching pushbutton circuit using a CMOS inverter (CD4069)</summary> <content type="html"><div><p>A latching pushbutton circuit using a CMOS inverter (CD4069)</p><img src="https://leap.tardate.com/electronics101/cd4069/pushbuttonlatch/assets/pushbuttonlatch_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="CD4069"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/aaa5vpower/</id> <link href="https://leap.tardate.com/electronics101/power/aaa5vpower/"/> <g:image_link>https://leap.tardate.com/electronics101/power/aaa5vpower/assets/aaa5vpower_build.jpg</g:image_link> <updated>2024-11-24T08:29:00Z</updated> <title>#760 AAA 5v Power Pack</title> <summary>Using an amazingly small little boost converter to make a 5V regulated power pack from a couple of AAA batteries.</summary> <content type="html"><div><p>Using an amazingly small little boost converter to make a 5V regulated power pack from a couple of AAA batteries.</p><img src="https://leap.tardate.com/electronics101/power/aaa5vpower/assets/aaa5vpower_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/pwm/motorcontrolmodule/</id> <link href="https://leap.tardate.com/electronics101/pwm/motorcontrolmodule/"/> <g:image_link>https://leap.tardate.com/electronics101/pwm/motorcontrolmodule/assets/motorcontrolmodule_build.jpg</g:image_link> <updated>2024-10-22T09:43:00Z</updated> <title>#759 PWM Motor Control Module</title> <summary>Test and reverse-engineer cheap PWM module designed for 0%-99% duty cycle control at 5-16V to 10A.</summary> <content type="html"><div><p>Test and reverse-engineer cheap PWM module designed for 0%-99% duty cycle control at 5-16V to 10A.</p><img src="https://leap.tardate.com/electronics101/pwm/motorcontrolmodule/assets/motorcontrolmodule_build.jpg" /></div></content> <category term="PWM"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/usb/usb3poweradapter/</id> <link href="https://leap.tardate.com/electronics101/usb/usb3poweradapter/"/> <g:image_link>https://leap.tardate.com/electronics101/usb/usb3poweradapter/assets/usb3poweradapter_build.jpg</g:image_link> <updated>2024-10-15T04:59:00Z</updated> <title>#758 USB 3 Power Adapter Board</title> <summary>Testing a USB 3 Power Adapter Board that can supply a fixed 9, 12, 15, or 20V at up to 5A</summary> <content type="html"><div><p>Testing a USB 3 Power Adapter Board that can supply a fixed 9, 12, 15, or 20V at up to 5A</p><img src="https://leap.tardate.com/electronics101/usb/usb3poweradapter/assets/usb3poweradapter_build.jpg" /></div></content> <category term="USB"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/windbellkit/</id> <link href="https://leap.tardate.com/electronics101/windbellkit/"/> <g:image_link>https://leap.tardate.com/electronics101/windbellkit/assets/windbellkit_build.jpg</g:image_link> <updated>2024-09-10T14:16:00Z</updated> <title>#757 Wobbly Wind Bell Kit</title> <summary>Building the Wobbly Wind Bell demonstrating a simple RC oscillator circuit. Available as a cheap project kit from many online sellers.</summary> <content type="html"><div><p>Building the Wobbly Wind Bell demonstrating a simple RC oscillator circuit. Available as a cheap project kit from many online sellers.</p><img src="https://leap.tardate.com/electronics101/windbellkit/assets/windbellkit_build.jpg" /></div></content> <category term="BJT"/> <category term="RC"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/equipment/nlb/flashforgecreatorpro2/</id> <link href="https://leap.tardate.com/equipment/nlb/flashforgecreatorpro2/"/> <g:image_link>https://leap.tardate.com/equipment/nlb/flashforgecreatorpro2/assets/flashforgecreatorpro2_build.jpg</g:image_link> <updated>2025-03-03T13:52:00Z</updated> <title>#756 NLB Flashforge Creator Pro 2</title> <summary>Using the amazing PLA 3D Printing services available in Singapore's National Libraries - Flashforge Creator Pro 2, Flashforge Dreamer, and 3D Pens.</summary> <content type="html"><div><p>Using the amazing PLA 3D Printing services available in Singapore's National Libraries - Flashforge Creator Pro 2, Flashforge Dreamer, and 3D Pens.</p><img src="https://leap.tardate.com/equipment/nlb/flashforgecreatorpro2/assets/flashforgecreatorpro2_build.jpg" /></div></content> <category term="NLB MakeIt"/> <category term="3D Print"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/pp3power/</id> <link href="https://leap.tardate.com/electronics101/power/pp3power/"/> <g:image_link>https://leap.tardate.com/electronics101/power/pp3power/assets/pp3power_build.jpg</g:image_link> <updated>2024-09-01T13:14:00Z</updated> <title>#755 9V (PP3) to 5V or 3.3V Power Adapter</title> <summary>Building an MC34063-based buck converter adapter for a 9V battery, with output voltage selectable between 5V and 3.3V.</summary> <content type="html"><div><p>Building an MC34063-based buck converter adapter for a 9V battery, with output voltage selectable between 5V and 3.3V.</p><img src="https://leap.tardate.com/electronics101/power/pp3power/assets/pp3power_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/equipment/nlb/lionsforgecraftlaser/</id> <link href="https://leap.tardate.com/equipment/nlb/lionsforgecraftlaser/"/> <g:image_link>https://leap.tardate.com/equipment/nlb/lionsforgecraftlaser/assets/lionsforgecraftlaser_build.jpg</g:image_link> <updated>2025-03-12T07:47:00Z</updated> <title>#754 NLB Lionsforge Craftlaser</title> <summary>Using the laser cutting services available in Singapore's National Libraries - Lionsforge Craftlaser.</summary> <content type="html"><div><p>Using the laser cutting services available in Singapore's National Libraries - Lionsforge Craftlaser.</p><img src="https://leap.tardate.com/equipment/nlb/lionsforgecraftlaser/assets/lionsforgecraftlaser_build.jpg" /></div></content> <category term="NLB MakeIt"/> <category term="Laser Cutter"/> </entry> <entry> <id>https://leap.tardate.com/books/the-embedded-project-cookbook/</id> <link href="https://leap.tardate.com/books/the-embedded-project-cookbook/"/> <g:image_link>https://leap.tardate.com/books/the-embedded-project-cookbook/assets/the-embedded-project-cookbook_build.jpg</g:image_link> <updated>2025-03-13T07:34:00Z</updated> <title>#753 The Embedded Project Cookbook</title> <summary>Book notes: The Embedded Project Cookbook: A Step-by-Step Guide for Microcontroller Projects, by John T. Taylor. Published October 8, 2024.</summary> <content type="html"><div><p>Book notes: The Embedded Project Cookbook: A Step-by-Step Guide for Microcontroller Projects, by John T. Taylor. Published October 8, 2024.</p><img src="https://leap.tardate.com/books/the-embedded-project-cookbook/assets/the-embedded-project-cookbook_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitallogic/digitalclockkit/</id> <link href="https://leap.tardate.com/electronics101/digitallogic/digitalclockkit/"/> <g:image_link>https://leap.tardate.com/electronics101/digitallogic/digitalclockkit/assets/digitalclockkit_build.jpg</g:image_link> <updated>2024-01-31T17:42:52Z</updated> <title>#740 Digital Clock Kit</title> <summary>Build a CMOS digital logic clock kit and understand the operating principles of the circuit.</summary> <content type="html"><div><p>Build a CMOS digital logic clock kit and understand the operating principles of the circuit.</p><img src="https://leap.tardate.com/electronics101/digitallogic/digitalclockkit/assets/digitalclockkit_build.jpg" /></div></content> <category term="Digital Logic"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/books/active-filter-cookbook/</id> <link href="https://leap.tardate.com/books/active-filter-cookbook/"/> <g:image_link>https://leap.tardate.com/books/active-filter-cookbook/assets/active-filter-cookbook_build.jpg</g:image_link> <updated>2025-03-20T14:05:00Z</updated> <title>#738 Active Filter Cookbook</title> <summary>Book notes: Active Filter Cookbook, by Don Lancaster. First published January 1, 1996.</summary> <content type="html"><div><p>Book notes: Active Filter Cookbook, by Don Lancaster. First published January 1, 1996.</p><img src="https://leap.tardate.com/books/active-filter-cookbook/assets/active-filter-cookbook_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/playground/ntp/ntpclientdemo/</id> <link href="https://leap.tardate.com/playground/ntp/ntpclientdemo/"/> <g:image_link>https://leap.tardate.com/playground/ntp/ntpclientdemo/assets/ntpclientdemo_build.jpg</g:image_link> <updated>2024-01-21T04:50:38Z</updated> <title>#737 NTP Client Demo</title> <summary>Simple demonstration of NTP client requests using an Arduino Ethernet Shield</summary> <content type="html"><div><p>Simple demonstration of NTP client requests using an Arduino Ethernet Shield</p><img src="https://leap.tardate.com/playground/ntp/ntpclientdemo/assets/ntpclientdemo_build.jpg" /></div></content> <category term="Ethernet"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/applesilicon/ch340/</id> <link href="https://leap.tardate.com/playground/applesilicon/ch340/"/> <g:image_link>https://leap.tardate.com/playground/applesilicon/ch340/assets/ch340_build.jpg</g:image_link> <updated>2023-12-29T10:43:33Z</updated> <title>#736 CH340 on Apple Silicon</title> <summary>Programming over CH340-based serial interfaces (such as with some versions of the Arduino Nano) from macOS on Apple Silicon</summary> <content type="html"><div><p>Programming over CH340-based serial interfaces (such as with some versions of the Arduino Nano) from macOS on Apple Silicon</p><img src="https://leap.tardate.com/playground/applesilicon/ch340/assets/ch340_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> <category term="macOS"/> <category term="USB"/> </entry> <entry> <id>https://leap.tardate.com/playground/applesilicon/</id> <link href="https://leap.tardate.com/playground/applesilicon/"/> <g:image_link>https://leap.tardate.com/playground/applesilicon/assets/applesilicon_build.jpg</g:image_link> <updated>2023-12-29T09:19:09Z</updated> <title>#735 Arduino on Apple Silicon</title> <summary>Using the Arduino IDE with Apple Silicon (ARM) machines</summary> <content type="html"><div><p>Using the Arduino IDE with Apple Silicon (ARM) machines</p><img src="https://leap.tardate.com/playground/applesilicon/assets/applesilicon_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> <category term="macOS"/> </entry> <entry> <id>https://leap.tardate.com/equipment/optivisor/</id> <link href="https://leap.tardate.com/equipment/optivisor/"/> <g:image_link>https://leap.tardate.com/equipment/optivisor/assets/optivisor_build.jpg</g:image_link> <updated>2023-12-27T08:26:53Z</updated> <title>#734 Optivisor</title> <summary>Trying a new Optivisor for close-up work</summary> <content type="html"><div><p>Trying a new Optivisor for close-up work</p><img src="https://leap.tardate.com/equipment/optivisor/assets/optivisor_build.jpg" /></div></content> <category term="Tools"/> </entry> <entry> <id>https://leap.tardate.com/equipment/digitaloventhermometer/</id> <link href="https://leap.tardate.com/equipment/digitaloventhermometer/"/> <g:image_link>https://leap.tardate.com/equipment/digitaloventhermometer/assets/digitaloventhermometer_build.jpg</g:image_link> <updated>2023-12-27T08:03:12Z</updated> <title>#733 TS-BN55 Digital Oven Thermometer</title> <summary>Examining and fixing the TS-BN55 Digital Oven Thermometer</summary> <content type="html"><div><p>Examining and fixing the TS-BN55 Digital Oven Thermometer</p><img src="https://leap.tardate.com/equipment/digitaloventhermometer/assets/digitaloventhermometer_build.jpg" /></div></content> <category term="Tools"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/flickerkit/</id> <link href="https://leap.tardate.com/electronics101/led/flickerkit/"/> <g:image_link>https://leap.tardate.com/electronics101/led/flickerkit/assets/flickerkit_build.jpg</g:image_link> <updated>2023-12-27T02:00:21Z</updated> <title>#732 LED Flicker Kit</title> <summary>A flame or fire emulator driven by an ATtiny85 suitable for use in scale models or displays</summary> <content type="html"><div><p>A flame or fire emulator driven by an ATtiny85 suitable for use in scale models or displays</p><img src="https://leap.tardate.com/electronics101/led/flickerkit/assets/flickerkit_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/missingpulsedetector/</id> <link href="https://leap.tardate.com/electronics101/555timer/missingpulsedetector/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/missingpulsedetector/assets/missingpulsedetector_build.jpg</g:image_link> <updated>2025-04-02T07:40:00Z</updated> <title>#729 Missing Pulse Detector</title> <summary>Presenting a missing pulse detector circuit based on a 555 timer monostable, and tested using a 555/4011 interruptible pulse generator.</summary> <content type="html"><div><p>Presenting a missing pulse detector circuit based on a 555 timer monostable, and tested using a 555/4011 interruptible pulse generator.</p><img src="https://leap.tardate.com/electronics101/555timer/missingpulsedetector/assets/missingpulsedetector_build.jpg" /></div></content> <category term="555 Timer"/> <category term="CD4011"/> </entry> <entry> <id>https://leap.tardate.com/playground/switchinputs/</id> <link href="https://leap.tardate.com/playground/switchinputs/"/> <g:image_link>https://leap.tardate.com/playground/switchinputs/assets/switchinputs_build.jpg</g:image_link> <updated>2025-03-28T06:26:00Z</updated> <title>#728 Switch Inputs</title> <summary>Reviewing the main methods for reading switch inputs with an Arduino.</summary> <content type="html"><div><p>Reviewing the main methods for reading switch inputs with an Arduino.</p><img src="https://leap.tardate.com/playground/switchinputs/assets/switchinputs_build.jpg" /></div></content> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/books/power-switching-converters/</id> <link href="https://leap.tardate.com/books/power-switching-converters/"/> <g:image_link>https://leap.tardate.com/books/power-switching-converters/assets/power-switching-converters_build.jpg</g:image_link> <updated>2025-03-26T13:13:00Z</updated> <title>#727 Power-Switching Converters</title> <summary>Book notes: Power-Switching Converters, by Simon S. Ang, Alejandro Oliva. First published April 10, 1995.</summary> <content type="html"><div><p>Book notes: Power-Switching Converters, by Simon S. Ang, Alejandro Oliva. First published April 10, 1995.</p><img src="https://leap.tardate.com/books/power-switching-converters/assets/power-switching-converters_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitallogic/pushpulloutputdriver/</id> <link href="https://leap.tardate.com/electronics101/digitallogic/pushpulloutputdriver/"/> <g:image_link>https://leap.tardate.com/electronics101/digitallogic/pushpulloutputdriver/assets/pushpulloutputdriver_build.jpg</g:image_link> <updated>2025-03-24T04:55:00Z</updated> <title>#726 Push-Pull Output Driver</title> <summary>Testing the basic MOSFET push-pull output driver, similar to designs used in digital logic output or GPIO circuits.</summary> <content type="html"><div><p>Testing the basic MOSFET push-pull output driver, similar to designs used in digital logic output or GPIO circuits.</p><img src="https://leap.tardate.com/electronics101/digitallogic/pushpulloutputdriver/assets/pushpulloutputdriver_build.jpg" /></div></content> <category term="Digital Logic"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/books/c-programming-on-raspberry-pi/</id> <link href="https://leap.tardate.com/books/c-programming-on-raspberry-pi/"/> <g:image_link>https://leap.tardate.com/books/c-programming-on-raspberry-pi/assets/c-programming-on-raspberry-pi_build.jpg</g:image_link> <updated>2025-03-20T16:19:00Z</updated> <title>#725 C Programming on Raspberry Pi</title> <summary>Book notes: C Programming on Raspberry Pi, by Dogan Ibrahim.</summary> <content type="html"><div><p>Book notes: C Programming on Raspberry Pi, by Dogan Ibrahim.</p><img src="https://leap.tardate.com/books/c-programming-on-raspberry-pi/assets/c-programming-on-raspberry-pi_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/encyclopedia-of-electronic-circuits/</id> <link href="https://leap.tardate.com/books/encyclopedia-of-electronic-circuits/"/> <g:image_link>https://leap.tardate.com/books/encyclopedia-of-electronic-circuits/assets/encyclopedia-of-electronic-circuits_build.jpg</g:image_link> <updated>2025-03-20T15:50:00Z</updated> <title>#724 Encyclopedia of Electronic Circuits, volumes 1-7</title> <summary>Book notes: Encyclopedia of Electronic Circuits, volumes 1-7, by Rudolf F. Graf. First published January 1, 1985.</summary> <content type="html"><div><p>Book notes: Encyclopedia of Electronic Circuits, volumes 1-7, by Rudolf F. Graf. First published January 1, 1985.</p><img src="https://leap.tardate.com/books/encyclopedia-of-electronic-circuits/assets/encyclopedia-of-electronic-circuits_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/engineers-mini-notebook-timer-opamp-and-optoelectronic-circuits/</id> <link href="https://leap.tardate.com/books/engineers-mini-notebook-timer-opamp-and-optoelectronic-circuits/"/> <g:image_link>https://leap.tardate.com/books/engineers-mini-notebook-timer-opamp-and-optoelectronic-circuits/assets/engineers-mini-notebook-timer-opamp-and-optoelectronic-circuits_build.jpg</g:image_link> <updated>2025-03-20T15:18:00Z</updated> <title>#723 Timer, Op Amp, and Optoelectronic Circuits & Projects</title> <summary>Book notes: Timer, Op Amp, and Optoelectronic Circuits & Projects, by Forrest M. Mims III. First published January 1, 1900.</summary> <content type="html"><div><p>Book notes: Timer, Op Amp, and Optoelectronic Circuits &amp; Projects, by Forrest M. Mims III. First published January 1, 1900.</p><img src="https://leap.tardate.com/books/engineers-mini-notebook-timer-opamp-and-optoelectronic-circuits/assets/engineers-mini-notebook-timer-opamp-and-optoelectronic-circuits_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/555-timer-applications-sourcebook/</id> <link href="https://leap.tardate.com/books/555-timer-applications-sourcebook/"/> <g:image_link>https://leap.tardate.com/books/555-timer-applications-sourcebook/assets/555-timer-applications-sourcebook_build.jpg</g:image_link> <updated>2025-03-20T15:05:00Z</updated> <title>#722 The 555 Timer Applications Sourcebook</title> <summary>Book notes: The 555 Timer Applications Sourcebook, by Howard M. Berlin. First published August 1, 1976.</summary> <content type="html"><div><p>Book notes: The 555 Timer Applications Sourcebook, by Howard M. Berlin. First published August 1, 1976.</p><img src="https://leap.tardate.com/books/555-timer-applications-sourcebook/assets/555-timer-applications-sourcebook_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/ttl_cookbook/</id> <link href="https://leap.tardate.com/books/ttl_cookbook/"/> <g:image_link>https://leap.tardate.com/books/ttl_cookbook/assets/ttl_cookbook_build.jpg</g:image_link> <updated>2025-03-20T13:49:00Z</updated> <title>#721 TTL Cookbook</title> <summary>Book notes: TTL Cookbook, by Donald E. Lancaster. First published May 1, 1974.</summary> <content type="html"><div><p>Book notes: TTL Cookbook, by Donald E. Lancaster. First published May 1, 1974.</p><img src="https://leap.tardate.com/books/ttl_cookbook/assets/ttl_cookbook_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/the-book-of-555-timer-projects/</id> <link href="https://leap.tardate.com/books/the-book-of-555-timer-projects/"/> <g:image_link>https://leap.tardate.com/books/the-book-of-555-timer-projects/assets/the-book-of-555-timer-projects_build.jpg</g:image_link> <updated>2025-03-20T14:53:00Z</updated> <title>#720 The Book of 555 Timer Projects</title> <summary>Book notes: The Book of 555 Timer Projects, by Dogan Ibrahim.</summary> <content type="html"><div><p>Book notes: The Book of 555 Timer Projects, by Dogan Ibrahim.</p><img src="https://leap.tardate.com/books/the-book-of-555-timer-projects/assets/the-book-of-555-timer-projects_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/dimmer/vco/</id> <link href="https://leap.tardate.com/electronics101/led/dimmer/vco/"/> <g:image_link>https://leap.tardate.com/electronics101/led/dimmer/vco/assets/vco_build.jpg</g:image_link> <updated>2023-09-14T16:38:56Z</updated> <title>#719 Voltage Controlled LED Dimmer</title> <summary>Demonstrating a voltage-controlled LED current source with a triangle wave generator.</summary> <content type="html"><div><p>Demonstrating a voltage-controlled LED current source with a triangle wave generator.</p><img src="https://leap.tardate.com/electronics101/led/dimmer/vco/assets/vco_build.jpg" /></div></content> <category term="LED"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/books/micropython-cookbook/</id> <link href="https://leap.tardate.com/books/micropython-cookbook/"/> <g:image_link>https://leap.tardate.com/books/micropython-cookbook/assets/micropython-cookbook_build.jpg</g:image_link> <updated>2025-03-20T14:42:00Z</updated> <title>#718 MicroPython Cookbook</title> <summary>Book notes: MicroPython Cookbook: Over 110 practical recipes for programming embedded systems and microcontrollers with Python, by Marwan Alsabbagh. Published May 21, 2019.</summary> <content type="html"><div><p>Book notes: MicroPython Cookbook: Over 110 practical recipes for programming embedded systems and microcontrollers with Python, by Marwan Alsabbagh. Published May 21, 2019.</p><img src="https://leap.tardate.com/books/micropython-cookbook/assets/micropython-cookbook_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/raspberry-pi-electronics-projects-for-the-evil-genius/</id> <link href="https://leap.tardate.com/books/raspberry-pi-electronics-projects-for-the-evil-genius/"/> <g:image_link>https://leap.tardate.com/books/raspberry-pi-electronics-projects-for-the-evil-genius/assets/raspberry-pi-electronics-projects-for-the-evil-genius_build.jpg</g:image_link> <updated>2025-03-20T14:42:00Z</updated> <title>#718 Raspberry Pi Electronics Projects for the Evil Genius</title> <summary>Book notes: Raspberry Pi Electronics Projects for the Evil Genius, by Donald Norris. Published May 20, 2016.</summary> <content type="html"><div><p>Book notes: Raspberry Pi Electronics Projects for the Evil Genius, by Donald Norris. Published May 20, 2016.</p><img src="https://leap.tardate.com/books/raspberry-pi-electronics-projects-for-the-evil-genius/assets/raspberry-pi-electronics-projects-for-the-evil-genius_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/flashingled/</id> <link href="https://leap.tardate.com/electronics101/led/flashingled/"/> <g:image_link>https://leap.tardate.com/electronics101/led/flashingled/assets/flashingled_build.jpg</g:image_link> <updated>2025-03-20T08:55:00Z</updated> <title>#717 Flashing LEDs</title> <summary>A quick test and review of a range of 5mm flashing LEDs: red , slow RGB, fast RGB.</summary> <content type="html"><div><p>A quick test and review of a range of 5mm flashing LEDs: red , slow RGB, fast RGB.</p><img src="https://leap.tardate.com/electronics101/led/flashingled/assets/flashingled_build.jpg" /></div></content> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/decorativeflashingled/</id> <link href="https://leap.tardate.com/electronics101/led/decorativeflashingled/"/> <g:image_link>https://leap.tardate.com/electronics101/led/decorativeflashingled/assets/decorativeflashingled_build.jpg</g:image_link> <updated>2025-03-20T07:54:00Z</updated> <title>#716 Decorative Flashing LED</title> <summary>A quick investigation of some decorative flashing LEDs that were scattered around a restaurant feed presentation(!)</summary> <content type="html"><div><p>A quick investigation of some decorative flashing LEDs that were scattered around a restaurant feed presentation(!)</p><img src="https://leap.tardate.com/electronics101/led/decorativeflashingled/assets/decorativeflashingled_build.jpg" /></div></content> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/candleled/</id> <link href="https://leap.tardate.com/electronics101/led/candleled/"/> <g:image_link>https://leap.tardate.com/electronics101/led/candleled/assets/candleled_build.jpg</g:image_link> <updated>2025-03-20T07:54:00Z</updated> <title>#715 Candle LED</title> <summary>A quick test and review of 5mm candle LEDs, that include a built-in candle flicker emulation.</summary> <content type="html"><div><p>A quick test and review of 5mm candle LEDs, that include a built-in candle flicker emulation.</p><img src="https://leap.tardate.com/electronics101/led/candleled/assets/candleled_build.jpg" /></div></content> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/slowglow2/</id> <link href="https://leap.tardate.com/electronics101/555timer/slowglow2/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/slowglow2/assets/slowglow2_build.jpg</g:image_link> <updated>2025-03-19T16:41:00Z</updated> <title>#714 SlowGlow2</title> <summary>A simple slowly-glowing LED effect using a 555 timer. This provides a better fade-in/fade-out than the Slow Glow circuit.</summary> <content type="html"><div><p>A simple slowly-glowing LED effect using a 555 timer. This provides a better fade-in/fade-out than the Slow Glow circuit.</p><img src="https://leap.tardate.com/electronics101/555timer/slowglow2/assets/slowglow2_build.jpg" /></div></content> <category term="555 Timer"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/equipment/usbmultifunctiontester/</id> <link href="https://leap.tardate.com/equipment/usbmultifunctiontester/"/> <g:image_link>https://leap.tardate.com/equipment/usbmultifunctiontester/assets/usbmultifunctiontester_build.jpg</g:image_link> <updated>2025-03-19T05:00:00Z</updated> <title>#713 USB Multifunction Tester</title> <summary>Examining the KWS-MX17 inline USB multi-function tester</summary> <content type="html"><div><p>Examining the KWS-MX17 inline USB multi-function tester</p><img src="https://leap.tardate.com/equipment/usbmultifunctiontester/assets/usbmultifunctiontester_build.jpg" /></div></content> <category term="USB"/> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/radio/lpd433/modules/</id> <link href="https://leap.tardate.com/radio/lpd433/modules/"/> <g:image_link>https://leap.tardate.com/radio/lpd433/modules/assets/modules_build.jpg</g:image_link> <updated>2025-03-18T05:12:00Z</updated> <title>#712 LPD433 Modules</title> <summary>A roundup of readily available LPD433 modules, low power devices operating on the 433 MHz UHF/70-centimeter band.</summary> <content type="html"><div><p>A roundup of readily available LPD433 modules, low power devices operating on the 433 MHz UHF/70-centimeter band.</p><img src="https://leap.tardate.com/radio/lpd433/modules/assets/modules_build.jpg" /></div></content> <category term="Radio"/> <category term="LPD433"/> </entry> <entry> <id>https://leap.tardate.com/books/solid-state-design-for-the-radio-amateur/</id> <link href="https://leap.tardate.com/books/solid-state-design-for-the-radio-amateur/"/> <g:image_link>https://leap.tardate.com/books/solid-state-design-for-the-radio-amateur/assets/solid-state-design-for-the-radio-amateur_build.jpg</g:image_link> <updated>2025-03-17T09:13:00Z</updated> <title>#711 Solid State Design for the Radio Amateur</title> <summary>Book notes: Solid State Design for the Radio Amateur, by Wes Hayward. First published June 1, 1994.</summary> <content type="html"><div><p>Book notes: Solid State Design for the Radio Amateur, by Wes Hayward. First published June 1, 1994.</p><img src="https://leap.tardate.com/books/solid-state-design-for-the-radio-amateur/assets/solid-state-design-for-the-radio-amateur_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/arrl-pic-programming-for-beginners/</id> <link href="https://leap.tardate.com/books/arrl-pic-programming-for-beginners/"/> <g:image_link>https://leap.tardate.com/books/arrl-pic-programming-for-beginners/assets/arrl-pic-programming-for-beginners_build.jpg</g:image_link> <updated>2025-03-17T09:08:00Z</updated> <title>#710 ARRL PIC Programming for Beginners</title> <summary>Book notes: ARRL's PIC Programming for Beginners, by Mark Spencer. First published April 22, 2010.</summary> <content type="html"><div><p>Book notes: ARRL's PIC Programming for Beginners, by Mark Spencer. First published April 22, 2010.</p><img src="https://leap.tardate.com/books/arrl-pic-programming-for-beginners/assets/arrl-pic-programming-for-beginners_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/easy-pic-n/</id> <link href="https://leap.tardate.com/books/easy-pic-n/"/> <g:image_link>https://leap.tardate.com/books/easy-pic-n/assets/easy-pic-n_build.jpg</g:image_link> <updated>2025-03-17T09:04:00Z</updated> <title>#709 Easy Pic'N</title> <summary>Book notes: Easy Pic'N: A Beginners Guide to Using Pic16/17 Microcontrollers from Square 1, by David Benson. First published December 31, 1996.</summary> <content type="html"><div><p>Book notes: Easy Pic'N: A Beginners Guide to Using Pic16/17 Microcontrollers from Square 1, by David Benson. First published December 31, 1996.</p><img src="https://leap.tardate.com/books/easy-pic-n/assets/easy-pic-n_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/arrl-vhf-digital-handbook/</id> <link href="https://leap.tardate.com/books/arrl-vhf-digital-handbook/"/> <g:image_link>https://leap.tardate.com/books/arrl-vhf-digital-handbook/assets/arrl-vhf-digital-handbook_build.jpg</g:image_link> <updated>2025-03-17T08:49:00Z</updated> <title>#708 ARRL VHF Digital Handbook</title> <summary>Book notes: ARRL's VHF Digital Handbook, by Steven R. Ford. First published March 1, 2008.</summary> <content type="html"><div><p>Book notes: ARRL's VHF Digital Handbook, by Steven R. Ford. First published March 1, 2008.</p><img src="https://leap.tardate.com/books/arrl-vhf-digital-handbook/assets/arrl-vhf-digital-handbook_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/arrl-basic-antennas/</id> <link href="https://leap.tardate.com/books/arrl-basic-antennas/"/> <g:image_link>https://leap.tardate.com/books/arrl-basic-antennas/assets/arrl-basic-antennas_build.jpg</g:image_link> <updated>2025-03-17T08:45:00Z</updated> <title>#707 ARRL Basic Antennas</title> <summary>Book notes: Basic Antennas – Understanding Practical Antennas and Designs, by ARRL Inc. First published November 28, 2008.</summary> <content type="html"><div><p>Book notes: Basic Antennas – Understanding Practical Antennas and Designs, by ARRL Inc. First published November 28, 2008.</p><img src="https://leap.tardate.com/books/arrl-basic-antennas/assets/arrl-basic-antennas_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/arrl-extra-class-license-manual/</id> <link href="https://leap.tardate.com/books/arrl-extra-class-license-manual/"/> <g:image_link>https://leap.tardate.com/books/arrl-extra-class-license-manual/assets/arrl-extra-class-license-manual_build.jpg</g:image_link> <updated>2025-03-17T08:37:00Z</updated> <title>#706 ARRL Extra Class License Manual</title> <summary>Book notes: The ARRL Extra Class License Manual, by American Radio Relay League. First published March 1, 2011.</summary> <content type="html"><div><p>Book notes: The ARRL Extra Class License Manual, by American Radio Relay League. First published March 1, 2011.</p><img src="https://leap.tardate.com/books/arrl-extra-class-license-manual/assets/arrl-extra-class-license-manual_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/arrl-general-class-license-manual/</id> <link href="https://leap.tardate.com/books/arrl-general-class-license-manual/"/> <g:image_link>https://leap.tardate.com/books/arrl-general-class-license-manual/assets/arrl-general-class-license-manual_build.jpg</g:image_link> <updated>2025-03-17T08:29:00Z</updated> <title>#705 ARRL General Class License Manual</title> <summary>Book notes: The ARRL General Class License Manual, by American Radio Relay League. First published December 20, 2010.</summary> <content type="html"><div><p>Book notes: The ARRL General Class License Manual, by American Radio Relay League. First published December 20, 2010.</p><img src="https://leap.tardate.com/books/arrl-general-class-license-manual/assets/arrl-general-class-license-manual_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/arrl-ham-radio-license-manual/</id> <link href="https://leap.tardate.com/books/arrl-ham-radio-license-manual/"/> <g:image_link>https://leap.tardate.com/books/arrl-ham-radio-license-manual/assets/arrl-ham-radio-license-manual_build.jpg</g:image_link> <updated>2025-03-17T08:14:00Z</updated> <title>#704 ARRL Ham Radio License Manual</title> <summary>Book notes: The ARRL Ham Radio License Manual, by American Radio Relay League, Third Edition. First published January 1, 1988.</summary> <content type="html"><div><p>Book notes: The ARRL Ham Radio License Manual, by American Radio Relay League, Third Edition. First published January 1, 1988.</p><img src="https://leap.tardate.com/books/arrl-ham-radio-license-manual/assets/arrl-ham-radio-license-manual_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/microcontroller-based-radio-telemetry-projects/</id> <link href="https://leap.tardate.com/books/microcontroller-based-radio-telemetry-projects/"/> <g:image_link>https://leap.tardate.com/books/microcontroller-based-radio-telemetry-projects/assets/microcontroller-based-radio-telemetry-projects_build.jpg</g:image_link> <updated>2025-03-17T07:54:00Z</updated> <title>#703 Microcontroller Based Radio Telemetry Projects</title> <summary>Book notes: Microcontroller Based Radio Telemetry Projects, by Dogan Ibrahim. Published January 1, 2015.</summary> <content type="html"><div><p>Book notes: Microcontroller Based Radio Telemetry Projects, by Dogan Ibrahim. Published January 1, 2015.</p><img src="https://leap.tardate.com/books/microcontroller-based-radio-telemetry-projects/assets/microcontroller-based-radio-telemetry-projects_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/arm-microcontroller-projects/</id> <link href="https://leap.tardate.com/books/arm-microcontroller-projects/"/> <g:image_link>https://leap.tardate.com/books/arm-microcontroller-projects/assets/arm-microcontroller-projects_build.jpg</g:image_link> <updated>2025-03-17T07:45:00Z</updated> <title>#702 ARM Microcontroller Projects</title> <summary>Book notes: ARM Microcontroller Projects, by Dogan Ibrahim. Published May 5, 2016.</summary> <content type="html"><div><p>Book notes: ARM Microcontroller Projects, by Dogan Ibrahim. Published May 5, 2016.</p><img src="https://leap.tardate.com/books/arm-microcontroller-projects/assets/arm-microcontroller-projects_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/arrl-low-power-communications/</id> <link href="https://leap.tardate.com/books/arrl-low-power-communications/"/> <g:image_link>https://leap.tardate.com/books/arrl-low-power-communications/assets/arrl-low-power-communications_build.jpg</g:image_link> <updated>2025-03-17T07:36:00Z</updated> <title>#701 ARRL Low Power Communications</title> <summary>Book notes: ARRL's Low Power Communications: The Art and Science of QRP, by Richard H Arland. First published January 1, 2012.</summary> <content type="html"><div><p>Book notes: ARRL's Low Power Communications: The Art and Science of QRP, by Richard H Arland. First published January 1, 2012.</p><img src="https://leap.tardate.com/books/arrl-low-power-communications/assets/arrl-low-power-communications_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/audio/laserharpkit/</id> <link href="https://leap.tardate.com/audio/laserharpkit/"/> <g:image_link>https://leap.tardate.com/audio/laserharpkit/assets/laserharpkit_build.jpg</g:image_link> <updated>2023-03-27T13:57:21Z</updated> <title>#700 Laser Harp Kit</title> <summary>Build and test an 8051-based laser harp kit</summary> <content type="html"><div><p>Build and test an 8051-based laser harp kit</p><img src="https://leap.tardate.com/audio/laserharpkit/assets/laserharpkit_build.jpg" /></div></content> <category term="Audio"/> <category term="Laser"/> <category term="LED"/> <category term="8051"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/voltagereference/lm336/</id> <link href="https://leap.tardate.com/electronics101/voltagereference/lm336/"/> <g:image_link>https://leap.tardate.com/electronics101/voltagereference/lm336/assets/lm336_build.jpg</g:image_link> <updated>2025-03-14T08:26:00Z</updated> <title>#699 LM336 Voltage Reference</title> <summary>Exploring the LM336 precision reference and testing the minimum temperature coefficient circuit design.</summary> <content type="html"><div><p>Exploring the LM336 precision reference and testing the minimum temperature coefficient circuit design.</p><img src="https://leap.tardate.com/electronics101/voltagereference/lm336/assets/lm336_build.jpg" /></div></content> <category term="Voltage Reference"/> <category term="LM336"/> <category term="1N60P"/> </entry> <entry> <id>https://leap.tardate.com/books/electronic-principles/</id> <link href="https://leap.tardate.com/books/electronic-principles/"/> <g:image_link>https://leap.tardate.com/books/electronic-principles/assets/electronic-principles_build.jpg</g:image_link> <updated>2025-03-13T10:17:00Z</updated> <title>#698 Electronic Principles</title> <summary>Book notes: Electronic Principles, by Albert Malvino, David J Bates, Patrick E Hoppe. First published March 1, 1979.</summary> <content type="html"><div><p>Book notes: Electronic Principles, by Albert Malvino, David J Bates, Patrick E Hoppe. First published March 1, 1979.</p><img src="https://leap.tardate.com/books/electronic-principles/assets/electronic-principles_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/digital-logic-and-computer-design/</id> <link href="https://leap.tardate.com/books/digital-logic-and-computer-design/"/> <g:image_link>https://leap.tardate.com/books/digital-logic-and-computer-design/assets/digital-logic-and-computer-design_build.jpg</g:image_link> <updated>2025-03-13T10:07:00Z</updated> <title>#697 Digital Logic and Computer Design</title> <summary>Book notes: Digital Logic and Computer Design, by M. Morris Mano. First published January 1, 1979.</summary> <content type="html"><div><p>Book notes: Digital Logic and Computer Design, by M. Morris Mano. First published January 1, 1979.</p><img src="https://leap.tardate.com/books/digital-logic-and-computer-design/assets/digital-logic-and-computer-design_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/playground/attiny/flickeringfireeffect/</id> <link href="https://leap.tardate.com/playground/attiny/flickeringfireeffect/"/> <g:image_link>https://leap.tardate.com/playground/attiny/flickeringfireeffect/assets/flickeringfireeffect_build.jpg</g:image_link> <updated>2023-03-08T15:12:51Z</updated> <title>#696 Flickering Fire Effect</title> <summary>A flickering fire effect with 3 LEDs and adjustable brightness controlled by an ATtiny85</summary> <content type="html"><div><p>A flickering fire effect with 3 LEDs and adjustable brightness controlled by an ATtiny85</p><img src="https://leap.tardate.com/playground/attiny/flickeringfireeffect/assets/flickeringfireeffect_build.jpg" /></div></content> <category term="LED"/> <category term="Arduino"/> <category term="AVR"/> </entry> <entry> <id>https://leap.tardate.com/playground/attiny/pwmmotorcontrol/</id> <link href="https://leap.tardate.com/playground/attiny/pwmmotorcontrol/"/> <g:image_link>https://leap.tardate.com/playground/attiny/pwmmotorcontrol/assets/pwmmotorcontrol_build.jpg</g:image_link> <updated>2023-03-06T15:02:31Z</updated> <title>#695 ATtiny PMW Motor Control</title> <summary>Variable speed PWM motor control with an ATtiny85</summary> <content type="html"><div><p>Variable speed PWM motor control with an ATtiny85</p><img src="https://leap.tardate.com/playground/attiny/pwmmotorcontrol/assets/pwmmotorcontrol_build.jpg" /></div></content> <category term="Motors"/> <category term="Arduino"/> <category term="AVR"/> </entry> <entry> <id>https://leap.tardate.com/books/raspberry-pi-cookbook/</id> <link href="https://leap.tardate.com/books/raspberry-pi-cookbook/"/> <g:image_link>https://leap.tardate.com/books/raspberry-pi-cookbook/assets/raspberry-pi-cookbook_build.jpg</g:image_link> <updated>2025-03-13T09:58:00Z</updated> <title>#694 Raspberry Pi Cookbook</title> <summary>Book notes: Raspberry Pi Cookbook, by Simon Monk. First published January 1, 2013.</summary> <content type="html"><div><p>Book notes: Raspberry Pi Cookbook, by Simon Monk. First published January 1, 2013.</p><img src="https://leap.tardate.com/books/raspberry-pi-cookbook/assets/raspberry-pi-cookbook_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/pic-microcontroller-projects-in-c/</id> <link href="https://leap.tardate.com/books/pic-microcontroller-projects-in-c/"/> <g:image_link>https://leap.tardate.com/books/pic-microcontroller-projects-in-c/assets/pic-microcontroller-projects-in-c_build.jpg</g:image_link> <updated>2025-03-13T09:49:00Z</updated> <title>#693 PIC Microcontroller Projects in C</title> <summary>Book notes: PIC Microcontroller Projects in C: Basic to Advanced, by Dogan Ibrahim. First published January 1, 2014.</summary> <content type="html"><div><p>Book notes: PIC Microcontroller Projects in C: Basic to Advanced, by Dogan Ibrahim. First published January 1, 2014.</p><img src="https://leap.tardate.com/books/pic-microcontroller-projects-in-c/assets/pic-microcontroller-projects-in-c_build.jpg" /></div></content> <category term="Books"/> <category term="PIC"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/latch/</id> <link href="https://leap.tardate.com/electronics101/555timer/latch/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/latch/assets/latch_build.jpg</g:image_link> <updated>2023-02-07T13:39:25Z</updated> <title>#692 Push-button Latch</title> <summary>Testing a simple push-button latched switch circuit for on/off control using the 555 timer</summary> <content type="html"><div><p>Testing a simple push-button latched switch circuit for on/off control using the 555 timer</p><img src="https://leap.tardate.com/electronics101/555timer/latch/assets/latch_build.jpg" /></div></content> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/equipment/ch2pc4/</id> <link href="https://leap.tardate.com/equipment/ch2pc4/"/> <g:image_link>https://leap.tardate.com/equipment/ch2pc4/assets/ch2pc4_build.jpg</g:image_link> <updated>2023-02-07T10:26:05Z</updated> <title>#691 CH2PC4 NiMH Charger</title> <summary>A few quick notes on the Energizer NiMH charger CH2PC4</summary> <content type="html"><div><p>A few quick notes on the Energizer NiMH charger CH2PC4</p><img src="https://leap.tardate.com/equipment/ch2pc4/assets/ch2pc4_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/books/encyclopedia-of-electronic-components/</id> <link href="https://leap.tardate.com/books/encyclopedia-of-electronic-components/"/> <g:image_link>https://leap.tardate.com/books/encyclopedia-of-electronic-components/assets/encyclopedia-of-electronic-components_build.jpg</g:image_link> <updated>2025-03-13T09:29:00Z</updated> <title>#690 Encyclopedia of Electronic Components</title> <summary>Book notes: Encyclopedia of Electronic Components, Volumes 1, 2, 3, by Charles Platt. First published September 22, 2012</summary> <content type="html"><div><p>Book notes: Encyclopedia of Electronic Components, Volumes 1, 2, 3, by Charles Platt. First published September 22, 2012</p><img src="https://leap.tardate.com/books/encyclopedia-of-electronic-components/assets/encyclopedia-of-electronic-components_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/programmablefrequencyreference/</id> <link href="https://leap.tardate.com/electronics101/oscillators/programmablefrequencyreference/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/programmablefrequencyreference/assets/programmablefrequencyreference_build.jpg</g:image_link> <updated>2023-01-11T11:54:47Z</updated> <title>#689 Programmable Frequency Reference</title> <summary>Build and test a programmable frequency reference capable of dialing in 4095 discrete frequencies between 488Hz and 1MHz</summary> <content type="html"><div><p>Build and test a programmable frequency reference capable of dialing in 4095 discrete frequencies between 488Hz and 1MHz</p><img src="https://leap.tardate.com/electronics101/oscillators/programmablefrequencyreference/assets/programmablefrequencyreference_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/crystallocked4mhzcd4001/</id> <link href="https://leap.tardate.com/electronics101/oscillators/crystallocked4mhzcd4001/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/crystallocked4mhzcd4001/assets/crystallocked4mhzcd4001_build.jpg</g:image_link> <updated>2023-01-11T11:54:47Z</updated> <title>#688 Crystal-locked 4MHz Oscillator</title> <summary>Testing a 4MHz crystal-locked Pierce oscillator using CD4001 CMOS NOR gates</summary> <content type="html"><div><p>Testing a 4MHz crystal-locked Pierce oscillator using CD4001 CMOS NOR gates</p><img src="https://leap.tardate.com/electronics101/oscillators/crystallocked4mhzcd4001/assets/crystallocked4mhzcd4001_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/crystallocked455khzcd4001/</id> <link href="https://leap.tardate.com/electronics101/oscillators/crystallocked455khzcd4001/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/crystallocked455khzcd4001/assets/crystallocked455khzcd4001_build.jpg</g:image_link> <updated>2023-01-11T11:54:47Z</updated> <title>#687 Crystal-locked 455kHz Oscillator</title> <summary>Testing a 455kHz crystal-locked Pierce oscillator using CD4001 CMOS NOR gates</summary> <content type="html"><div><p>Testing a 455kHz crystal-locked Pierce oscillator using CD4001 CMOS NOR gates</p><img src="https://leap.tardate.com/electronics101/oscillators/crystallocked455khzcd4001/assets/crystallocked455khzcd4001_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/books/practical-electronics/</id> <link href="https://leap.tardate.com/books/practical-electronics/"/> <g:image_link>https://leap.tardate.com/books/practical-electronics/assets/practical-electronics_build.jpg</g:image_link> <updated>2025-03-13T09:21:00Z</updated> <title>#686 Practical Electronics</title> <summary>Book notes: Practical Electronics: Components and Techniques, by John M. Hughes. First published September 25, 2014.</summary> <content type="html"><div><p>Book notes: Practical Electronics: Components and Techniques, by John M. Hughes. First published September 25, 2014.</p><img src="https://leap.tardate.com/books/practical-electronics/assets/practical-electronics_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/engineers-mini-notebook-sensor-projects/</id> <link href="https://leap.tardate.com/books/engineers-mini-notebook-sensor-projects/"/> <g:image_link>https://leap.tardate.com/books/engineers-mini-notebook-sensor-projects/assets/engineers-mini-notebook-sensor-projects_build.jpg</g:image_link> <updated>2025-03-13T09:09:00Z</updated> <title>#685 Sensor Projects</title> <summary>Book notes: Engineer's Mini-Notebook Sensor Projects, by Forrest M. Mims III. First published January 1, 1996.</summary> <content type="html"><div><p>Book notes: Engineer's Mini-Notebook Sensor Projects, by Forrest M. Mims III. First published January 1, 1996.</p><img src="https://leap.tardate.com/books/engineers-mini-notebook-sensor-projects/assets/engineers-mini-notebook-sensor-projects_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/engineers-mini-notebook-solar-cell-projects/</id> <link href="https://leap.tardate.com/books/engineers-mini-notebook-solar-cell-projects/"/> <g:image_link>https://leap.tardate.com/books/engineers-mini-notebook-solar-cell-projects/assets/engineers-mini-notebook-solar-cell-projects_build.jpg</g:image_link> <updated>2025-03-13T09:02:00Z</updated> <title>#684 Solar Cell Projects</title> <summary>Book notes: Engineer's Mini-Notebook Solar Cell Projects, by Forrest M. Mims III. First published January 1, 1999.</summary> <content type="html"><div><p>Book notes: Engineer's Mini-Notebook Solar Cell Projects, by Forrest M. Mims III. First published January 1, 1999.</p><img src="https://leap.tardate.com/books/engineers-mini-notebook-solar-cell-projects/assets/engineers-mini-notebook-solar-cell-projects_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/engineers-mini-notebook-optoelectronics-projects/</id> <link href="https://leap.tardate.com/books/engineers-mini-notebook-optoelectronics-projects/"/> <g:image_link>https://leap.tardate.com/books/engineers-mini-notebook-optoelectronics-projects/assets/engineers-mini-notebook-optoelectronics-projects_build.jpg</g:image_link> <updated>2025-03-13T08:52:00Z</updated> <title>#683 Optoelectronics Circuits</title> <summary>Book notes: Engineer's Mini-Notebook: Optoelectronics Circuits, by Forrest M. Mims III. First published January 1, 1996.</summary> <content type="html"><div><p>Book notes: Engineer's Mini-Notebook: Optoelectronics Circuits, by Forrest M. Mims III. First published January 1, 1996.</p><img src="https://leap.tardate.com/books/engineers-mini-notebook-optoelectronics-projects/assets/engineers-mini-notebook-optoelectronics-projects_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioamps/electretsounddetectionmodule/</id> <link href="https://leap.tardate.com/audio/audioamps/electretsounddetectionmodule/"/> <g:image_link>https://leap.tardate.com/audio/audioamps/electretsounddetectionmodule/assets/electretsounddetectionmodule_build.jpg</g:image_link> <updated>2023-01-08T10:30:19Z</updated> <title>#682 Electret Sound Detection Module</title> <summary>Reverse-engineering a commercial electret sound detection module intended for use with an Arduino/microcontroller as a sound level trigger (not audio pre-amp).</summary> <content type="html"><div><p>Reverse-engineering a commercial electret sound detection module intended for use with an Arduino/microcontroller as a sound level trigger (not audio pre-amp).</p><img src="https://leap.tardate.com/audio/audioamps/electretsounddetectionmodule/assets/electretsounddetectionmodule_build.jpg" /></div></content> <category term="Arduino"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioamps/electretpreamp/</id> <link href="https://leap.tardate.com/audio/audioamps/electretpreamp/"/> <g:image_link>https://leap.tardate.com/audio/audioamps/electretpreamp/assets/electretpreamp_build.jpg</g:image_link> <updated>2023-01-07T04:28:01Z</updated> <title>#681 Electret Audio Pre-amplifier</title> <summary>Design and test an electret pre-amplifier comprising an LM358 op-amp active high-pass filter.</summary> <content type="html"><div><p>Design and test an electret pre-amplifier comprising an LM358 op-amp active high-pass filter.</p><img src="https://leap.tardate.com/audio/audioamps/electretpreamp/assets/electretpreamp_build.jpg" /></div></content> <category term="Breadboard Bling"/> <category term="OpAmp"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/equipment/minirotarytool/</id> <link href="https://leap.tardate.com/equipment/minirotarytool/"/> <g:image_link>https://leap.tardate.com/equipment/minirotarytool/assets/minirotarytool_build.jpg</g:image_link> <updated>2023-01-06T13:42:22Z</updated> <title>#680 Mini Rotary Tool</title> <summary>unboxing and initial review of a cordless Mini Rotary Tool for engraving and model carving</summary> <content type="html"><div><p>unboxing and initial review of a cordless Mini Rotary Tool for engraving and model carving</p><img src="https://leap.tardate.com/equipment/minirotarytool/assets/minirotarytool_build.jpg" /></div></content> <category term="Tools"/> </entry> <entry> <id>https://leap.tardate.com/books/engineers-mini-notebook-magnet-projects/</id> <link href="https://leap.tardate.com/books/engineers-mini-notebook-magnet-projects/"/> <g:image_link>https://leap.tardate.com/books/engineers-mini-notebook-magnet-projects/assets/engineers-mini-notebook-magnet-projects_build.jpg</g:image_link> <updated>2025-03-13T08:42:00Z</updated> <title>#679 Magnet and Magnet Sensor Projects</title> <summary>Book notes: Engineer's Mini-Notebook: Magnet and Magnet Sensor Projects, by Forrest M. Mims III. First published January 1, 1998.</summary> <content type="html"><div><p>Book notes: Engineer's Mini-Notebook: Magnet and Magnet Sensor Projects, by Forrest M. Mims III. First published January 1, 1998.</p><img src="https://leap.tardate.com/books/engineers-mini-notebook-magnet-projects/assets/engineers-mini-notebook-magnet-projects_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/engineers-mini-notebook-communications-projects/</id> <link href="https://leap.tardate.com/books/engineers-mini-notebook-communications-projects/"/> <g:image_link>https://leap.tardate.com/books/engineers-mini-notebook-communications-projects/assets/engineers-mini-notebook-communications-projects_build.jpg</g:image_link> <updated>2025-03-13T08:27:00Z</updated> <title>#678 Communications Projects</title> <summary>Book notes: Engineer's Mini-Notebook Communications Projects, by Forrest M. Mims III. First published January 1, 1987.</summary> <content type="html"><div><p>Book notes: Engineer's Mini-Notebook Communications Projects, by Forrest M. Mims III. First published January 1, 1987.</p><img src="https://leap.tardate.com/books/engineers-mini-notebook-communications-projects/assets/engineers-mini-notebook-communications-projects_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/engineers-mini-notebook-555-timer-ic-circuits/</id> <link href="https://leap.tardate.com/books/engineers-mini-notebook-555-timer-ic-circuits/"/> <g:image_link>https://leap.tardate.com/books/engineers-mini-notebook-555-timer-ic-circuits/assets/engineers-mini-notebook-555-timer-ic-circuits_build.jpg</g:image_link> <updated>2025-03-13T08:19:00Z</updated> <title>#677 555 Timer IC Circuits</title> <summary>Book notes: Engineer's Mini-Notebook 555 Timer IC Circuits, by Forrest M. Mims III. First published January 1, 1989.</summary> <content type="html"><div><p>Book notes: Engineer's Mini-Notebook 555 Timer IC Circuits, by Forrest M. Mims III. First published January 1, 1989.</p><img src="https://leap.tardate.com/books/engineers-mini-notebook-555-timer-ic-circuits/assets/engineers-mini-notebook-555-timer-ic-circuits_build.jpg" /></div></content> <category term="Books"/> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/ldrledring/</id> <link href="https://leap.tardate.com/electronics101/oscillators/ldrledring/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/ldrledring/assets/ldrledring_build.jpg</g:image_link> <updated>2022-12-23T09:30:56Z</updated> <title>#676 LED-LDR Ring Oscillator</title> <summary>Building a simple ring oscillator using a light dependent resistor to couple the LED stages. From a circuit published in Elektor 2012/07.</summary> <content type="html"><div><p>Building a simple ring oscillator using a light dependent resistor to couple the LED stages. From a circuit published in Elektor 2012/07.</p><img src="https://leap.tardate.com/electronics101/oscillators/ldrledring/assets/ldrledring_build.jpg" /></div></content> <category term="Oscillators"/> <category term="LED"/> <category term="LDR"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ldr/dataslicer/</id> <link href="https://leap.tardate.com/electronics101/ldr/dataslicer/"/> <g:image_link>https://leap.tardate.com/electronics101/ldr/dataslicer/assets/dataslicer_build.jpg</g:image_link> <updated>2022-12-21T10:21:30Z</updated> <title>#675 LDR Data Slicer Trigger</title> <summary>Using a data slicer to extract a clean trigger signal from a light dependent resistor (LDR)</summary> <content type="html"><div><p>Using a data slicer to extract a clean trigger signal from a light dependent resistor (LDR)</p><img src="https://leap.tardate.com/electronics101/ldr/dataslicer/assets/dataslicer_build.jpg" /></div></content> <category term="Sensors"/> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ldr/differentialcomparator/</id> <link href="https://leap.tardate.com/electronics101/ldr/differentialcomparator/"/> <g:image_link>https://leap.tardate.com/electronics101/ldr/differentialcomparator/assets/differentialcomparator_build.jpg</g:image_link> <updated>2022-12-21T10:21:30Z</updated> <title>#674 LDR Differential Comparator</title> <summary>Using a differential amplifier to extract a clean trigger signal from a light dependent resistor (LDR)</summary> <content type="html"><div><p>Using a differential amplifier to extract a clean trigger signal from a light dependent resistor (LDR)</p><img src="https://leap.tardate.com/electronics101/ldr/differentialcomparator/assets/differentialcomparator_build.jpg" /></div></content> <category term="Sensors"/> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/books/engineers-mini-notebook-op-amp-circuits/</id> <link href="https://leap.tardate.com/books/engineers-mini-notebook-op-amp-circuits/"/> <g:image_link>https://leap.tardate.com/books/engineers-mini-notebook-op-amp-circuits/assets/engineers-mini-notebook-op-amp-circuits_build.jpg</g:image_link> <updated>2025-03-13T08:13:00Z</updated> <title>#673 Op-Amp Circuits</title> <summary>Book notes: Engineer's Mini-Notebook Op-Amp Circuits, by Forrest M. Mims III. First published January 1, 1985.</summary> <content type="html"><div><p>Book notes: Engineer's Mini-Notebook Op-Amp Circuits, by Forrest M. Mims III. First published January 1, 1985.</p><img src="https://leap.tardate.com/books/engineers-mini-notebook-op-amp-circuits/assets/engineers-mini-notebook-op-amp-circuits_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/make-analog-synthesizers/</id> <link href="https://leap.tardate.com/books/make-analog-synthesizers/"/> <g:image_link>https://leap.tardate.com/books/make-analog-synthesizers/assets/make-analog-synthesizers_build.jpg</g:image_link> <updated>2025-03-13T08:04:00Z</updated> <title>#672 Make: Analog Synthesizers</title> <summary>Book notes: Make: Analog Synthesizers: Make Electronic Sounds the Synth-DIY Way, by Ray Wilson. First published March 22, 2013.</summary> <content type="html"><div><p>Book notes: Make: Analog Synthesizers: Make Electronic Sounds the Synth-DIY Way, by Ray Wilson. First published March 22, 2013.</p><img src="https://leap.tardate.com/books/make-analog-synthesizers/assets/make-analog-synthesizers_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/the-essential-guide-to-electronics-in-shenzhen/</id> <link href="https://leap.tardate.com/books/the-essential-guide-to-electronics-in-shenzhen/"/> <g:image_link>https://leap.tardate.com/books/the-essential-guide-to-electronics-in-shenzhen/assets/the-essential-guide-to-electronics-in-shenzhen_build.jpg</g:image_link> <updated>2025-03-13T07:55:00Z</updated> <title>#671 The Essential Guide to Electronics in Shenzhen</title> <summary>Book notes: The Essential Guide to Electronics in Shenzhen, by Andrew Huang. First published January 1, 2016.</summary> <content type="html"><div><p>Book notes: The Essential Guide to Electronics in Shenzhen, by Andrew Huang. First published January 1, 2016.</p><img src="https://leap.tardate.com/books/the-essential-guide-to-electronics-in-shenzhen/assets/the-essential-guide-to-electronics-in-shenzhen_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/playground/nano/expansionboard/</id> <link href="https://leap.tardate.com/playground/nano/expansionboard/"/> <g:image_link>https://leap.tardate.com/playground/nano/expansionboard/assets/expansionboard_build.jpg</g:image_link> <updated>2022-11-22T15:39:59Z</updated> <title>#670 Nano Expansion Board</title> <summary>Testing and reverse engineering a cheap Arduino Nano Expansion board, also pondering why GVS instead of GSV or GVSG.</summary> <content type="html"><div><p>Testing and reverse engineering a cheap Arduino Nano Expansion board, also pondering why GVS instead of GSV or GVSG.</p><img src="https://leap.tardate.com/playground/nano/expansionboard/assets/expansionboard_build.jpg" /></div></content> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/books/soldersmoke/</id> <link href="https://leap.tardate.com/books/soldersmoke/"/> <g:image_link>https://leap.tardate.com/books/soldersmoke/assets/soldersmoke_build.jpg</g:image_link> <updated>2025-03-13T07:42:00Z</updated> <title>#669 SolderSmoke</title> <summary>Book notes: SolderSmoke: Global Adventures in Wireless Electronics, by Bill Meara. First published March 1, 2009.</summary> <content type="html"><div><p>Book notes: SolderSmoke: Global Adventures in Wireless Electronics, by Bill Meara. First published March 1, 2009.</p><img src="https://leap.tardate.com/books/soldersmoke/assets/soldersmoke_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/radio/codepracticeoscillator/</id> <link href="https://leap.tardate.com/radio/codepracticeoscillator/"/> <g:image_link>https://leap.tardate.com/radio/codepracticeoscillator/assets/codepracticeoscillator_build.jpg</g:image_link> <updated>2022-11-08T15:36:38Z</updated> <title>#668 Code Practice Oscillator</title> <summary>Build and test a simple 2-transistor code practice oscillator</summary> <content type="html"><div><p>Build and test a simple 2-transistor code practice oscillator</p><img src="https://leap.tardate.com/radio/codepracticeoscillator/assets/codepracticeoscillator_build.jpg" /></div></content> <category term="BJT"/> <category term="RC"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mc34063/buckconverter/</id> <link href="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mc34063/buckconverter/"/> <g:image_link>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mc34063/buckconverter/assets/buckconverter_build.jpg</g:image_link> <updated>2022-11-07T15:38:54Z</updated> <title>#667 MC34063 Buck Converter</title> <summary>Design and test a basic 9v to 5v step-down regulator circuit using the MC34063A.</summary> <content type="html"><div><p>Design and test a basic 9v to 5v step-down regulator circuit using the MC34063A.</p><img src="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mc34063/buckconverter/assets/buckconverter_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/books/build-your-own-transistor-radios/</id> <link href="https://leap.tardate.com/books/build-your-own-transistor-radios/"/> <g:image_link>https://leap.tardate.com/books/build-your-own-transistor-radios/assets/build-your-own-transistor-radios_build.jpg</g:image_link> <updated>2025-03-13T03:14:00Z</updated> <title>#666 Build Your Own Transistor Radios</title> <summary>Book notes: Build Your Own Transistor Radios: A Hobbyist's Guide to High-Performance and Low-Powered Radio Circuits, by Ronald Quan. First published January 1, 2012.</summary> <content type="html"><div><p>Book notes: Build Your Own Transistor Radios: A Hobbyist's Guide to High-Performance and Low-Powered Radio Circuits, by Ronald Quan. First published January 1, 2012.</p><img src="https://leap.tardate.com/books/build-your-own-transistor-radios/assets/build-your-own-transistor-radios_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/arrl-small-antennas-for-small-spaces/</id> <link href="https://leap.tardate.com/books/arrl-small-antennas-for-small-spaces/"/> <g:image_link>https://leap.tardate.com/books/arrl-small-antennas-for-small-spaces/assets/arrl-small-antennas-for-small-spaces_build.jpg</g:image_link> <updated>2025-03-13T03:09:00Z</updated> <title>#665 ARRL's Small Antennas for Small Spaces</title> <summary>Book notes: ARRL's Small Antennas for Small Spaces, by Steve Ford. First published May 1, 2011.</summary> <content type="html"><div><p>Book notes: ARRL's Small Antennas for Small Spaces, by Steve Ford. First published May 1, 2011.</p><img src="https://leap.tardate.com/books/arrl-small-antennas-for-small-spaces/assets/arrl-small-antennas-for-small-spaces_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/equipment/lightcontrolswitchkit/</id> <link href="https://leap.tardate.com/equipment/lightcontrolswitchkit/"/> <g:image_link>https://leap.tardate.com/equipment/lightcontrolswitchkit/assets/lightcontrolswitchkit_build.jpg</g:image_link> <updated>2022-10-28T00:56:33Z</updated> <title>#664 Light Control Switch Kit</title> <summary>Building an LDR-controlled relay kit with hysteresis/delay for on and off transitions (LM393 comparator with RC-dampened inputs)</summary> <content type="html"><div><p>Building an LDR-controlled relay kit with hysteresis/delay for on and off transitions (LM393 comparator with RC-dampened inputs)</p><img src="https://leap.tardate.com/equipment/lightcontrolswitchkit/assets/lightcontrolswitchkit_build.jpg" /></div></content> <category term="LDR"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/displays/lcd3digit/</id> <link href="https://leap.tardate.com/electronics101/displays/lcd3digit/"/> <g:image_link>https://leap.tardate.com/electronics101/displays/lcd3digit/assets/lcd3digit_build.jpg</g:image_link> <updated>2022-10-23T14:55:59Z</updated> <title>#663 3-Digit LCD Panel</title> <summary>Testing a small 3V, 3-digit LCD panel with an example of driving the mulitplexed LCD (1/4 duty, 1/2 bias) with an Arduino/ATmega328 sketch.</summary> <content type="html"><div><p>Testing a small 3V, 3-digit LCD panel with an example of driving the mulitplexed LCD (1/4 duty, 1/2 bias) with an Arduino/ATmega328 sketch.</p><img src="https://leap.tardate.com/electronics101/displays/lcd3digit/assets/lcd3digit_build.jpg" /></div></content> <category term="LCD"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/books/homebrew-cookbook/</id> <link href="https://leap.tardate.com/books/homebrew-cookbook/"/> <g:image_link>https://leap.tardate.com/books/homebrew-cookbook/assets/homebrew-cookbook_build.jpg</g:image_link> <updated>2025-03-13T03:04:00Z</updated> <title>#662 Homebrew Cook Book</title> <summary>Book notes: Homebrew Cook Book, by Eamon Skelton EI9GQ. Published July 14, 2016.</summary> <content type="html"><div><p>Book notes: Homebrew Cook Book, by Eamon Skelton EI9GQ. Published July 14, 2016.</p><img src="https://leap.tardate.com/books/homebrew-cookbook/assets/homebrew-cookbook_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/basic-communications-electronics/</id> <link href="https://leap.tardate.com/books/basic-communications-electronics/"/> <g:image_link>https://leap.tardate.com/books/basic-communications-electronics/assets/basic-communications-electronics_build.jpg</g:image_link> <updated>2025-03-13T02:55:00Z</updated> <title>#661 Basic Communications Electronics</title> <summary>Book notes: Basic Communications Electronics: Jack Hudson, Jerry Luecke. First published June 1, 1999.</summary> <content type="html"><div><p>Book notes: Basic Communications Electronics: Jack Hudson, Jerry Luecke. First published June 1, 1999.</p><img src="https://leap.tardate.com/books/basic-communications-electronics/assets/basic-communications-electronics_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/arrl-hands-on-radio-experiments-vol2/</id> <link href="https://leap.tardate.com/books/arrl-hands-on-radio-experiments-vol2/"/> <g:image_link>https://leap.tardate.com/books/arrl-hands-on-radio-experiments-vol2/assets/arrl-hands-on-radio-experiments-vol2_build.jpg</g:image_link> <updated>2025-03-13T02:50:00Z</updated> <title>#660 ARRL Hands-On Radio Experiments Volume 2</title> <summary>Book notes: ARRL's Hands-On Radio Experiments Volume 2, by H. Ward Silver. Published January 1, 2013.</summary> <content type="html"><div><p>Book notes: ARRL's Hands-On Radio Experiments Volume 2, by H. Ward Silver. Published January 1, 2013.</p><img src="https://leap.tardate.com/books/arrl-hands-on-radio-experiments-vol2/assets/arrl-hands-on-radio-experiments-vol2_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/arrl-hands-on-radio-experiments-vol3/</id> <link href="https://leap.tardate.com/books/arrl-hands-on-radio-experiments-vol3/"/> <g:image_link>https://leap.tardate.com/books/arrl-hands-on-radio-experiments-vol3/assets/arrl-hands-on-radio-experiments-vol3_build.jpg</g:image_link> <updated>2025-03-13T02:35:00Z</updated> <title>#659 ARRL Hands-On Radio Experiments Volume 3</title> <summary>Book notes: ARRL's Hands-On Radio Experiments Volume 3, by H. Ward Silver. Published January 1, 2018.</summary> <content type="html"><div><p>Book notes: ARRL's Hands-On Radio Experiments Volume 3, by H. Ward Silver. Published January 1, 2018.</p><img src="https://leap.tardate.com/books/arrl-hands-on-radio-experiments-vol3/assets/arrl-hands-on-radio-experiments-vol3_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/the-complete-esp32-projects-guide/</id> <link href="https://leap.tardate.com/books/the-complete-esp32-projects-guide/"/> <g:image_link>https://leap.tardate.com/books/the-complete-esp32-projects-guide/assets/the-complete-esp32-projects-guide_build.jpg</g:image_link> <updated>2025-03-13T02:16:00Z</updated> <title>#658 The Complete ESP32 Projects Guide</title> <summary>Book notes: The Complete ESP32 Projects Guide, Dogan Ibrahim. Published January 1, 2019.</summary> <content type="html"><div><p>Book notes: The Complete ESP32 Projects Guide, Dogan Ibrahim. Published January 1, 2019.</p><img src="https://leap.tardate.com/books/the-complete-esp32-projects-guide/assets/the-complete-esp32-projects-guide_build.jpg" /></div></content> <category term="Books"/> <category term="ESP32"/> </entry> <entry> <id>https://leap.tardate.com/books/the-art-of-electronics-x-chapters/</id> <link href="https://leap.tardate.com/books/the-art-of-electronics-x-chapters/"/> <g:image_link>https://leap.tardate.com/books/the-art-of-electronics-x-chapters/assets/the-art-of-electronics-x-chapters_build.jpg</g:image_link> <updated>2025-03-12T15:31:00Z</updated> <title>#657 The Art of Electronics: The X Chapters</title> <summary>Book notes: The Art of Electronics: The X Chapters, by Paul Horowitz, Winfield Hill. Published January 30, 2020.</summary> <content type="html"><div><p>Book notes: The Art of Electronics: The X Chapters, by Paul Horowitz, Winfield Hill. Published January 30, 2020.</p><img src="https://leap.tardate.com/books/the-art-of-electronics-x-chapters/assets/the-art-of-electronics-x-chapters_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/schmittcrystallockedoscillator/</id> <link href="https://leap.tardate.com/electronics101/oscillators/schmittcrystallockedoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/schmittcrystallockedoscillator/assets/schmittcrystallockedoscillator_build.jpg</g:image_link> <updated>2022-09-16T13:35:07Z</updated> <title>#656 Crystal-Locked Schmitt Oscillator</title> <summary>Testing a basic crystal-locked Schmitt oscillator using a 74HC14</summary> <content type="html"><div><p>Testing a basic crystal-locked Schmitt oscillator using a 74HC14</p><img src="https://leap.tardate.com/electronics101/oscillators/schmittcrystallockedoscillator/assets/schmittcrystallockedoscillator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/books/the-art-of-electronics/</id> <link href="https://leap.tardate.com/books/the-art-of-electronics/"/> <g:image_link>https://leap.tardate.com/books/the-art-of-electronics/assets/the-art-of-electronics_build.jpg</g:image_link> <updated>2025-03-12T15:25:00Z</updated> <title>#655 The Art of Electronics</title> <summary>Book notes: The Art of Electronics, by Paul Horowitz, Winfield Hill. First published January 1, 1980.</summary> <content type="html"><div><p>Book notes: The Art of Electronics, by Paul Horowitz, Winfield Hill. First published January 1, 1980.</p><img src="https://leap.tardate.com/books/the-art-of-electronics/assets/the-art-of-electronics_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/diy-drones-for-the-evil-genius/</id> <link href="https://leap.tardate.com/books/diy-drones-for-the-evil-genius/"/> <g:image_link>https://leap.tardate.com/books/diy-drones-for-the-evil-genius/assets/diy-drones-for-the-evil-genius_build.jpg</g:image_link> <updated>2025-03-12T15:13:00Z</updated> <title>#654 DIY Drones for the Evil Genius</title> <summary>Book notes: DIY Drones for the Evil Genius: Design, Build, and Customize Your Own Drones, by Ian Cinnamon, Romi Kadri, Fitz Tepper. Published December 2, 2016.</summary> <content type="html"><div><p>Book notes: DIY Drones for the Evil Genius: Design, Build, and Customize Your Own Drones, by Ian Cinnamon, Romi Kadri, Fitz Tepper. Published December 2, 2016.</p><img src="https://leap.tardate.com/books/diy-drones-for-the-evil-genius/assets/diy-drones-for-the-evil-genius_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/audio/visualization/usbledvolumeindicatorkit/</id> <link href="https://leap.tardate.com/audio/visualization/usbledvolumeindicatorkit/"/> <g:image_link>https://leap.tardate.com/audio/visualization/usbledvolumeindicatorkit/assets/usbledvolumeindicatorkit_build.jpg</g:image_link> <updated>2022-09-03T11:05:51Z</updated> <title>#653 USB Audio Level Indicator Kit</title> <summary>An electret-input audio level kit based on cascading LM358 stages with LED indicators</summary> <content type="html"><div><p>An electret-input audio level kit based on cascading LM358 stages with LED indicators</p><img src="https://leap.tardate.com/audio/visualization/usbledvolumeindicatorkit/assets/usbledvolumeindicatorkit_build.jpg" /></div></content> <category term="LM358"/> <category term="Audio"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/books/building-smart-drones-with-esp8266-and-arduino/</id> <link href="https://leap.tardate.com/books/building-smart-drones-with-esp8266-and-arduino/"/> <g:image_link>https://leap.tardate.com/books/building-smart-drones-with-esp8266-and-arduino/assets/building-smart-drones-with-esp8266-and-arduino_build.jpg</g:image_link> <updated>2025-03-12T15:07:00Z</updated> <title>#652 Building Smart Drones with ESP8266 and Arduino</title> <summary>Book notes: Building Smart Drones with ESP8266 and Arduino: Build exciting drones by leveraging the capabilities of Arduino and ESP8266, by Syed Omar Faruk Towaha. Published February 27, 2018.</summary> <content type="html"><div><p>Book notes: Building Smart Drones with ESP8266 and Arduino: Build exciting drones by leveraging the capabilities of Arduino and ESP8266, by Syed Omar Faruk Towaha. Published February 27, 2018.</p><img src="https://leap.tardate.com/books/building-smart-drones-with-esp8266-and-arduino/assets/building-smart-drones-with-esp8266-and-arduino_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/experimental-methods-in-rf-design/</id> <link href="https://leap.tardate.com/books/experimental-methods-in-rf-design/"/> <g:image_link>https://leap.tardate.com/books/experimental-methods-in-rf-design/assets/experimental-methods-in-rf-design_build.jpg</g:image_link> <updated>2025-03-12T15:01:00Z</updated> <title>#651 Experimental Methods in RF Design</title> <summary>Book notes: Experimental Methods in RF Design, by Wes H. Hayward, Rick Campbell, Bob Larkin. First published February 1, 2003.</summary> <content type="html"><div><p>Book notes: Experimental Methods in RF Design, by Wes H. Hayward, Rick Campbell, Bob Larkin. First published February 1, 2003.</p><img src="https://leap.tardate.com/books/experimental-methods-in-rf-design/assets/experimental-methods-in-rf-design_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/arrl-handbook-2017/</id> <link href="https://leap.tardate.com/books/arrl-handbook-2017/"/> <g:image_link>https://leap.tardate.com/books/arrl-handbook-2017/assets/arrl-handbook-2017_build.jpg</g:image_link> <updated>2025-03-12T14:37:00Z</updated> <title>#650 ARRL Handbook 2017</title> <summary>Book notes: The ARRL Handbook for Radio Communications 2017. Published September 30, 2016.</summary> <content type="html"><div><p>Book notes: The ARRL Handbook for Radio Communications 2017. Published September 30, 2016.</p><img src="https://leap.tardate.com/books/arrl-handbook-2017/assets/arrl-handbook-2017_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/the-essence-of-analog-electronics/</id> <link href="https://leap.tardate.com/books/the-essence-of-analog-electronics/"/> <g:image_link>https://leap.tardate.com/books/the-essence-of-analog-electronics/assets/the-essence-of-analog-electronics_build.jpg</g:image_link> <updated>2025-03-12T14:22:00Z</updated> <title>#649 The Essence of Analog Electronics</title> <summary>Books notes: The Essence of Analog Electronics, by Colin Lunn. First published November 30, 1996.</summary> <content type="html"><div><p>Books notes: The Essence of Analog Electronics, by Colin Lunn. First published November 30, 1996.</p><img src="https://leap.tardate.com/books/the-essence-of-analog-electronics/assets/the-essence-of-analog-electronics_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/the-electronics-of-radio/</id> <link href="https://leap.tardate.com/books/the-electronics-of-radio/"/> <g:image_link>https://leap.tardate.com/books/the-electronics-of-radio/assets/the-electronics-of-radio_build.jpg</g:image_link> <updated>2025-03-12T14:15:00Z</updated> <title>#648 The Electronics of Radio</title> <summary>Book notes: The Electronics of Radio, by David B. Rutledge. First published August 13, 1999.</summary> <content type="html"><div><p>Book notes: The Electronics of Radio, by David B. Rutledge. First published August 13, 1999.</p><img src="https://leap.tardate.com/books/the-electronics-of-radio/assets/the-electronics-of-radio_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/equipment/humidifiermodule/</id> <link href="https://leap.tardate.com/equipment/humidifiermodule/"/> <g:image_link>https://leap.tardate.com/equipment/humidifiermodule/assets/humidifiermodule_build.jpg</g:image_link> <updated>2022-07-21T14:36:37Z</updated> <title>#647 USB Humidifier Module</title> <summary>Testing a cheap USB/5V powered humidifier module the produces prodigious volumes of mist</summary> <content type="html"><div><p>Testing a cheap USB/5V powered humidifier module the produces prodigious volumes of mist</p><img src="https://leap.tardate.com/equipment/humidifiermodule/assets/humidifiermodule_build.jpg" /></div></content> <category term="USB"/> <category term="environmental"/> </entry> <entry> <id>https://leap.tardate.com/books/radio-and-electronics-cookbook/</id> <link href="https://leap.tardate.com/books/radio-and-electronics-cookbook/"/> <g:image_link>https://leap.tardate.com/books/radio-and-electronics-cookbook/assets/radio-and-electronics-cookbook_build.jpg</g:image_link> <updated>2025-03-12T14:04:00Z</updated> <title>#646 Radio and Electronics Cookbook</title> <summary>Book notes: Radio and Electronics Cookbook, Radio Society of Great Britain. First published January 3, 2001.</summary> <content type="html"><div><p>Book notes: Radio and Electronics Cookbook, Radio Society of Great Britain. First published January 3, 2001.</p><img src="https://leap.tardate.com/books/radio-and-electronics-cookbook/assets/radio-and-electronics-cookbook_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/ic-converter-cookbook/</id> <link href="https://leap.tardate.com/books/ic-converter-cookbook/"/> <g:image_link>https://leap.tardate.com/books/ic-converter-cookbook/assets/ic-converter-cookbook_build.jpg</g:image_link> <updated>2025-03-12T13:55:00Z</updated> <title>#645 IC Converter Cookbook</title> <summary>Book notes: IC converter cookbook, by Walter G. Jung. First published January 1, 1978.</summary> <content type="html"><div><p>Book notes: IC converter cookbook, by Walter G. Jung. First published January 1, 1978.</p><img src="https://leap.tardate.com/books/ic-converter-cookbook/assets/ic-converter-cookbook_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/practical-oscillator-handbook/</id> <link href="https://leap.tardate.com/books/practical-oscillator-handbook/"/> <g:image_link>https://leap.tardate.com/books/practical-oscillator-handbook/assets/practical-oscillator-handbook_build.jpg</g:image_link> <updated>2025-03-12T13:49:00Z</updated> <title>#644 Practical Oscillator Handbook</title> <summary>Book notes: Practical Oscillator Handbook, by Irving M. Gottlieb. First published November 30, 1970.</summary> <content type="html"><div><p>Book notes: Practical Oscillator Handbook, by Irving M. Gottlieb. First published November 30, 1970.</p><img src="https://leap.tardate.com/books/practical-oscillator-handbook/assets/practical-oscillator-handbook_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/wirelessledmodule/</id> <link href="https://leap.tardate.com/electronics101/power/wirelessledmodule/"/> <g:image_link>https://leap.tardate.com/electronics101/power/wirelessledmodule/assets/wirelessledmodule_build.jpg</g:image_link> <updated>2022-07-12T16:13:31Z</updated> <title>#643 XKT-511 Wireless LED Module</title> <summary>Investigating a wireless LED power module based on the XKT-511 chip</summary> <content type="html"><div><p>Investigating a wireless LED power module based on the XKT-511 chip</p><img src="https://leap.tardate.com/electronics101/power/wirelessledmodule/assets/wirelessledmodule_build.jpg" /></div></content> <category term="Power"/> <category term="Wireless"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mt3608/safecontrol/</id> <link href="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mt3608/safecontrol/"/> <g:image_link>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mt3608/safecontrol/assets/safecontrol_build.jpg</g:image_link> <updated>2022-07-03T14:31:59Z</updated> <title>#642 MT3608 Safe Control</title> <summary>Configuring variable boost control with the MT3608 that is safe for all rated input voltages</summary> <content type="html"><div><p>Configuring variable boost control with the MT3608 that is safe for all rated input voltages</p><img src="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mt3608/safecontrol/assets/safecontrol_build.jpg" /></div></content> <category term="Power"/> <category term="SMPS"/> </entry> <entry> <id>https://leap.tardate.com/books/electronics-cookbook/</id> <link href="https://leap.tardate.com/books/electronics-cookbook/"/> <g:image_link>https://leap.tardate.com/books/electronics-cookbook/assets/electronics-cookbook_build.jpg</g:image_link> <updated>2025-03-12T13:40:00Z</updated> <title>#641 Electronics Cookbook</title> <summary>Book notes: CMOS Cookbook, by Donald E. Lancaster, Howard M. Berlin. First published January 1, 1988.</summary> <content type="html"><div><p>Book notes: CMOS Cookbook, by Donald E. Lancaster, Howard M. Berlin. First published January 1, 1988.</p><img src="https://leap.tardate.com/books/electronics-cookbook/assets/electronics-cookbook_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/cmos-cookbook/</id> <link href="https://leap.tardate.com/books/cmos-cookbook/"/> <g:image_link>https://leap.tardate.com/books/cmos-cookbook/assets/cmos-cookbook_build.jpg</g:image_link> <updated>2025-03-12T13:33:00Z</updated> <title>#640 CMOS Cookbook</title> <summary>Book notes: CMOS Cookbook, by Donald E. Lancaster, Howard M. Berlin. First published January 1, 1988.</summary> <content type="html"><div><p>Book notes: CMOS Cookbook, by Donald E. Lancaster, Howard M. Berlin. First published January 1, 1988.</p><img src="https://leap.tardate.com/books/cmos-cookbook/assets/cmos-cookbook_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/circuit-scrapbook-vol1/</id> <link href="https://leap.tardate.com/books/circuit-scrapbook-vol1/"/> <g:image_link>https://leap.tardate.com/books/circuit-scrapbook-vol1/assets/circuit-scrapbook-vol1_build.jpg</g:image_link> <updated>2025-03-12T13:28:00Z</updated> <title>#639 Circuit Scrapbook, Vol 1</title> <summary>Book notes: The Forrest Mims Circuit Scrapbook, Vol 1, First published September 1, 2000.</summary> <content type="html"><div><p>Book notes: The Forrest Mims Circuit Scrapbook, Vol 1, First published September 1, 2000.</p><img src="https://leap.tardate.com/books/circuit-scrapbook-vol1/assets/circuit-scrapbook-vol1_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/building-arduino-plcs/</id> <link href="https://leap.tardate.com/books/building-arduino-plcs/"/> <g:image_link>https://leap.tardate.com/books/building-arduino-plcs/assets/building-arduino-plcs_build.jpg</g:image_link> <updated>2025-03-12T13:23:00Z</updated> <title>#638 Building Arduino PLCs</title> <summary>Book notes: Building Arduino PLCs: The essential techniques you need to develop Arduino-based PLCs, by Pradeeka Seneviratne. Published February 7, 2017.</summary> <content type="html"><div><p>Book notes: Building Arduino PLCs: The essential techniques you need to develop Arduino-based PLCs, by Pradeeka Seneviratne. Published February 7, 2017.</p><img src="https://leap.tardate.com/books/building-arduino-plcs/assets/building-arduino-plcs_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd4069/logicprobe/</id> <link href="https://leap.tardate.com/electronics101/cd4069/logicprobe/"/> <g:image_link>https://leap.tardate.com/electronics101/cd4069/logicprobe/assets/logicprobe_build.jpg</g:image_link> <updated>2022-05-24T04:49:42Z</updated> <title>#637 CD4069 Logic Probe</title> <summary>A simple logic probe using inverter gates</summary> <content type="html"><div><p>A simple logic probe using inverter gates</p><img src="https://leap.tardate.com/electronics101/cd4069/logicprobe/assets/logicprobe_build.jpg" /></div></content> <category term="Digital Logic"/> <category term="CMOS/TTL"/> <category term="CD4069"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd4001/logicprobe/</id> <link href="https://leap.tardate.com/electronics101/cd4001/logicprobe/"/> <g:image_link>https://leap.tardate.com/electronics101/cd4001/logicprobe/assets/logicprobe_build.jpg</g:image_link> <updated>2022-05-22T06:12:54Z</updated> <title>#636 CD4001 Logic Probe</title> <summary>A simple logic probe using NOR gates</summary> <content type="html"><div><p>A simple logic probe using NOR gates</p><img src="https://leap.tardate.com/electronics101/cd4001/logicprobe/assets/logicprobe_build.jpg" /></div></content> <category term="Digital Logic"/> <category term="CMOS/TTL"/> <category term="CD4001"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd4001/srlatch/</id> <link href="https://leap.tardate.com/electronics101/cd4001/srlatch/"/> <g:image_link>https://leap.tardate.com/electronics101/cd4001/srlatch/assets/srlatch_build.jpg</g:image_link> <updated>2022-05-19T11:15:43Z</updated> <title>#635 CD4001 SR Latch</title> <summary>Set-Reset latch implemented with CD4001 NOR gates</summary> <content type="html"><div><p>Set-Reset latch implemented with CD4001 NOR gates</p><img src="https://leap.tardate.com/electronics101/cd4001/srlatch/assets/srlatch_build.jpg" /></div></content> <category term="Digital Logic"/> <category term="CMOS/TTL"/> <category term="CD4001"/> </entry> <entry> <id>https://leap.tardate.com/books/audio-ic-users-handbook/</id> <link href="https://leap.tardate.com/books/audio-ic-users-handbook/"/> <g:image_link>https://leap.tardate.com/books/audio-ic-users-handbook/assets/audio-ic-users-handbook_build.jpg</g:image_link> <updated>2025-03-12T13:17:00Z</updated> <title>#634 Audio IC Users Handbook</title> <summary>Book notes: Audio IC Users Handbook, by R.M. Marston. First published January 1, 1997.</summary> <content type="html"><div><p>Book notes: Audio IC Users Handbook, by R.M. Marston. First published January 1, 1997.</p><img src="https://leap.tardate.com/books/audio-ic-users-handbook/assets/audio-ic-users-handbook_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/serialinterface/usbtorj45/</id> <link href="https://leap.tardate.com/electronics101/serialinterface/usbtorj45/"/> <g:image_link>https://leap.tardate.com/electronics101/serialinterface/usbtorj45/assets/usbtorj45_build.jpg</g:image_link> <updated>2022-05-12T16:26:16Z</updated> <title>#633 USB to RJ45 Adapter</title> <summary>building a USB to RJ45 adapter with the CH340G and MAX3232 chipsets</summary> <content type="html"><div><p>building a USB to RJ45 adapter with the CH340G and MAX3232 chipsets</p><img src="https://leap.tardate.com/electronics101/serialinterface/usbtorj45/assets/usbtorj45_build.jpg" /></div></content> <category term="RS232"/> <category term="Serial"/> <category term="USB"/> <category term="RJ45"/> </entry> <entry> <id>https://leap.tardate.com/equipment/foamcutter/</id> <link href="https://leap.tardate.com/equipment/foamcutter/"/> <g:image_link>https://leap.tardate.com/equipment/foamcutter/assets/foamcutter_build.jpg</g:image_link> <updated>2022-05-03T03:50:12Z</updated> <title>#632 Foam Cutters</title> <summary>Examining various foam cutter designs and building a couple for small-scale foam sculpting</summary> <content type="html"><div><p>Examining various foam cutter designs and building a couple for small-scale foam sculpting</p><img src="https://leap.tardate.com/equipment/foamcutter/assets/foamcutter_build.jpg" /></div></content> <category term="Craft"/> <category term="Tools"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/longrunning/</id> <link href="https://leap.tardate.com/electronics101/555timer/longrunning/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/longrunning/assets/longrunning_build.jpg</g:image_link> <updated>2023-01-07T03:32:06Z</updated> <title>#631 Long Running Timer</title> <summary>Building a very low frequency 555 timer circuit, and pushing the envelope with a 1GΩ zero-electrolytic design using the low-leakage TLC556C</summary> <content type="html"><div><p>Building a very low frequency 555 timer circuit, and pushing the envelope with a 1GΩ zero-electrolytic design using the low-leakage TLC556C</p><img src="https://leap.tardate.com/electronics101/555timer/longrunning/assets/longrunning_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/books/ham-radio-for-arduino-and-picaxe/</id> <link href="https://leap.tardate.com/books/ham-radio-for-arduino-and-picaxe/"/> <g:image_link>https://leap.tardate.com/books/ham-radio-for-arduino-and-picaxe/assets/ham-radio-for-arduino-and-picaxe_build.jpg</g:image_link> <updated>2025-03-12T13:06:00Z</updated> <title>#630 Ham Radio for Arduino and PICAXE</title> <summary>Book notes: Ham Radio for Arduino and PICAXE – Easy to Build Microcontroller Projects, ARRL. First published March 25, 2013.</summary> <content type="html"><div><p>Book notes: Ham Radio for Arduino and PICAXE – Easy to Build Microcontroller Projects, ARRL. First published March 25, 2013.</p><img src="https://leap.tardate.com/books/ham-radio-for-arduino-and-picaxe/assets/ham-radio-for-arduino-and-picaxe_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/equipment/waterlevelcontrolkit/</id> <link href="https://leap.tardate.com/equipment/waterlevelcontrolkit/"/> <g:image_link>https://leap.tardate.com/equipment/waterlevelcontrolkit/assets/waterlevelcontrolkit_build.jpg</g:image_link> <updated>2022-04-05T05:55:11Z</updated> <title>#629 Water-Level Control Kit</title> <summary>Build and test a high-low switching circuit with relay output. It is intended for monitoring a water tank level and switching a pump.</summary> <content type="html"><div><p>Build and test a high-low switching circuit with relay output. It is intended for monitoring a water tank level and switching a pump.</p><img src="https://leap.tardate.com/equipment/waterlevelcontrolkit/assets/waterlevelcontrolkit_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Control"/> </entry> <entry> <id>https://leap.tardate.com/books/arduino-for-radio-amateur-applications/</id> <link href="https://leap.tardate.com/books/arduino-for-radio-amateur-applications/"/> <g:image_link>https://leap.tardate.com/books/arduino-for-radio-amateur-applications/assets/arduino-for-radio-amateur-applications_build.jpg</g:image_link> <updated>2025-03-12T12:37:00Z</updated> <title>#628 Arduino for Radio Amateur Applications</title> <summary>Book notes: Arduino for Radio Amateur Applications, by Glen Popiel.</summary> <content type="html"><div><p>Book notes: Arduino for Radio Amateur Applications, by Glen Popiel.</p><img src="https://leap.tardate.com/books/arduino-for-radio-amateur-applications/assets/arduino-for-radio-amateur-applications_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/arduino-projects-for-amateur-radio/</id> <link href="https://leap.tardate.com/books/arduino-projects-for-amateur-radio/"/> <g:image_link>https://leap.tardate.com/books/arduino-projects-for-amateur-radio/assets/arduino-projects-for-amateur-radio_build.jpg</g:image_link> <updated>2025-03-12T12:32:00Z</updated> <title>#627 Arduino Projects for Amateur Radio</title> <summary>Book notes: Arduino Projects for Amateur Radio, by Jack Purdum, Dennis Kidder. First published September 4, 2014.</summary> <content type="html"><div><p>Book notes: Arduino Projects for Amateur Radio, by Jack Purdum, Dennis Kidder. First published September 4, 2014.</p><img src="https://leap.tardate.com/books/arduino-projects-for-amateur-radio/assets/arduino-projects-for-amateur-radio_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/more-arduino-projects-for-ham-radio/</id> <link href="https://leap.tardate.com/books/more-arduino-projects-for-ham-radio/"/> <g:image_link>https://leap.tardate.com/books/more-arduino-projects-for-ham-radio/assets/more-arduino-projects-for-ham-radio_build.jpg</g:image_link> <updated>2025-03-12T12:25:00Z</updated> <title>#626 More Arduino Projects for Ham Radio</title> <summary>Book notes: More Arduino Projects for Ham Radio, by Glen Popiel. Published May 1, 2017.</summary> <content type="html"><div><p>Book notes: More Arduino Projects for Ham Radio, by Glen Popiel. Published May 1, 2017.</p><img src="https://leap.tardate.com/books/more-arduino-projects-for-ham-radio/assets/more-arduino-projects-for-ham-radio_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/remotecontrolcandles/</id> <link href="https://leap.tardate.com/electronics101/led/remotecontrolcandles/"/> <g:image_link>https://leap.tardate.com/electronics101/led/remotecontrolcandles/assets/remotecontrolcandles_build.jpg</g:image_link> <updated>2022-02-21T17:33:20Z</updated> <title>#625 Remote Control Candles</title> <summary>Examining some intrared-controlled LED candles, reverse-engineering the control protocol, and making them dance to the tune of an Arduino.</summary> <content type="html"><div><p>Examining some intrared-controlled LED candles, reverse-engineering the control protocol, and making them dance to the tune of an Arduino.</p><img src="https://leap.tardate.com/electronics101/led/remotecontrolcandles/assets/remotecontrolcandles_build.jpg" /></div></content> <category term="IR"/> <category term="Arduino"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/playground/ir/dumper/</id> <link href="https://leap.tardate.com/playground/ir/dumper/"/> <g:image_link>https://leap.tardate.com/playground/ir/dumper/assets/dumper_build.jpg</g:image_link> <updated>2022-02-21T17:33:20Z</updated> <title>#624 IR Dumper</title> <summary>Reverse-engineering infrared protocols using the Arduino-IRremote library.</summary> <content type="html"><div><p>Reverse-engineering infrared protocols using the Arduino-IRremote library.</p><img src="https://leap.tardate.com/playground/ir/dumper/assets/dumper_build.jpg" /></div></content> <category term="IR"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/books/arduino-for-ham-radio/</id> <link href="https://leap.tardate.com/books/arduino-for-ham-radio/"/> <g:image_link>https://leap.tardate.com/books/arduino-for-ham-radio/assets/arduino-for-ham-radio_build.jpg</g:image_link> <updated>2025-03-12T12:19:00Z</updated> <title>#623 Arduino for Ham Radio</title> <summary>Book notes: Arduino for Ham Radio: A Radio Amateur's Guide to Open Source Electronics and Microcontroller Projects, by Glen Popiel. First published January 1, 2014.</summary> <content type="html"><div><p>Book notes: Arduino for Ham Radio: A Radio Amateur's Guide to Open Source Electronics and Microcontroller Projects, by Glen Popiel. First published January 1, 2014.</p><img src="https://leap.tardate.com/books/arduino-for-ham-radio/assets/arduino-for-ham-radio_build.jpg" /></div></content> <category term="Books"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/books/arduino-for-musicians/</id> <link href="https://leap.tardate.com/books/arduino-for-musicians/"/> <g:image_link>https://leap.tardate.com/books/arduino-for-musicians/assets/arduino-for-musicians_build.jpg</g:image_link> <updated>2025-03-12T12:11:00Z</updated> <title>#622 Arduino for Musicians</title> <summary>Book notes: Arduino for Musicians: A Complete Guide to Arduino and Teensy Microcontrollers, by Brent Edstrom. First published March 1, 2016.</summary> <content type="html"><div><p>Book notes: Arduino for Musicians: A Complete Guide to Arduino and Teensy Microcontrollers, by Brent Edstrom. First published March 1, 2016.</p><img src="https://leap.tardate.com/books/arduino-for-musicians/assets/arduino-for-musicians_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/kraft/kubelmagic/</id> <link href="https://leap.tardate.com/kraft/kubelmagic/"/> <g:image_link>https://leap.tardate.com/kraft/kubelmagic/assets/kubelmagic_build.jpg</g:image_link> <updated>2022-01-15T15:04:20Z</updated> <title>#621 KubelMagic</title> <summary>A walnut, Brengun 1:144 Kübelwagen and a miniaturised SMD version of a BJT oscillator - and with a bit of practice, some close-up model magic.</summary> <content type="html"><div><p>A walnut, Brengun 1:144 Kübelwagen and a miniaturised SMD version of a BJT oscillator - and with a bit of practice, some close-up model magic.</p><img src="https://leap.tardate.com/kraft/kubelmagic/assets/kubelmagic_build.jpg" /></div></content> <category term="LED"/> <category term="Oscillators"/> <category term="Craft"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/smdpracticeboards/star/</id> <link href="https://leap.tardate.com/electronics101/smdpracticeboards/star/"/> <g:image_link>https://leap.tardate.com/electronics101/smdpracticeboards/star/assets/star_build.jpg</g:image_link> <updated>2022-01-20T14:40:39Z</updated> <title>#620 Glowing Star SMD Practice Board</title> <summary>Testing the Five-Pointed Star SMD Practice Board with LM358 oscillator LED effects.</summary> <content type="html"><div><p>Testing the Five-Pointed Star SMD Practice Board with LM358 oscillator LED effects.</p><img src="https://leap.tardate.com/electronics101/smdpracticeboards/star/assets/star_build.jpg" /></div></content> <category term="SMD"/> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/audio/speechsynthesis/syn6288module/</id> <link href="https://leap.tardate.com/audio/speechsynthesis/syn6288module/"/> <g:image_link>https://leap.tardate.com/audio/speechsynthesis/syn6288module/assets/syn6288module_build.jpg</g:image_link> <updated>2022-01-18T16:05:12Z</updated> <title>#619 SYN6288 Module</title> <summary>Investigating the SYN6288 Chinese text to speech module with simple Arduino demonstration.</summary> <content type="html"><div><p>Investigating the SYN6288 Chinese text to speech module with simple Arduino demonstration.</p><img src="https://leap.tardate.com/audio/speechsynthesis/syn6288module/assets/syn6288module_build.jpg" /></div></content> <category term="Arduino"/> <category term="Speech Synthesis"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/books/analog-circuits-cookbook/</id> <link href="https://leap.tardate.com/books/analog-circuits-cookbook/"/> <g:image_link>https://leap.tardate.com/books/analog-circuits-cookbook/assets/analog-circuits-cookbook_build.jpg</g:image_link> <updated>2025-03-12T10:21:00Z</updated> <title>#618 Analog Circuits Cookbook</title> <summary>Book notes: Analog Circuits Cookbook, Second Edition, by Ian Hickman. First published January 1, 1999.</summary> <content type="html"><div><p>Book notes: Analog Circuits Cookbook, Second Edition, by Ian Hickman. First published January 1, 1999.</p><img src="https://leap.tardate.com/books/analog-circuits-cookbook/assets/analog-circuits-cookbook_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/weevileyekit/</id> <link href="https://leap.tardate.com/electronics101/weevileyekit/"/> <g:image_link>https://leap.tardate.com/electronics101/weevileyekit/assets/weevileyekit_build.jpg</g:image_link> <updated>2022-01-18T02:20:05Z</updated> <title>#617 Weevil Eye Kit</title> <summary>Building a simple but fun light-sensitive DIY kit, a perfect gift for someone learning to solder.</summary> <content type="html"><div><p>Building a simple but fun light-sensitive DIY kit, a perfect gift for someone learning to solder.</p><img src="https://leap.tardate.com/electronics101/weevileyekit/assets/weevileyekit_build.jpg" /></div></content> <category term="LDR"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/candleemulator/</id> <link href="https://leap.tardate.com/electronics101/led/candleemulator/"/> <g:image_link>https://leap.tardate.com/electronics101/led/candleemulator/assets/candleemulator_build.jpg</g:image_link> <updated>2022-01-02T02:12:30Z</updated> <title>#616 Candle Emulator</title> <summary>An Arduino LED candle emulation</summary> <content type="html"><div><p>An Arduino LED candle emulation</p><img src="https://leap.tardate.com/electronics101/led/candleemulator/assets/candleemulator_build.jpg" /></div></content> <category term="LED"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/books/30-arduino-projects-for-the-evil-genius/</id> <link href="https://leap.tardate.com/books/30-arduino-projects-for-the-evil-genius/"/> <g:image_link>https://leap.tardate.com/books/30-arduino-projects-for-the-evil-genius/assets/30-arduino-projects-for-the-evil-genius_build.jpg</g:image_link> <updated>2025-03-12T10:13:00Z</updated> <title>#615 30 Arduino Projects for the Evil Genius</title> <summary>Book notes: 30 Arduino Projects for the Evil Genius, by Simon Monk. First published July 28, 2010.</summary> <content type="html"><div><p>Book notes: 30 Arduino Projects for the Evil Genius, by Simon Monk. First published July 28, 2010.</p><img src="https://leap.tardate.com/books/30-arduino-projects-for-the-evil-genius/assets/30-arduino-projects-for-the-evil-genius_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/arduino-cookbook/</id> <link href="https://leap.tardate.com/books/arduino-cookbook/"/> <g:image_link>https://leap.tardate.com/books/arduino-cookbook/assets/arduino-cookbook_build.jpg</g:image_link> <updated>2025-03-12T09:41:00Z</updated> <title>#614 Arduino Cookbook</title> <summary>Book notes: Arduino Cookbook, by Michael Margolis. First published October 15, 2010.</summary> <content type="html"><div><p>Book notes: Arduino Cookbook, by Michael Margolis. First published October 15, 2010.</p><img src="https://leap.tardate.com/books/arduino-cookbook/assets/arduino-cookbook_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/books/beginning-digital-electronics-through-projects/</id> <link href="https://leap.tardate.com/books/beginning-digital-electronics-through-projects/"/> <g:image_link>https://leap.tardate.com/books/beginning-digital-electronics-through-projects/assets/beginning-digital-electronics-through-projects_build.jpg</g:image_link> <updated>2025-03-12T09:30:00Z</updated> <title>#613 Beginning Digital Electronics through Projects</title> <summary>Book notes: Beginning Digital Electronics through Projects by Andrew Singmin, first published December 1, 2000.</summary> <content type="html"><div><p>Book notes: Beginning Digital Electronics through Projects by Andrew Singmin, first published December 1, 2000.</p><img src="https://leap.tardate.com/books/beginning-digital-electronics-through-projects/assets/beginning-digital-electronics-through-projects_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/equipment/hilologictesterkit/</id> <link href="https://leap.tardate.com/equipment/hilologictesterkit/"/> <g:image_link>https://leap.tardate.com/equipment/hilologictesterkit/assets/hilologictesterkit_build.jpg</g:image_link> <updated>2021-12-03T18:18:39Z</updated> <title>#612 Hi-Lo Logic Tester Kit</title> <summary>Building a neat little hi/low logic indicator kit using a CD4511 and a few passives; also fixing a circuit bug that prevents the power indicator from working.</summary> <content type="html"><div><p>Building a neat little hi/low logic indicator kit using a CD4511 and a few passives; also fixing a circuit bug that prevents the power indicator from working.</p><img src="https://leap.tardate.com/equipment/hilologictesterkit/assets/hilologictesterkit_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Digital Logic"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/dicksonchargepump/halfwave/</id> <link href="https://leap.tardate.com/electronics101/power/dicksonchargepump/halfwave/"/> <g:image_link>https://leap.tardate.com/electronics101/power/dicksonchargepump/halfwave/assets/halfwave_build.jpg</g:image_link> <updated>2021-11-30T02:55:54Z</updated> <title>#611 Half-Wave Dickson Charge Pump</title> <summary>Zener-regulated 12V Dickson Charge Pump driven with Arduino PWM using a single pin.</summary> <content type="html"><div><p>Zener-regulated 12V Dickson Charge Pump driven with Arduino PWM using a single pin.</p><img src="https://leap.tardate.com/electronics101/power/dicksonchargepump/halfwave/assets/halfwave_build.jpg" /></div></content> <category term="Arduino"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/laserray/</id> <link href="https://leap.tardate.com/electronics101/555timer/laserray/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/laserray/assets/laserray_build.jpg</g:image_link> <updated>2021-11-23T14:00:04Z</updated> <title>#610 LaserRay</title> <summary>Testing a laser ray light and sound effectbased on the 555 timer</summary> <content type="html"><div><p>Testing a laser ray light and sound effectbased on the 555 timer</p><img src="https://leap.tardate.com/electronics101/555timer/laserray/assets/laserray_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Audio"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/books/beginning-analog-electronics-through-projects/</id> <link href="https://leap.tardate.com/books/beginning-analog-electronics-through-projects/"/> <g:image_link>https://leap.tardate.com/books/beginning-analog-electronics-through-projects/assets/beginning-analog-electronics-through-projects_build.jpg</g:image_link> <updated>2025-03-12T09:10:00Z</updated> <title>#609 Beginning Analog Electronics through Projects</title> <summary>Book notes: Beginning Analog Electronics through Projects: Second Edition by Andrew Singmin, first published January 1, 2001.</summary> <content type="html"><div><p>Book notes: Beginning Analog Electronics through Projects: Second Edition by Andrew Singmin, first published January 1, 2001.</p><img src="https://leap.tardate.com/books/beginning-analog-electronics-through-projects/assets/beginning-analog-electronics-through-projects_build.jpg" /></div></content> <category term="Books"/> </entry> <entry> <id>https://leap.tardate.com/playground/ledcurrentcontrol/</id> <link href="https://leap.tardate.com/playground/ledcurrentcontrol/"/> <g:image_link>https://leap.tardate.com/playground/ledcurrentcontrol/assets/ledcurrentcontrol_build.jpg</g:image_link> <updated>2021-10-18T01:40:48Z</updated> <title>#608 LED Current Control</title> <summary>Using an Arduino PWM signal for smooth current-controlled LED dimming with a current mirror</summary> <content type="html"><div><p>Using an Arduino PWM signal for smooth current-controlled LED dimming with a current mirror</p><img src="https://leap.tardate.com/playground/ledcurrentcontrol/assets/ledcurrentcontrol_build.jpg" /></div></content> <category term="LED"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd4049/voltagedoubler/</id> <link href="https://leap.tardate.com/electronics101/cd4049/voltagedoubler/"/> <g:image_link>https://leap.tardate.com/electronics101/cd4049/voltagedoubler/assets/voltagedoubler_build.jpg</g:image_link> <updated>2025-03-09T15:18:00Z</updated> <title>#607 CD4049 Voltage Doubler</title> <summary>Testing a voltage doubler circuit based on a CD4049 inverter-driven bucket brigade.</summary> <content type="html"><div><p>Testing a voltage doubler circuit based on a CD4049 inverter-driven bucket brigade.</p><img src="https://leap.tardate.com/electronics101/cd4049/voltagedoubler/assets/voltagedoubler_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="CD4049"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd4049/relaxationoscillator/</id> <link href="https://leap.tardate.com/electronics101/cd4049/relaxationoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/cd4049/relaxationoscillator/assets/relaxationoscillator_build.jpg</g:image_link> <updated>2025-03-09T14:32:00Z</updated> <title>#606 CD4049 Relaxation Oscillator</title> <summary>Testing a simple relaxation oscillator using the CD4049 hex inverter with an RC network.</summary> <content type="html"><div><p>Testing a simple relaxation oscillator using the CD4049 hex inverter with an RC network.</p><img src="https://leap.tardate.com/electronics101/cd4049/relaxationoscillator/assets/relaxationoscillator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="CD4049"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/playground/attiny/analogcomparator/</id> <link href="https://leap.tardate.com/playground/attiny/analogcomparator/"/> <g:image_link>https://leap.tardate.com/playground/attiny/analogcomparator/assets/analogcomparator_build.jpg</g:image_link> <updated>2021-09-16T18:14:44Z</updated> <title>#605 ATtiny Analog Comparator</title> <summary>Testing sound-triggered interrupts with the ATtiny85 built-in analog comparator</summary> <content type="html"><div><p>Testing sound-triggered interrupts with the ATtiny85 built-in analog comparator</p><img src="https://leap.tardate.com/playground/attiny/analogcomparator/assets/analogcomparator_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> <category term="Sensors"/> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/servomotors/minilinearservos/</id> <link href="https://leap.tardate.com/kinetics/servomotors/minilinearservos/"/> <g:image_link>https://leap.tardate.com/kinetics/servomotors/minilinearservos/assets/minilinearservos_build.jpg</g:image_link> <updated>2021-09-16T15:56:04Z</updated> <title>#604 Mini Linear Servos</title> <summary>Testing some mini/micro linear servo motors with an ATtiny85</summary> <content type="html"><div><p>Testing some mini/micro linear servo motors with an ATtiny85</p><img src="https://leap.tardate.com/kinetics/servomotors/minilinearservos/assets/minilinearservos_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> <category term="Servo"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/servomotors/attinyservo/</id> <link href="https://leap.tardate.com/kinetics/servomotors/attinyservo/"/> <g:image_link>https://leap.tardate.com/kinetics/servomotors/attinyservo/assets/attinyservo_build.jpg</g:image_link> <updated>2021-09-14T13:30:20Z</updated> <title>#603 ATTiny Servo Drive</title> <summary>Testing various methods and libraries for driving servo motors with an ATtiny85</summary> <content type="html"><div><p>Testing various methods and libraries for driving servo motors with an ATtiny85</p><img src="https://leap.tardate.com/kinetics/servomotors/attinyservo/assets/attinyservo_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> <category term="Servo"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd40106/voltagemultiplier/</id> <link href="https://leap.tardate.com/electronics101/cd40106/voltagemultiplier/"/> <g:image_link>https://leap.tardate.com/electronics101/cd40106/voltagemultiplier/assets/voltagemultiplier_build.jpg</g:image_link> <updated>2025-03-07T12:55:00Z</updated> <title>#602 CD40106 Inverter Voltage Multiplier</title> <summary>Testing a voltage multiplier circuit based on a CD40106 inverter-driven bucket brigade.</summary> <content type="html"><div><p>Testing a voltage multiplier circuit based on a CD40106 inverter-driven bucket brigade.</p><img src="https://leap.tardate.com/electronics101/cd40106/voltagemultiplier/assets/voltagemultiplier_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="CD40106"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/servomotors/lowpowerminiservos/</id> <link href="https://leap.tardate.com/kinetics/servomotors/lowpowerminiservos/"/> <g:image_link>https://leap.tardate.com/kinetics/servomotors/lowpowerminiservos/assets/lowpowerminiservos_build.jpg</g:image_link> <updated>2021-09-12T08:12:35Z</updated> <title>#601 Low Power Mini Servos</title> <summary>Testing a few low power mini servo motors with an Arduino and MOSFET level shifter</summary> <content type="html"><div><p>Testing a few low power mini servo motors with an Arduino and MOSFET level shifter</p><img src="https://leap.tardate.com/kinetics/servomotors/lowpowerminiservos/assets/lowpowerminiservos_build.jpg" /></div></content> <category term="Servo"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd40106/schmittoscillator/</id> <link href="https://leap.tardate.com/electronics101/cd40106/schmittoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/cd40106/schmittoscillator/assets/schmittoscillator_build.jpg</g:image_link> <updated>2025-03-07T10:01:00Z</updated> <title>#600 CD40106 Schmitt Oscillator</title> <summary>About the CD40106 Hex Inverter with Schmitt Trigger Inputs, and testing its behaviour as a relaxation oscillator square wave generator.</summary> <content type="html"><div><p>About the CD40106 Hex Inverter with Schmitt Trigger Inputs, and testing its behaviour as a relaxation oscillator square wave generator.</p><img src="https://leap.tardate.com/electronics101/cd40106/schmittoscillator/assets/schmittoscillator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="CD40106"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/raspberrypi/bplusgettingstarted/</id> <link href="https://leap.tardate.com/raspberrypi/bplusgettingstarted/"/> <g:image_link>https://leap.tardate.com/raspberrypi/bplusgettingstarted/assets/bplusgettingstarted_build.jpg</g:image_link> <updated>2025-03-05T13:42:00Z</updated> <title>#599 Raspberry Pi B+</title> <summary>Getting Started with the original Raspberry Pi 1 Model B+. Notes on the device, an LED blinky test, running and old NOOBS distro and also the latest Raspberry Pi OS.</summary> <content type="html"><div><p>Getting Started with the original Raspberry Pi 1 Model B+. Notes on the device, an LED blinky test, running and old NOOBS distro and also the latest Raspberry Pi OS.</p><img src="https://leap.tardate.com/raspberrypi/bplusgettingstarted/assets/bplusgettingstarted_build.jpg" /></div></content> <category term="Raspberry Pi"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/temperaturesensors/lm335/</id> <link href="https://leap.tardate.com/electronics101/temperaturesensors/lm335/"/> <g:image_link>https://leap.tardate.com/electronics101/temperaturesensors/lm335/assets/lm335_build.jpg</g:image_link> <updated>2021-03-08T16:42:53Z</updated> <title>#598 LM335 Temperature Sensor</title> <summary>Reading ambient temperature with the LM335 and an Arduino without output display on a Nokia 5110 LCD</summary> <content type="html"><div><p>Reading ambient temperature with the LM335 and an Arduino without output display on a Nokia 5110 LCD</p><img src="https://leap.tardate.com/electronics101/temperaturesensors/lm335/assets/lm335_build.jpg" /></div></content> <category term="Sensors"/> <category term="LM335"/> <category term="LCD"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/wirelessled/</id> <link href="https://leap.tardate.com/electronics101/power/wirelessled/"/> <g:image_link>https://leap.tardate.com/electronics101/power/wirelessled/assets/wirelessled_build.jpg</g:image_link> <updated>2021-08-19T14:19:11Z</updated> <title>#597 Simple Wireless Power LED</title> <summary>Researching wireless power transmission and building a simpel wirelessly-powered LED demonstration</summary> <content type="html"><div><p>Researching wireless power transmission and building a simpel wirelessly-powered LED demonstration</p><img src="https://leap.tardate.com/electronics101/power/wirelessled/assets/wirelessled_build.jpg" /></div></content> <category term="Power"/> <category term="Wireless"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/piezobuzzers/opampdriver/</id> <link href="https://leap.tardate.com/electronics101/piezobuzzers/opampdriver/"/> <g:image_link>https://leap.tardate.com/electronics101/piezobuzzers/opampdriver/assets/opampdriver_build.jpg</g:image_link> <updated>2021-08-17T08:14:50Z</updated> <title>#596 OpAmp Piezo Driver</title> <summary>Testing a circuit for driving a piezoelectric transducer for sound output with a TL072 opamp oscillator</summary> <content type="html"><div><p>Testing a circuit for driving a piezoelectric transducer for sound output with a TL072 opamp oscillator</p><img src="https://leap.tardate.com/electronics101/piezobuzzers/opampdriver/assets/opampdriver_build.jpg" /></div></content> <category term="Oscillators"/> <category term="Crystal"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/temperaturesensors/lm35/</id> <link href="https://leap.tardate.com/electronics101/temperaturesensors/lm35/"/> <g:image_link>https://leap.tardate.com/electronics101/temperaturesensors/lm35/assets/lm35_build.jpg</g:image_link> <updated>2021-08-15T13:42:05Z</updated> <title>#595 LM35 Temperature Sensor</title> <summary>Reading ambient temperature with the LM35 and an Arduino without output display on a Nokia 5110 LCD</summary> <content type="html"><div><p>Reading ambient temperature with the LM35 and an Arduino without output display on a Nokia 5110 LCD</p><img src="https://leap.tardate.com/electronics101/temperaturesensors/lm35/assets/lm35_build.jpg" /></div></content> <category term="Sensors"/> <category term="LM35"/> <category term="LCD"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/breadboardbling/terminalblocks/</id> <link href="https://leap.tardate.com/electronics101/breadboardbling/terminalblocks/"/> <g:image_link>https://leap.tardate.com/electronics101/breadboardbling/terminalblocks/assets/terminalblocks_build.jpg</g:image_link> <updated>2025-02-26T08:07:00Z</updated> <title>#594 Terminal Blocks</title> <summary>Making some breadboard-compatible terminal blocks for securely connecting random wired devices in circuit.</summary> <content type="html"><div><p>Making some breadboard-compatible terminal blocks for securely connecting random wired devices in circuit.</p><img src="https://leap.tardate.com/electronics101/breadboardbling/terminalblocks/assets/terminalblocks_build.jpg" /></div></content> <category term="Breadboard Bling"/> <category term="Connectors"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/74hc14/voltagemultiplier/</id> <link href="https://leap.tardate.com/electronics101/74hc14/voltagemultiplier/"/> <g:image_link>https://leap.tardate.com/electronics101/74hc14/voltagemultiplier/assets/voltagemultiplier_build.jpg</g:image_link> <updated>2025-02-25T09:40:00Z</updated> <title>#593 74HC14 Inverter Voltage Multiplier</title> <summary>Testing a voltage multiplier circuit based on a 74HC14 inverter-driven bucket brigade</summary> <content type="html"><div><p>Testing a voltage multiplier circuit based on a 74HC14 inverter-driven bucket brigade</p><img src="https://leap.tardate.com/electronics101/74hc14/voltagemultiplier/assets/voltagemultiplier_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="74HC14"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/kraft/snowflake/lamp/</id> <link href="https://leap.tardate.com/kraft/snowflake/lamp/"/> <g:image_link>https://leap.tardate.com/kraft/snowflake/lamp/assets/lamp_build.jpg</g:image_link> <updated>2021-07-21T00:49:00Z</updated> <title>#592 Snowflake Lamp</title> <summary>Finding a new home for some @LuckyResistor Snow Flake boards in a lamp stand</summary> <content type="html"><div><p>Finding a new home for some @LuckyResistor Snow Flake boards in a lamp stand</p><img src="https://leap.tardate.com/kraft/snowflake/lamp/assets/lamp_build.jpg" /></div></content> <category term="Craft"/> <category term="ARM"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/kraft/tydiriumstrobe/module/</id> <link href="https://leap.tardate.com/kraft/tydiriumstrobe/module/"/> <g:image_link>https://leap.tardate.com/kraft/tydiriumstrobe/module/assets/module_build.jpg</g:image_link> <updated>2021-04-05T08:52:23Z</updated> <title>#591 Tydirium Strobe Module</title> <summary>Packaging the ATtiny85 Lambda-class shuttle Tydirium navigation strobe circuit as a small board that can be added to an existing lighting setup.</summary> <content type="html"><div><p>Packaging the ATtiny85 Lambda-class shuttle Tydirium navigation strobe circuit as a small board that can be added to an existing lighting setup.</p><img src="https://leap.tardate.com/kraft/tydiriumstrobe/module/assets/module_build.jpg" /></div></content> <category term="Arduino"/> <category term="ATmel"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/74hc04/relaxationoscillator/</id> <link href="https://leap.tardate.com/electronics101/74hc04/relaxationoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/74hc04/relaxationoscillator/assets/relaxationoscillator_build.jpg</g:image_link> <updated>2025-02-25T07:34:00Z</updated> <title>#590 74HC04 Relaxation Oscillator</title> <summary>Testing a simple relaxation oscillator using the 74HC04 hex inverter with an RC network.</summary> <content type="html"><div><p>Testing a simple relaxation oscillator using the 74HC04 hex inverter with an RC network.</p><img src="https://leap.tardate.com/electronics101/74hc04/relaxationoscillator/assets/relaxationoscillator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="74HC04"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/kraft/tydiriumstrobe/</id> <link href="https://leap.tardate.com/kraft/tydiriumstrobe/"/> <g:image_link>https://leap.tardate.com/kraft/tydiriumstrobe/assets/tydiriumstrobe_build.jpg</g:image_link> <updated>2021-04-05T08:52:23Z</updated> <title>#589 Tydirium Strobe</title> <summary>Figuring out the navigation light strobe frequency of the Lambda-class shuttle Tydirium and building a freeform circuit sculpture to demonstrate the effects (running an ATtiny85 on 3V)</summary> <content type="html"><div><p>Figuring out the navigation light strobe frequency of the Lambda-class shuttle Tydirium and building a freeform circuit sculpture to demonstrate the effects (running an ATtiny85 on 3V)</p><img src="https://leap.tardate.com/kraft/tydiriumstrobe/assets/tydiriumstrobe_build.jpg" /></div></content> <category term="Arduino"/> <category term="ATmel"/> <category term="LED"/> <category term="Circuit Sculpture"/> <category term="Freeform"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/74hc14/schmittoscillator/</id> <link href="https://leap.tardate.com/electronics101/74hc14/schmittoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/74hc14/schmittoscillator/assets/schmittoscillator_build.jpg</g:image_link> <updated>2025-02-25T06:16:00Z</updated> <title>#588 74HC14 Schmitt Oscillator</title> <summary>About the 74HC14 Hex Inverter with Schmitt Trigger Inputs, and testing its behaviour as a relaxation oscillator square wave generator.</summary> <content type="html"><div><p>About the 74HC14 Hex Inverter with Schmitt Trigger Inputs, and testing its behaviour as a relaxation oscillator square wave generator.</p><img src="https://leap.tardate.com/electronics101/74hc14/schmittoscillator/assets/schmittoscillator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="74HC14"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/playground/rgbohmmeter/</id> <link href="https://leap.tardate.com/playground/rgbohmmeter/"/> <g:image_link>https://leap.tardate.com/playground/rgbohmmeter/assets/rgbohmmeter_build.jpg</g:image_link> <updated>2021-03-17T17:54:50Z</updated> <title>#587 RGB Auto-ranging Ohmmeter</title> <summary>An auto-ranging ohmmeter that uses an LCD and RGB LEDs to display the best-matched E24 standard resistor color code for the measured resistance</summary> <content type="html"><div><p>An auto-ranging ohmmeter that uses an LCD and RGB LEDs to display the best-matched E24 standard resistor color code for the measured resistance</p><img src="https://leap.tardate.com/playground/rgbohmmeter/assets/rgbohmmeter_build.jpg" /></div></content> <category term="Arduino"/> <category term="LED"/> <category term="Sensors"/> </entry> <entry> <id>https://leap.tardate.com/esp8266/rgbledfiddler/</id> <link href="https://leap.tardate.com/esp8266/rgbledfiddler/"/> <g:image_link>https://leap.tardate.com/esp8266/rgbledfiddler/assets/rgbledfiddler_build.jpg</g:image_link> <updated>2021-03-16T14:01:52Z</updated> <title>#586 RGB LED Fiddler</title> <summary>Using an HTML5 color picker on a web page hosted from an ESP8266 module (ESP12) to fine tune the color settings for an RGB LED.</summary> <content type="html"><div><p>Using an HTML5 color picker on a web page hosted from an ESP8266 module (ESP12) to fine tune the color settings for an RGB LED.</p><img src="https://leap.tardate.com/esp8266/rgbledfiddler/assets/rgbledfiddler_build.jpg" /></div></content> <category term="LED"/> <category term="ESP8266"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ds1822/</id> <link href="https://leap.tardate.com/electronics101/ds1822/"/> <g:image_link>https://leap.tardate.com/electronics101/ds1822/assets/ds1822_build.jpg</g:image_link> <updated>2021-03-09T15:25:47Z</updated> <title>#585 DS1822 1-Wire Reading</title> <summary>Basic interrogation of a DS1822 using 1-wire protocol and results display on a Nokia 5110 LCD</summary> <content type="html"><div><p>Basic interrogation of a DS1822 using 1-wire protocol and results display on a Nokia 5110 LCD</p><img src="https://leap.tardate.com/electronics101/ds1822/assets/ds1822_build.jpg" /></div></content> <category term="Sensors"/> <category term="Arduino"/> <category term="LCD"/> <category term="DS1822"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/hpdl1414/</id> <link href="https://leap.tardate.com/electronics101/led/hpdl1414/"/> <g:image_link>https://leap.tardate.com/electronics101/led/hpdl1414/assets/hpdl1414_build.jpg</g:image_link> <updated>2021-03-03T13:07:35Z</updated> <title>#584 HPDL1414</title> <summary>Test driving a retro HPDL-1414 4-digit GaAsP display with an Arduino</summary> <content type="html"><div><p>Test driving a retro HPDL-1414 4-digit GaAsP display with an Arduino</p><img src="https://leap.tardate.com/electronics101/led/hpdl1414/assets/hpdl1414_build.jpg" /></div></content> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/ysj181222/</id> <link href="https://leap.tardate.com/electronics101/led/ysj181222/"/> <g:image_link>https://leap.tardate.com/electronics101/led/ysj181222/assets/ysj181222_build.jpg</g:image_link> <updated>2021-03-02T14:57:52Z</updated> <title>#583 LED Sequencer Module</title> <summary>Testing a simple 6xLED sequencer module (YuSiJie 宇思捷 YSJ181222)</summary> <content type="html"><div><p>Testing a simple 6xLED sequencer module (YuSiJie 宇思捷 YSJ181222)</p><img src="https://leap.tardate.com/electronics101/led/ysj181222/assets/ysj181222_build.jpg" /></div></content> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/74ls14/schmittoscillator/</id> <link href="https://leap.tardate.com/electronics101/74ls14/schmittoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/74ls14/schmittoscillator/assets/schmittoscillator_build.jpg</g:image_link> <updated>2025-02-25T04:03:00Z</updated> <title>#582 74LS14 Schmitt Oscillator</title> <summary>About the 74LS14 Hex Inverter with Schmitt Trigger Inputs, and testing its behaviour as a relaxation oscillator square wave generator</summary> <content type="html"><div><p>About the 74LS14 Hex Inverter with Schmitt Trigger Inputs, and testing its behaviour as a relaxation oscillator square wave generator</p><img src="https://leap.tardate.com/electronics101/74ls14/schmittoscillator/assets/schmittoscillator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="74LS14"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/notebook/calculators/</id> <link href="https://leap.tardate.com/notebook/calculators/"/> <g:image_link>https://leap.tardate.com/notebook/calculators/assets/calculators_build.jpg</g:image_link> <updated>2025-02-20T15:43:00Z</updated> <title>#581 Calculators</title> <summary>Catalog of online tools for electrical and electronic conversion, identification and calculation.</summary> <content type="html"><div><p>Catalog of online tools for electrical and electronic conversion, identification and calculation.</p><img src="https://leap.tardate.com/notebook/calculators/assets/calculators_build.jpg" /></div></content> <category term="Notebook"/> </entry> <entry> <id>https://leap.tardate.com/notebook/logic_families/</id> <link href="https://leap.tardate.com/notebook/logic_families/"/> <g:image_link>https://leap.tardate.com/notebook/logic_families/assets/logic_families_build.jpg</g:image_link> <updated>2025-02-20T07:34:00Z</updated> <title>#580 Digital Logic Families</title> <summary>My personal notebook on digital logic families, chip listings, and reference sources</summary> <content type="html"><div><p>My personal notebook on digital logic families, chip listings, and reference sources</p><img src="https://leap.tardate.com/notebook/logic_families/assets/logic_families_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Notebook"/> </entry> <entry> <id>https://leap.tardate.com/notebook/pcb_fab/</id> <link href="https://leap.tardate.com/notebook/pcb_fab/"/> <g:image_link>https://leap.tardate.com/notebook/pcb_fab/assets/pcb_fab_build.jpg</g:image_link> <updated>2025-02-20T07:34:00Z</updated> <title>#579 PCB Fabrication</title> <summary>My personal notebook on PCB fabrication options</summary> <content type="html"><div><p>My personal notebook on PCB fabrication options</p><img src="https://leap.tardate.com/notebook/pcb_fab/assets/pcb_fab_build.jpg" /></div></content> <category term="PCB Design"/> <category term="Notebook"/> </entry> <entry> <id>https://leap.tardate.com/notebook/arduino/</id> <link href="https://leap.tardate.com/notebook/arduino/"/> <g:image_link>https://leap.tardate.com/notebook/arduino/assets/arduino_build.jpg</g:image_link> <updated>2025-02-20T07:34:00Z</updated> <title>#578 Arduino Tech Notes</title> <summary>My personal notebook on Arduino technical information and references</summary> <content type="html"><div><p>My personal notebook on Arduino technical information and references</p><img src="https://leap.tardate.com/notebook/arduino/assets/arduino_build.jpg" /></div></content> <category term="Arduino"/> <category term="Notebook"/> </entry> <entry> <id>https://leap.tardate.com/notebook/</id> <link href="https://leap.tardate.com/notebook/"/> <g:image_link>https://leap.tardate.com/notebook/assets/notebook_build.jpg</g:image_link> <updated>2025-02-20T07:34:00Z</updated> <title>#577 Notebook</title> <summary>My personal electronics notebook of reference materials and other information</summary> <content type="html"><div><p>My personal electronics notebook of reference materials and other information</p><img src="https://leap.tardate.com/notebook/assets/notebook_build.jpg" /></div></content> <category term="Notebook"/> </entry> <entry> <id>https://leap.tardate.com/equipment/spraybooth/</id> <link href="https://leap.tardate.com/equipment/spraybooth/"/> <g:image_link>https://leap.tardate.com/equipment/spraybooth/assets/spraybooth_build.jpg</g:image_link> <updated>2020-12-20T11:52:28Z</updated> <title>#576 Spray Booth</title> <summary>Building a $10 spray booth for light airbrush spray painting and soldering</summary> <content type="html"><div><p>Building a $10 spray booth for light airbrush spray painting and soldering</p><img src="https://leap.tardate.com/equipment/spraybooth/assets/spraybooth_build.jpg" /></div></content> <category term="Tools"/> </entry> <entry> <id>https://leap.tardate.com/audio/motorizedmusicbox/</id> <link href="https://leap.tardate.com/audio/motorizedmusicbox/"/> <g:image_link>https://leap.tardate.com/audio/motorizedmusicbox/assets/motorizedmusicbox_build.jpg</g:image_link> <updated>2020-12-20T15:24:10Z</updated> <title>#575 Motorized Music Box</title> <summary>A quick test of motorizing a hand-cranked music box</summary> <content type="html"><div><p>A quick test of motorizing a hand-cranked music box</p><img src="https://leap.tardate.com/audio/motorizedmusicbox/assets/motorizedmusicbox_build.jpg" /></div></content> <category term="Audio"/> <category term="Motors"/> </entry> <entry> <id>https://leap.tardate.com/audio/microsd/waveplayer/</id> <link href="https://leap.tardate.com/audio/microsd/waveplayer/"/> <g:image_link>https://leap.tardate.com/audio/microsd/waveplayer/assets/waveplayer_build.jpg</g:image_link> <updated>2020-12-16T15:15:28Z</updated> <title>#574 MicroSD WAV Player</title> <summary>A basic demonstration of playing a sound file (WAV) from an SD card with an Arduino</summary> <content type="html"><div><p>A basic demonstration of playing a sound file (WAV) from an SD card with an Arduino</p><img src="https://leap.tardate.com/audio/microsd/waveplayer/assets/waveplayer_build.jpg" /></div></content> <category term="Audio"/> <category term="Arduino"/> <category term="SD"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/pwmmotorcontrol/</id> <link href="https://leap.tardate.com/electronics101/555timer/pwmmotorcontrol/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/pwmmotorcontrol/assets/pwmmotorcontrol_build.jpg</g:image_link> <updated>2020-11-20T14:41:46Z</updated> <title>#573 555 PWM Motor Control</title> <summary>Testing small DC motor control with a 555 time PWM signal</summary> <content type="html"><div><p>Testing small DC motor control with a 555 time PWM signal</p><img src="https://leap.tardate.com/electronics101/555timer/pwmmotorcontrol/assets/pwmmotorcontrol_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Motors"/> </entry> <entry> <id>https://leap.tardate.com/equipment/powermeter/</id> <link href="https://leap.tardate.com/equipment/powermeter/"/> <g:image_link>https://leap.tardate.com/equipment/powermeter/assets/powermeter_build.jpg</g:image_link> <updated>2020-01-29T00:25:48Z</updated> <title>#572 PowerMeter</title> <summary>A voltage, current and power meter using the INA226, with an ATtiny85 driving the process and displaying measurements to a 128X32 OLED display.</summary> <content type="html"><div><p>A voltage, current and power meter using the INA226, with an ATtiny85 driving the process and displaying measurements to a 128X32 OLED display.</p><img src="https://leap.tardate.com/equipment/powermeter/assets/powermeter_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> <category term="INA226"/> <category term="Sensors"/> </entry> <entry> <id>https://leap.tardate.com/equipment/tracetogethertoken/</id> <link href="https://leap.tardate.com/equipment/tracetogethertoken/"/> <g:image_link>https://leap.tardate.com/equipment/tracetogethertoken/assets/tracetogethertoken_build.jpg</g:image_link> <updated>2020-11-07T08:31:18Z</updated> <title>#571 TraceTogether Token</title> <summary>Learning about the Singapore Government's latest BLE TraceTogether Token for pandemic contact tracing, and sniffing the adveritsements with a little bit of Swift code</summary> <content type="html"><div><p>Learning about the Singapore Government's latest BLE TraceTogether Token for pandemic contact tracing, and sniffing the adveritsements with a little bit of Swift code</p><img src="https://leap.tardate.com/equipment/tracetogethertoken/assets/tracetogethertoken_build.jpg" /></div></content> <category term="BLE"/> <category term="ARM"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mt3608/breadboarded/</id> <link href="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mt3608/breadboarded/"/> <g:image_link>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mt3608/breadboarded/assets/breadboarded_build.jpg</g:image_link> <updated>2020-10-09T15:28:17Z</updated> <title>#570 MT3608 on a Breadboard</title> <summary>A quick breadboard test of the canonical MT3608 switch mode power supply boost converter circuit</summary> <content type="html"><div><p>A quick breadboard test of the canonical MT3608 switch mode power supply boost converter circuit</p><img src="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mt3608/breadboarded/assets/breadboarded_build.jpg" /></div></content> <category term="Power"/> <category term="SMPS"/> </entry> <entry> <id>https://leap.tardate.com/playground/power/multivoltagegpio/</id> <link href="https://leap.tardate.com/playground/power/multivoltagegpio/"/> <g:image_link>https://leap.tardate.com/playground/power/multivoltagegpio/assets/multivoltagegpio_build.jpg</g:image_link> <updated>2020-10-04T17:44:45Z</updated> <title>#569 Multi-voltage GPIO</title> <summary>A PWM charge-pump approach for driving low-current 0V, 5V, 12V output levels from an Arduino GPIO pin</summary> <content type="html"><div><p>A PWM charge-pump approach for driving low-current 0V, 5V, 12V output levels from an Arduino GPIO pin</p><img src="https://leap.tardate.com/playground/power/multivoltagegpio/assets/multivoltagegpio_build.jpg" /></div></content> <category term="Arduino"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/equipment/beeplogicprobe/</id> <link href="https://leap.tardate.com/equipment/beeplogicprobe/"/> <g:image_link>https://leap.tardate.com/equipment/beeplogicprobe/assets/beeplogicprobe_build.jpg</g:image_link> <updated>2020-09-28T16:42:29Z</updated> <title>#568 Beep Logic Probe</title> <summary>Building a logic probe with audio and LED feedback, based on a design from Elektor magazine January/February 2015</summary> <content type="html"><div><p>Building a logic probe with audio and LED feedback, based on a design from Elektor magazine January/February 2015</p><img src="https://leap.tardate.com/equipment/beeplogicprobe/assets/beeplogicprobe_build.jpg" /></div></content> <category term="Digital Logic"/> <category term="CMOS/TTL"/> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/radio/randomcodepractice/</id> <link href="https://leap.tardate.com/radio/randomcodepractice/"/> <g:image_link>https://leap.tardate.com/radio/randomcodepractice/assets/randomcodepractice_build.jpg</g:image_link> <updated>2020-09-22T14:29:52Z</updated> <title>#567 Random Code Practice</title> <summary>A simple Morse code practice generator that prints the character and sounds the dit-dahs to a speaker. Based on a project by Glen Popiel KW5GP.</summary> <content type="html"><div><p>A simple Morse code practice generator that prints the character and sounds the dit-dahs to a speaker. Based on a project by Glen Popiel KW5GP.</p><img src="https://leap.tardate.com/radio/randomcodepractice/assets/randomcodepractice_build.jpg" /></div></content> <category term="Radio"/> <category term="CW"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitallogic/4bitsynchonouscounter/</id> <link href="https://leap.tardate.com/electronics101/digitallogic/4bitsynchonouscounter/"/> <g:image_link>https://leap.tardate.com/electronics101/digitallogic/4bitsynchonouscounter/assets/4bitsynchonouscounter_build.jpg</g:image_link> <updated>2020-09-20T09:59:32Z</updated> <title>#566 4-bit Synchonous Counter</title> <summary>An example 4-bit synchronous counter with tri-state output, and controls for: count enable, output enable, number load, and clear</summary> <content type="html"><div><p>An example 4-bit synchronous counter with tri-state output, and controls for: count enable, output enable, number load, and clear</p><img src="https://leap.tardate.com/electronics101/digitallogic/4bitsynchonouscounter/assets/4bitsynchonouscounter_build.jpg" /></div></content> <category term="74LS161"/> <category term="74LS245"/> <category term="Digital Logic"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/breadboardbling/singleshottrigger/</id> <link href="https://leap.tardate.com/electronics101/breadboardbling/singleshottrigger/"/> <g:image_link>https://leap.tardate.com/electronics101/breadboardbling/singleshottrigger/assets/singleshottrigger_build.jpg</g:image_link> <updated>2020-09-20T15:35:54Z</updated> <title>#565 Single-Shot Trigger</title> <summary>A debounced single-shot pulse generator with inverted and non-inverted output designed for use on a breadboard</summary> <content type="html"><div><p>A debounced single-shot pulse generator with inverted and non-inverted output designed for use on a breadboard</p><img src="https://leap.tardate.com/electronics101/breadboardbling/singleshottrigger/assets/singleshottrigger_build.jpg" /></div></content> <category term="Breadboard Bling"/> <category term="555 Timer"/> <category term="CD4049"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/dualmodevariablefrequencyorduty/usblinky/</id> <link href="https://leap.tardate.com/electronics101/555timer/dualmodevariablefrequencyorduty/usblinky/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/dualmodevariablefrequencyorduty/usblinky/assets/usblinky_build.jpg</g:image_link> <updated>2020-10-02T13:12:45Z</updated> <title>#564 USB Blinky Toy</title> <summary>A curiously hypnotic USB blinky demonstration of a variable frequency/variable duty 555 timer circuit</summary> <content type="html"><div><p>A curiously hypnotic USB blinky demonstration of a variable frequency/variable duty 555 timer circuit</p><img src="https://leap.tardate.com/electronics101/555timer/dualmodevariablefrequencyorduty/usblinky/assets/usblinky_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Oscillators"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/dualmodevariablefrequencyorduty/</id> <link href="https://leap.tardate.com/electronics101/555timer/dualmodevariablefrequencyorduty/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/dualmodevariablefrequencyorduty/assets/dualmodevariablefrequencyorduty_build.jpg</g:image_link> <updated>2020-09-17T15:17:41Z</updated> <title>#563 Dual Variable Mode Oscillator</title> <summary>Testing a 555 timer astable oscillator circuit that can be switched between variable duty cycle and variable frequency</summary> <content type="html"><div><p>Testing a 555 timer astable oscillator circuit that can be switched between variable duty cycle and variable frequency</p><img src="https://leap.tardate.com/electronics101/555timer/dualmodevariablefrequencyorduty/assets/dualmodevariablefrequencyorduty_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitallogic/1bitregister/</id> <link href="https://leap.tardate.com/electronics101/digitallogic/1bitregister/"/> <g:image_link>https://leap.tardate.com/electronics101/digitallogic/1bitregister/assets/1bitregister_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#562 1-bit Register</title> <summary>Building a basic manually controlled 1-bit register that demonstrates the key features of a digital register</summary> <content type="html"><div><p>Building a basic manually controlled 1-bit register that demonstrates the key features of a digital register</p><img src="https://leap.tardate.com/electronics101/digitallogic/1bitregister/assets/1bitregister_build.jpg" /></div></content> <category term="Digital Logic"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/batterymanagement/aguhajsu1s3a/</id> <link href="https://leap.tardate.com/electronics101/batterymanagement/aguhajsu1s3a/"/> <g:image_link>https://leap.tardate.com/electronics101/batterymanagement/aguhajsu1s3a/assets/aguhajsu1s3a_build.jpg</g:image_link> <updated>2020-07-21T18:01:16Z</updated> <title>#561 Aguhajsu 1S/3A BMS</title> <summary>Reviewing and testing the Aguhajsu 1S 3A battery protection module for a single 18650 lithium-ion cell</summary> <content type="html"><div><p>Reviewing and testing the Aguhajsu 1S 3A battery protection module for a single 18650 lithium-ion cell</p><img src="https://leap.tardate.com/electronics101/batterymanagement/aguhajsu1s3a/assets/aguhajsu1s3a_build.jpg" /></div></content> <category term="Power"/> <category term="BMS"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/simple555tester/</id> <link href="https://leap.tardate.com/electronics101/555timer/simple555tester/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/simple555tester/assets/simple555tester_build.jpg</g:image_link> <updated>2025-01-31T16:26:00Z</updated> <title>#560 Simple 555 Tester</title> <summary>Testing a simple 555 project published in Elektor Jul-1980. The circuit uses an astable configuration to verify the performance of a 555 timer chip.</summary> <content type="html"><div><p>Testing a simple 555 project published in Elektor Jul-1980. The circuit uses an astable configuration to verify the performance of a 555 timer chip.</p><img src="https://leap.tardate.com/electronics101/555timer/simple555tester/assets/simple555tester_build.jpg" /></div></content> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/slowglow/</id> <link href="https://leap.tardate.com/electronics101/555timer/slowglow/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/slowglow/assets/slowglow_build.jpg</g:image_link> <updated>2020-09-05T09:30:44Z</updated> <title>#559 Slow Glow</title> <summary>A simple slowly-glowing LED effect using a 555 timer</summary> <content type="html"><div><p>A simple slowly-glowing LED effect using a 555 timer</p><img src="https://leap.tardate.com/electronics101/555timer/slowglow/assets/slowglow_build.jpg" /></div></content> <category term="555 Timer"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/esp8266/serialtest/python/</id> <link href="https://leap.tardate.com/esp8266/serialtest/python/"/> <g:image_link>https://leap.tardate.com/esp8266/serialtest/python/assets/python_build.jpg</g:image_link> <updated>2025-01-26T13:18:00Z</updated> <title>#558 ESP8266 SerialTest (python)</title> <summary>exercising ESP8266 serial communications with Python</summary> <content type="html"><div><p>exercising ESP8266 serial communications with Python</p><img src="https://leap.tardate.com/esp8266/serialtest/python/assets/python_build.jpg" /></div></content> <category term="ESP8266"/> <category term="python"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/led8x8module/</id> <link href="https://leap.tardate.com/electronics101/led/led8x8module/"/> <g:image_link>https://leap.tardate.com/electronics101/led/led8x8module/assets/led8x8module_build.jpg</g:image_link> <updated>2020-06-30T18:33:35Z</updated> <title>#557 LED 8x8 Module</title> <summary>Building and using an 8x8 LED matrix with MAX7219 driver module</summary> <content type="html"><div><p>Building and using an 8x8 LED matrix with MAX7219 driver module</p><img src="https://leap.tardate.com/electronics101/led/led8x8module/assets/led8x8module_build.jpg" /></div></content> <category term="LED 8x8"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/srlatch/</id> <link href="https://leap.tardate.com/electronics101/555timer/srlatch/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/srlatch/assets/srlatch_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#556 555 SR Latch</title> <summary>Set/Reset latch with a 555 timer</summary> <content type="html"><div><p>Set/Reset latch with a 555 timer</p><img src="https://leap.tardate.com/electronics101/555timer/srlatch/assets/srlatch_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Digital Logic"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/beatbot/</id> <link href="https://leap.tardate.com/electronics101/555timer/beatbot/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/beatbot/assets/beatbot_build.jpg</g:image_link> <updated>2020-05-31T05:01:55Z</updated> <title>#555 Beat Bot</title> <summary>A silly little @MaywaDenki-inspired critter using multiple 555 timers and a CD4017 to play and dance to a tune</summary> <content type="html"><div><p>A silly little @MaywaDenki-inspired critter using multiple 555 timers and a CD4017 to play and dance to a tune</p><img src="https://leap.tardate.com/electronics101/555timer/beatbot/assets/beatbot_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Kinetics"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioeffects/jetengine/</id> <link href="https://leap.tardate.com/audio/audioeffects/jetengine/"/> <g:image_link>https://leap.tardate.com/audio/audioeffects/jetengine/assets/jetengine_build.jpg</g:image_link> <updated>2020-06-13T16:34:25Z</updated> <title>#554 Jet Engine Startup Effect</title> <summary>Fine tuning an analog jet engine startup sound simulation, using a zener noise generator and CD4046 VCO</summary> <content type="html"><div><p>Fine tuning an analog jet engine startup sound simulation, using a zener noise generator and CD4046 VCO</p><img src="https://leap.tardate.com/audio/audioeffects/jetengine/assets/jetengine_build.jpg" /></div></content> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/arm/1bitsy/baremetalblinky/</id> <link href="https://leap.tardate.com/arm/1bitsy/baremetalblinky/"/> <g:image_link>https://leap.tardate.com/arm/1bitsy/baremetalblinky/assets/baremetalblinky_build.jpg</g:image_link> <updated>2020-06-11T13:13:06Z</updated> <title>#553 1bitsy Bare Metal C</title> <summary>Bare metal programming the 1bitsy STM32F415RGT6 by hand with gcc and the Black Magic Probe</summary> <content type="html"><div><p>Bare metal programming the 1bitsy STM32F415RGT6 by hand with gcc and the Black Magic Probe</p><img src="https://leap.tardate.com/arm/1bitsy/baremetalblinky/assets/baremetalblinky_build.jpg" /></div></content> <category term="STM32"/> <category term="C"/> <category term="ARM"/> <category term="JTAG"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/aircraftnavigationlights/</id> <link href="https://leap.tardate.com/electronics101/555timer/aircraftnavigationlights/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/aircraftnavigationlights/assets/aircraftnavigationlights_build.jpg</g:image_link> <updated>2021-09-15T17:44:20Z</updated> <title>#552 Freeform Popsicle Airways</title> <summary>Demonstrating a simple aircraft navigation beacon sequence implemented with a couple of 555 timers</summary> <content type="html"><div><p>Demonstrating a simple aircraft navigation beacon sequence implemented with a couple of 555 timers</p><img src="https://leap.tardate.com/electronics101/555timer/aircraftnavigationlights/assets/aircraftnavigationlights_build.jpg" /></div></content> <category term="LED"/> <category term="555 Timer"/> <category term="Circuit Sculpture"/> <category term="Freeform"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioeffectschips/sn76477/propplane/</id> <link href="https://leap.tardate.com/audio/audioeffectschips/sn76477/propplane/"/> <g:image_link>https://leap.tardate.com/audio/audioeffectschips/sn76477/propplane/assets/propplane_build.jpg</g:image_link> <updated>2020-05-25T08:56:33Z</updated> <title>#551 SN76477 Prop Plane</title> <summary>Testing the SN76477 propeller plane sound effect configuration</summary> <content type="html"><div><p>Testing the SN76477 propeller plane sound effect configuration</p><img src="https://leap.tardate.com/audio/audioeffectschips/sn76477/propplane/assets/propplane_build.jpg" /></div></content> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/equipment/blackmagicprobe/</id> <link href="https://leap.tardate.com/equipment/blackmagicprobe/"/> <g:image_link>https://leap.tardate.com/equipment/blackmagicprobe/assets/blackmagicprobe_build.jpg</g:image_link> <updated>2020-05-24T09:38:07Z</updated> <title>#550 Black Magic Probe</title> <summary>Using the Black Magic Probe for debugging ARM/STM32 devices over JTAG and SWD, with a demonstration on MacOSX</summary> <content type="html"><div><p>Using the Black Magic Probe for debugging ARM/STM32 devices over JTAG and SWD, with a demonstration on MacOSX</p><img src="https://leap.tardate.com/equipment/blackmagicprobe/assets/blackmagicprobe_build.jpg" /></div></content> <category term="ARM"/> <category term="JTAG"/> <category term="SWD"/> </entry> <entry> <id>https://leap.tardate.com/arm/stm32f103c8t6/baremetal/</id> <link href="https://leap.tardate.com/arm/stm32f103c8t6/baremetal/"/> <g:image_link>https://leap.tardate.com/arm/stm32f103c8t6/baremetal/assets/baremetal_build.jpg</g:image_link> <updated>2020-05-24T09:47:27Z</updated> <title>#549 Bare Metal C on the Blue Pill</title> <summary>Bare metal programming the STM32F103C8T6 (as used in the Blue Pill) by hand with gcc and the stlink open source STM32 MCU programming toolset</summary> <content type="html"><div><p>Bare metal programming the STM32F103C8T6 (as used in the Blue Pill) by hand with gcc and the stlink open source STM32 MCU programming toolset</p><img src="https://leap.tardate.com/arm/stm32f103c8t6/baremetal/assets/baremetal_build.jpg" /></div></content> <category term="STM32"/> <category term="C"/> </entry> <entry> <id>https://leap.tardate.com/arm/stm32f103c8t6/bluepill/debugwithstlink/</id> <link href="https://leap.tardate.com/arm/stm32f103c8t6/bluepill/debugwithstlink/"/> <g:image_link>https://leap.tardate.com/arm/stm32f103c8t6/bluepill/debugwithstlink/assets/debugwithstlink_build.jpg</g:image_link> <updated>2020-05-24T09:47:27Z</updated> <title>#548 Debug Arduino STM32 with stlink</title> <summary>Using gdb and the stlink open source STM32 MCU programming toolset to debug code built and uploaded using the Arduino IDE on MacOSX</summary> <content type="html"><div><p>Using gdb and the stlink open source STM32 MCU programming toolset to debug code built and uploaded using the Arduino IDE on MacOSX</p><img src="https://leap.tardate.com/arm/stm32f103c8t6/bluepill/debugwithstlink/assets/debugwithstlink_build.jpg" /></div></content> <category term="STM32"/> <category term="gdb"/> <category term="stlink"/> </entry> <entry> <id>https://leap.tardate.com/arm/stm32f103c8t6/bluepill/usingstlink/</id> <link href="https://leap.tardate.com/arm/stm32f103c8t6/bluepill/usingstlink/"/> <g:image_link>https://leap.tardate.com/arm/stm32f103c8t6/bluepill/usingstlink/assets/usingstlink_build.jpg</g:image_link> <updated>2020-05-24T09:47:27Z</updated> <title>#547 Using STLink with the Arduino IDE</title> <summary>Programming an ARM Cortex-M3 STM32F103C8T6 Blue Pill with an ST Link v2 programmer and the Arduino IDE</summary> <content type="html"><div><p>Programming an ARM Cortex-M3 STM32F103C8T6 Blue Pill with an ST Link v2 programmer and the Arduino IDE</p><img src="https://leap.tardate.com/arm/stm32f103c8t6/bluepill/usingstlink/assets/usingstlink_build.jpg" /></div></content> <category term="STM32"/> </entry> <entry> <id>https://leap.tardate.com/arm/stm32f103c8t6/48pindevboard/</id> <link href="https://leap.tardate.com/arm/stm32f103c8t6/48pindevboard/"/> <g:image_link>https://leap.tardate.com/arm/stm32f103c8t6/48pindevboard/assets/48pindevboard_build.jpg</g:image_link> <updated>2020-05-24T09:47:27Z</updated> <title>#546 STM32F103C8T6 Dev Board</title> <summary>Programming the 48 pin version of the ARM Cortex-M3 STM32F103C8T6 board with the Arduino IDE, with examples of programming using USB-Serial or ST-Link v2 from MacOSX</summary> <content type="html"><div><p>Programming the 48 pin version of the ARM Cortex-M3 STM32F103C8T6 board with the Arduino IDE, with examples of programming using USB-Serial or ST-Link v2 from MacOSX</p><img src="https://leap.tardate.com/arm/stm32f103c8t6/48pindevboard/assets/48pindevboard_build.jpg" /></div></content> <category term="STM32"/> </entry> <entry> <id>https://leap.tardate.com/esp8266/youtubefootswitch/</id> <link href="https://leap.tardate.com/esp8266/youtubefootswitch/"/> <g:image_link>https://leap.tardate.com/esp8266/youtubefootswitch/assets/youtubefootswitch_build.jpg</g:image_link> <updated>2020-04-05T09:11:02Z</updated> <title>#545 Wireless YouTube Foot Switch</title> <summary>An ESP8266-powered foot switch for controlling and looping YouTube videos (ideal for music practice)</summary> <content type="html"><div><p>An ESP8266-powered foot switch for controlling and looping YouTube videos (ideal for music practice)</p><img src="https://leap.tardate.com/esp8266/youtubefootswitch/assets/youtubefootswitch_build.jpg" /></div></content> <category term="ESP8266"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/batterymanagement/shengyang18650batteryshield/</id> <link href="https://leap.tardate.com/electronics101/batterymanagement/shengyang18650batteryshield/"/> <g:image_link>https://leap.tardate.com/electronics101/batterymanagement/shengyang18650batteryshield/assets/shengyang18650batteryshield_build.jpg</g:image_link> <updated>2020-04-12T14:55:34Z</updated> <title>#544 ShengYang 18650 Battery Shield</title> <summary>Checking out the ShengYang 18650 Battery Shield V3 - single cell with USB charge controller and three regulated outputs - 3V, 5V and switchable USB Type A.</summary> <content type="html"><div><p>Checking out the ShengYang 18650 Battery Shield V3 - single cell with USB charge controller and three regulated outputs - 3V, 5V and switchable USB Type A.</p><img src="https://leap.tardate.com/electronics101/batterymanagement/shengyang18650batteryshield/assets/shengyang18650batteryshield_build.jpg" /></div></content> <category term="Power"/> <category term="BMS"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd4046/rampgenerator/</id> <link href="https://leap.tardate.com/electronics101/cd4046/rampgenerator/"/> <g:image_link>https://leap.tardate.com/electronics101/cd4046/rampgenerator/assets/rampgenerator_build.jpg</g:image_link> <updated>2020-04-12T09:25:31Z</updated> <title>#543 PLL Ramp Generator</title> <summary>A simple CD4046 ramp generator circuit from a design by M.S. Nagaraj published in Elektor 7/1994.</summary> <content type="html"><div><p>A simple CD4046 ramp generator circuit from a design by M.S. Nagaraj published in Elektor 7/1994.</p><img src="https://leap.tardate.com/electronics101/cd4046/rampgenerator/assets/rampgenerator_build.jpg" /></div></content> <category term="Oscillators"/> <category term="CMOS/TTL"/> <category term="CD4046"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/inputdevices/footswitch/</id> <link href="https://leap.tardate.com/electronics101/inputdevices/footswitch/"/> <g:image_link>https://leap.tardate.com/electronics101/inputdevices/footswitch/assets/footswitch_build.jpg</g:image_link> <updated>2020-04-11T19:22:00Z</updated> <title>#542 DIY Foot Switch</title> <summary>A DIY 4-channel foot switch with tri-colour LEDs suitable for use with a microcontroller</summary> <content type="html"><div><p>A DIY 4-channel foot switch with tri-colour LEDs suitable for use with a microcontroller</p><img src="https://leap.tardate.com/electronics101/inputdevices/footswitch/assets/footswitch_build.jpg" /></div></content> <category term="Human Input"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/tl431multivibrator/</id> <link href="https://leap.tardate.com/electronics101/oscillators/tl431multivibrator/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/tl431multivibrator/assets/tl431multivibrator_build.jpg</g:image_link> <updated>2020-04-07T16:21:03Z</updated> <title>#541 TL431 Multivibrator</title> <summary>an unusual multivibrator using a programmable reference with clean square wave output</summary> <content type="html"><div><p>an unusual multivibrator using a programmable reference with clean square wave output</p><img src="https://leap.tardate.com/electronics101/oscillators/tl431multivibrator/assets/tl431multivibrator_build.jpg" /></div></content> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/esp8266/esp12/diydevboard/</id> <link href="https://leap.tardate.com/esp8266/esp12/diydevboard/"/> <g:image_link>https://leap.tardate.com/esp8266/esp12/diydevboard/assets/diydevboard_build.jpg</g:image_link> <updated>2020-04-12T15:28:44Z</updated> <title>#540 ESP-12 DIY Dev Board</title> <summary>Building a programming board for the ESP8266 07/12 variants</summary> <content type="html"><div><p>Building a programming board for the ESP8266 07/12 variants</p><img src="https://leap.tardate.com/esp8266/esp12/diydevboard/assets/diydevboard_build.jpg" /></div></content> <category term="ESP8266"/> </entry> <entry> <id>https://leap.tardate.com/kraft/metalearthleadguitar/</id> <link href="https://leap.tardate.com/kraft/metalearthleadguitar/"/> <g:image_link>https://leap.tardate.com/kraft/metalearthleadguitar/assets/metalearthleadguitar_build.jpg</g:image_link> <updated>2016-03-20T13:13:04Z</updated> <title>#539 Metal Earth Lead Guitar</title> <summary>Pimping up the Metal Earth Electric Lead Guitar kit with some sound activated LEDs with electronics squirreled away in an 'amp'</summary> <content type="html"><div><p>Pimping up the Metal Earth Electric Lead Guitar kit with some sound activated LEDs with electronics squirreled away in an 'amp'</p><img src="https://leap.tardate.com/kraft/metalearthleadguitar/assets/metalearthleadguitar_build.jpg" /></div></content> <category term="Craft"/> <category term="LED"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/batterymanagement/singlecellchargeboostboard/</id> <link href="https://leap.tardate.com/electronics101/batterymanagement/singlecellchargeboostboard/"/> <g:image_link>https://leap.tardate.com/electronics101/batterymanagement/singlecellchargeboostboard/assets/singlecellchargeboostboard_build.jpg</g:image_link> <updated>2020-03-29T10:06:02Z</updated> <title>#538 Single-cell Charge/Boost Board</title> <summary>An 18650 single-cell battery module with integrated TP4056 5V/USB charge controller and MT3608 5V output boost converter</summary> <content type="html"><div><p>An 18650 single-cell battery module with integrated TP4056 5V/USB charge controller and MT3608 5V output boost converter</p><img src="https://leap.tardate.com/electronics101/batterymanagement/singlecellchargeboostboard/assets/singlecellchargeboostboard_build.jpg" /></div></content> <category term="Power"/> <category term="BMS"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/schmitttrigger/switchdebouncer/</id> <link href="https://leap.tardate.com/electronics101/schmitttrigger/switchdebouncer/"/> <g:image_link>https://leap.tardate.com/electronics101/schmitttrigger/switchdebouncer/assets/switchdebouncer_build.jpg</g:image_link> <updated>2020-03-28T14:24:26Z</updated> <title>#537 Schmitt Switch Debouncer</title> <summary>Testing a simple Schmitt Trigger debounce circuit using a 74HC14</summary> <content type="html"><div><p>Testing a simple Schmitt Trigger debounce circuit using a 74HC14</p><img src="https://leap.tardate.com/electronics101/schmitttrigger/switchdebouncer/assets/switchdebouncer_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="74HC14"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/schmitttrigger/powerokindicator/</id> <link href="https://leap.tardate.com/electronics101/schmitttrigger/powerokindicator/"/> <g:image_link>https://leap.tardate.com/electronics101/schmitttrigger/powerokindicator/assets/powerokindicator_build.jpg</g:image_link> <updated>2020-03-28T11:39:15Z</updated> <title>#536 Power OK Indicator</title> <summary>Testing a simple Schmitt Trigger power OK indicator using a 74HC14</summary> <content type="html"><div><p>Testing a simple Schmitt Trigger power OK indicator using a 74HC14</p><img src="https://leap.tardate.com/electronics101/schmitttrigger/powerokindicator/assets/powerokindicator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="74HC14"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/detectors/aclinedetector/</id> <link href="https://leap.tardate.com/electronics101/detectors/aclinedetector/"/> <g:image_link>https://leap.tardate.com/electronics101/detectors/aclinedetector/assets/aclinedetector_build.jpg</g:image_link> <updated>2020-03-26T23:24:28Z</updated> <title>#535 AC Line Detector</title> <summary>Playing around with a simple AC line current detector</summary> <content type="html"><div><p>Playing around with a simple AC line current detector</p><img src="https://leap.tardate.com/electronics101/detectors/aclinedetector/assets/aclinedetector_build.jpg" /></div></content> <category term="Power"/> <category term="Sensors"/> </entry> <entry> <id>https://leap.tardate.com/esp8266/esp12/programming/</id> <link href="https://leap.tardate.com/esp8266/esp12/programming/"/> <g:image_link>https://leap.tardate.com/esp8266/esp12/programming/assets/programming_build.jpg</g:image_link> <updated>2020-04-06T16:18:48Z</updated> <title>#534 ESP-12 Programming</title> <summary>The basics of programming an ESP-12 with the ESP8266 core for Arduino</summary> <content type="html"><div><p>The basics of programming an ESP-12 with the ESP8266 core for Arduino</p><img src="https://leap.tardate.com/esp8266/esp12/programming/assets/programming_build.jpg" /></div></content> <category term="ESP8266"/> </entry> <entry> <id>https://leap.tardate.com/pic/tedsclock/</id> <link href="https://leap.tardate.com/pic/tedsclock/"/> <g:image_link>https://leap.tardate.com/pic/tedsclock/assets/tedsclock_build.jpg</g:image_link> <updated>2021-04-05T08:52:23Z</updated> <title>#533 Ted's LED Clock</title> <summary>Building a freeform 20th anniversary clone of @tedyapo's LED clock, driven with a PIC16F84A</summary> <content type="html"><div><p>Building a freeform 20th anniversary clone of @tedyapo's LED clock, driven with a PIC16F84A</p><img src="https://leap.tardate.com/pic/tedsclock/assets/tedsclock_build.jpg" /></div></content> <category term="PIC"/> <category term="LED"/> <category term="Circuit Sculpture"/> <category term="Freeform"/> </entry> <entry> <id>https://leap.tardate.com/pic/pic16f84ablinky/</id> <link href="https://leap.tardate.com/pic/pic16f84ablinky/"/> <g:image_link>https://leap.tardate.com/pic/pic16f84ablinky/assets/pic16f84ablinky_build.jpg</g:image_link> <updated>2020-03-15T14:22:44Z</updated> <title>#532 PIC16F84A Blinky</title> <summary>A quick test of programming a PIC16F84A on a breadboard and 3rd party dev board with MPLabX (assembler)</summary> <content type="html"><div><p>A quick test of programming a PIC16F84A on a breadboard and 3rd party dev board with MPLabX (assembler)</p><img src="https://leap.tardate.com/pic/pic16f84ablinky/assets/pic16f84ablinky_build.jpg" /></div></content> <category term="PIC"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/playground/attiny/ssd1306/basicdemo/</id> <link href="https://leap.tardate.com/playground/attiny/ssd1306/basicdemo/"/> <g:image_link>https://leap.tardate.com/playground/attiny/ssd1306/basicdemo/assets/basicdemo_build.jpg</g:image_link> <updated>2020-02-17T01:58:49Z</updated> <title>#531 ATtiny SSD1306 I²C</title> <summary>Basic demonstration using an ATtiny85 to drive an SSD1306 OLED over I²C</summary> <content type="html"><div><p>Basic demonstration using an ATtiny85 to drive an SSD1306 OLED over I²C</p><img src="https://leap.tardate.com/playground/attiny/ssd1306/basicdemo/assets/basicdemo_build.jpg" /></div></content> <category term="AVR"/> <category term="OLED"/> </entry> <entry> <id>https://leap.tardate.com/playground/oled/ssd1306barebacki2c/</id> <link href="https://leap.tardate.com/playground/oled/ssd1306barebacki2c/"/> <g:image_link>https://leap.tardate.com/playground/oled/ssd1306barebacki2c/assets/ssd1306barebacki2c_build.jpg</g:image_link> <updated>2020-02-16T16:08:47Z</updated> <title>#530 SSD1306 OLED Bareback I²C</title> <summary>Test driving a monochrome 128x32 OLED Display with an Arduino and the raw command set over I²C</summary> <content type="html"><div><p>Test driving a monochrome 128x32 OLED Display with an Arduino and the raw command set over I²C</p><img src="https://leap.tardate.com/playground/oled/ssd1306barebacki2c/assets/ssd1306barebacki2c_build.jpg" /></div></content> <category term="OLED"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/attiny/pinchangeinterrupts/</id> <link href="https://leap.tardate.com/playground/attiny/pinchangeinterrupts/"/> <g:image_link>https://leap.tardate.com/playground/attiny/pinchangeinterrupts/assets/pinchangeinterrupts_build.jpg</g:image_link> <updated>2020-02-17T17:45:56Z</updated> <title>#529 ATtiny Pin Change Interrupts</title> <summary>How to use pin change interrupts with the ATtiny85</summary> <content type="html"><div><p>How to use pin change interrupts with the ATtiny85</p><img src="https://leap.tardate.com/playground/attiny/pinchangeinterrupts/assets/pinchangeinterrupts_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/ixpando/attinycontroller/</id> <link href="https://leap.tardate.com/boldportclub/ixpando/attinycontroller/"/> <g:image_link>https://leap.tardate.com/boldportclub/ixpando/attinycontroller/assets/attinycontroller_build.jpg</g:image_link> <updated>2020-01-29T00:24:45Z</updated> <title>#528 ATtiny IxpandO</title> <summary>Using an ATtiny85 to drive the Boldport IxpandO MCP23017-based I²C IO expansion board</summary> <content type="html"><div><p>Using an ATtiny85 to drive the Boldport IxpandO MCP23017-based I²C IO expansion board</p><img src="https://leap.tardate.com/boldportclub/ixpando/attinycontroller/assets/attinycontroller_build.jpg" /></div></content> <category term="Boldport"/> <category term="Port Expander"/> <category term="AVR"/> </entry> <entry> <id>https://leap.tardate.com/playground/oled/ssd1306_u8g2/</id> <link href="https://leap.tardate.com/playground/oled/ssd1306_u8g2/"/> <g:image_link>https://leap.tardate.com/playground/oled/ssd1306_u8g2/assets/ssd1306_u8g2_build.jpg</g:image_link> <updated>2020-02-16T16:08:47Z</updated> <title>#527 SSD1306 With u8g v2</title> <summary>Testing an SSD1306 128x32 OLED with the new v2 u8g library over I²C</summary> <content type="html"><div><p>Testing an SSD1306 128x32 OLED with the new v2 u8g library over I²C</p><img src="https://leap.tardate.com/playground/oled/ssd1306_u8g2/assets/ssd1306_u8g2_build.jpg" /></div></content> <category term="OLED"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/equipment/metaldetectorkit/</id> <link href="https://leap.tardate.com/equipment/metaldetectorkit/"/> <g:image_link>https://leap.tardate.com/equipment/metaldetectorkit/assets/metaldetectorkit_build.jpg</g:image_link> <updated>2020-01-20T00:42:00Z</updated> <title>#526 Metal Detector Kit</title> <summary>An inductive metal detector kit powered by an 18650 with TP4333-based BMS charging circuit</summary> <content type="html"><div><p>An inductive metal detector kit powered by an 18650 with TP4333-based BMS charging circuit</p><img src="https://leap.tardate.com/equipment/metaldetectorkit/assets/metaldetectorkit_build.jpg" /></div></content> <category term="BMS"/> <category term="RF"/> </entry> <entry> <id>https://leap.tardate.com/audio/simplesoundeffects2/</id> <link href="https://leap.tardate.com/audio/simplesoundeffects2/"/> <g:image_link>https://leap.tardate.com/audio/simplesoundeffects2/assets/simplesoundeffects2_build.jpg</g:image_link> <updated>2020-01-02T23:43:01Z</updated> <title>#525 Simple Sound Effects 2</title> <summary>Building the ATtiny version of the Elektor Simple Sound Effects project, with a port to Arduino/C++.</summary> <content type="html"><div><p>Building the ATtiny version of the Elektor Simple Sound Effects project, with a port to Arduino/C++.</p><img src="https://leap.tardate.com/audio/simplesoundeffects2/assets/simplesoundeffects2_build.jpg" /></div></content> <category term="Audio"/> <category term="AVR"/> </entry> <entry> <id>https://leap.tardate.com/playground/thermalprinter/lucky4doracle/</id> <link href="https://leap.tardate.com/playground/thermalprinter/lucky4doracle/"/> <g:image_link>https://leap.tardate.com/playground/thermalprinter/lucky4doracle/assets/lucky4doracle_build.jpg</g:image_link> <updated>2019-12-30T06:13:53Z</updated> <title>#524 Lucky 4D Printer</title> <summary>A Lucky 4D number generator, built with a JP-QR701 Thermal Printer, including a detour into to print Chinese (GB2312-80)</summary> <content type="html"><div><p>A Lucky 4D number generator, built with a JP-QR701 Thermal Printer, including a detour into to print Chinese (GB2312-80)</p><img src="https://leap.tardate.com/playground/thermalprinter/lucky4doracle/assets/lucky4doracle_build.jpg" /></div></content> <category term="Arduino"/> <category term="Thermal Printer"/> </entry> <entry> <id>https://leap.tardate.com/playground/thermalprinter/qr701basics/</id> <link href="https://leap.tardate.com/playground/thermalprinter/qr701basics/"/> <g:image_link>https://leap.tardate.com/playground/thermalprinter/qr701basics/assets/qr701basics_build.jpg</g:image_link> <updated>2019-12-28T09:21:05Z</updated> <title>#523 JP-QR701 Thermal Printer Basics</title> <summary>Learning how to use the JP-QR701 thermal printer module with an Arduino, including QR codes generated with Python</summary> <content type="html"><div><p>Learning how to use the JP-QR701 thermal printer module with an Arduino, including QR codes generated with Python</p><img src="https://leap.tardate.com/playground/thermalprinter/qr701basics/assets/qr701basics_build.jpg" /></div></content> <category term="Arduino"/> <category term="Thermal Printer"/> </entry> <entry> <id>https://leap.tardate.com/radio/lpd433/rfdoorbell/</id> <link href="https://leap.tardate.com/radio/lpd433/rfdoorbell/"/> <g:image_link>https://leap.tardate.com/radio/lpd433/rfdoorbell/assets/rfdoorbell_build.jpg</g:image_link> <updated>2019-09-23T14:03:02Z</updated> <title>#522 Remote Doorbell</title> <summary>A simple doorbell using a 433MHz transmitter/receiver pair for remote signalling, and an HS-088 sound chip for a doorbell effect</summary> <content type="html"><div><p>A simple doorbell using a 433MHz transmitter/receiver pair for remote signalling, and an HS-088 sound chip for a doorbell effect</p><img src="https://leap.tardate.com/radio/lpd433/rfdoorbell/assets/rfdoorbell_build.jpg" /></div></content> <category term="Radio"/> <category term="OpAmp"/> <category term="LPD433"/> <category term="Music Chips"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioeffectschips/ck9561/</id> <link href="https://leap.tardate.com/audio/audioeffectschips/ck9561/"/> <g:image_link>https://leap.tardate.com/audio/audioeffectschips/ck9561/assets/ck9561_build.jpg</g:image_link> <updated>2019-12-20T01:53:09Z</updated> <title>#521 CK9561 Audio Effects Chip</title> <summary>Figuring out how to use the CK9561 music chip with 4 sound effects - alarm/siren/weapon sounds that sound strangely familiar if you have ever walked through a toy department at Christmas!</summary> <content type="html"><div><p>Figuring out how to use the CK9561 music chip with 4 sound effects - alarm/siren/weapon sounds that sound strangely familiar if you have ever walked through a toy department at Christmas!</p><img src="https://leap.tardate.com/audio/audioeffectschips/ck9561/assets/ck9561_build.jpg" /></div></content> <category term="Audio"/> <category term="Music Chips"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/continuitytester/</id> <link href="https://leap.tardate.com/electronics101/555timer/continuitytester/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/continuitytester/assets/continuitytester_build.jpg</g:image_link> <updated>2019-12-16T01:30:43Z</updated> <title>#520 Continuity Tester</title> <summary>A low-resistance continuity tester in a solder tube. Runs on 3V with a 555 timer buzzer.</summary> <content type="html"><div><p>A low-resistance continuity tester in a solder tube. Runs on 3V with a 555 timer buzzer.</p><img src="https://leap.tardate.com/electronics101/555timer/continuitytester/assets/continuitytester_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Tools"/> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/fuses/pptcperformance/</id> <link href="https://leap.tardate.com/electronics101/fuses/pptcperformance/"/> <g:image_link>https://leap.tardate.com/electronics101/fuses/pptcperformance/assets/pptcperformance_build.jpg</g:image_link> <updated>2019-12-16T16:41:40Z</updated> <title>#519 PPTC Performance</title> <summary>Testing the performance of a few PolySwitch polymeric positive temperature coefficient (PPTC) resettable fuses</summary> <content type="html"><div><p>Testing the performance of a few PolySwitch polymeric positive temperature coefficient (PPTC) resettable fuses</p><img src="https://leap.tardate.com/electronics101/fuses/pptcperformance/assets/pptcperformance_build.jpg" /></div></content> <category term="Fuse"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/equipment/lipotestermodule/</id> <link href="https://leap.tardate.com/equipment/lipotestermodule/"/> <g:image_link>https://leap.tardate.com/equipment/lipotestermodule/assets/lipotestermodule_build.jpg</g:image_link> <updated>2019-12-14T12:53:43Z</updated> <title>#518 Lipo Tester Module</title> <summary>Just a quick look at a 1S to 8S battery tester and alarm module.</summary> <content type="html"><div><p>Just a quick look at a 1S to 8S battery tester and alarm module.</p><img src="https://leap.tardate.com/equipment/lipotestermodule/assets/lipotestermodule_build.jpg" /></div></content> <category term="Power"/> <category term="BMS"/> <category term="Tools"/> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/precisionvariablefrequencyfixedduty/</id> <link href="https://leap.tardate.com/electronics101/555timer/precisionvariablefrequencyfixedduty/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/precisionvariablefrequencyfixedduty/assets/precisionvariablefrequencyfixedduty_build.jpg</g:image_link> <updated>2019-12-14T09:24:44Z</updated> <title>#517 555 Timer Fixed-duty VFO</title> <summary>Using an unconventional configuration of a 555 timer variable frequency oscillator with fixed duty cycle (and precise duty cycle fine adjustment)</summary> <content type="html"><div><p>Using an unconventional configuration of a 555 timer variable frequency oscillator with fixed duty cycle (and precise duty cycle fine adjustment)</p><img src="https://leap.tardate.com/electronics101/555timer/precisionvariablefrequencyfixedduty/assets/precisionvariablefrequencyfixedduty_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/radio/fm/zx2031kit/</id> <link href="https://leap.tardate.com/radio/fm/zx2031kit/"/> <g:image_link>https://leap.tardate.com/radio/fm/zx2031kit/assets/zx2031kit_build.jpg</g:image_link> <updated>2019-12-08T03:41:04Z</updated> <title>#516 ZX2031 FM Radio Kit</title> <summary>Building an FM radio kit based on the Silan SC1088 FM receiver chip</summary> <content type="html"><div><p>Building an FM radio kit based on the Silan SC1088 FM receiver chip</p><img src="https://leap.tardate.com/radio/fm/zx2031kit/assets/zx2031kit_build.jpg" /></div></content> <category term="Radio"/> <category term="FM"/> </entry> <entry> <id>https://leap.tardate.com/radio/fm/frequencyconverter/</id> <link href="https://leap.tardate.com/radio/fm/frequencyconverter/"/> <g:image_link>https://leap.tardate.com/radio/fm/frequencyconverter/assets/frequencyconverter_build.jpg</g:image_link> <updated>2019-12-07T16:19:24Z</updated> <title>#515 FM Converter</title> <summary>Playing with a simple FM frequency conversion circuit, and demonstrating how it can be used for external tuning</summary> <content type="html"><div><p>Playing with a simple FM frequency conversion circuit, and demonstrating how it can be used for external tuning</p><img src="https://leap.tardate.com/radio/fm/frequencyconverter/assets/frequencyconverter_build.jpg" /></div></content> <category term="Radio"/> <category term="FM"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/subtractionloopcounterkit/</id> <link href="https://leap.tardate.com/electronics101/subtractionloopcounterkit/"/> <g:image_link>https://leap.tardate.com/electronics101/subtractionloopcounterkit/assets/subtractionloopcounterkit_build.jpg</g:image_link> <updated>2019-12-05T04:03:54Z</updated> <title>#514 Subtraction Loop Counter Kit</title> <summary>Investigating a single-digit counter with configurable range and frequency built with 74HC192, CD4011 and CD4511 logic</summary> <content type="html"><div><p>Investigating a single-digit counter with configurable range and frequency built with 74HC192, CD4011 and CD4511 logic</p><img src="https://leap.tardate.com/electronics101/subtractionloopcounterkit/assets/subtractionloopcounterkit_build.jpg" /></div></content> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/equipment/dummyload/simpleresistiveusbload/</id> <link href="https://leap.tardate.com/equipment/dummyload/simpleresistiveusbload/"/> <g:image_link>https://leap.tardate.com/equipment/dummyload/simpleresistiveusbload/assets/simpleresistiveusbload_build.jpg</g:image_link> <updated>2019-12-06T12:58:19Z</updated> <title>#513 Simple USB Dummy Load</title> <summary>Examining and testing a simple USB resistive dummy load</summary> <content type="html"><div><p>Examining and testing a simple USB resistive dummy load</p><img src="https://leap.tardate.com/equipment/dummyload/simpleresistiveusbload/assets/simpleresistiveusbload_build.jpg" /></div></content> <category term="USB"/> <category term="Dummy Load"/> </entry> <entry> <id>https://leap.tardate.com/audio/greatersimplesoundeffects/</id> <link href="https://leap.tardate.com/audio/greatersimplesoundeffects/"/> <g:image_link>https://leap.tardate.com/audio/greatersimplesoundeffects/assets/greatersimplesoundeffects_build.jpg</g:image_link> <updated>2021-04-05T08:52:23Z</updated> <title>#512 Greater Simple Sound Effects</title> <summary>Reviving a design from Elektor in 1980, with light and touch-sensor variations on the basic CD4040/CD4049 oscillator. The circuit must have been used in BEAM robots back in the day, so my final build is a freeform phototrope squawker.</summary> <content type="html"><div><p>Reviving a design from Elektor in 1980, with light and touch-sensor variations on the basic CD4040/CD4049 oscillator. The circuit must have been used in BEAM robots back in the day, so my final build is a freeform phototrope squawker.</p><img src="https://leap.tardate.com/audio/greatersimplesoundeffects/assets/greatersimplesoundeffects_build.jpg" /></div></content> <category term="BEAM"/> <category term="CMOS/TTL"/> <category term="CD4040"/> <category term="CD4049"/> <category term="LM386"/> <category term="Sensors"/> <category term="Circuit Sculpture"/> <category term="Freeform"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/bridgedoublersplitsupply/</id> <link href="https://leap.tardate.com/electronics101/power/bridgedoublersplitsupply/"/> <g:image_link>https://leap.tardate.com/electronics101/power/bridgedoublersplitsupply/assets/bridgedoublersplitsupply_build.jpg</g:image_link> <updated>2019-11-17T13:19:59Z</updated> <title>#511 Bridge Doubler Split Supply</title> <summary>an AC-powered bridge doubler supply with DC output governed by 7815/7915 ±15V DC linear regulation</summary> <content type="html"><div><p>an AC-powered bridge doubler supply with DC output governed by 7815/7915 ±15V DC linear regulation</p><img src="https://leap.tardate.com/electronics101/power/bridgedoublersplitsupply/assets/bridgedoublersplitsupply_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/serialinterface/usbtors232/</id> <link href="https://leap.tardate.com/electronics101/serialinterface/usbtors232/"/> <g:image_link>https://leap.tardate.com/electronics101/serialinterface/usbtors232/assets/usbtors232_build.jpg</g:image_link> <updated>2019-11-14T08:07:27Z</updated> <title>#510 USB to RS-232 Adapter</title> <summary>building a USB to 3-wire RS-232 adapter with the CH340G and MAX3232 chipsets</summary> <content type="html"><div><p>building a USB to 3-wire RS-232 adapter with the CH340G and MAX3232 chipsets</p><img src="https://leap.tardate.com/electronics101/serialinterface/usbtors232/assets/usbtors232_build.jpg" /></div></content> <category term="RS232"/> <category term="Serial"/> <category term="USB"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/serialinterface/max3232/rs232ttlmodule/</id> <link href="https://leap.tardate.com/electronics101/serialinterface/max3232/rs232ttlmodule/"/> <g:image_link>https://leap.tardate.com/electronics101/serialinterface/max3232/rs232ttlmodule/assets/rs232ttlmodule_build.jpg</g:image_link> <updated>2019-11-12T17:00:01Z</updated> <title>#509 MAX3232 RS232 to TTL Module</title> <summary>Using a MAX3232 Module with CH340 adapter for USB to RS-232 serial communication, with examples using screen on MacOSX</summary> <content type="html"><div><p>Using a MAX3232 Module with CH340 adapter for USB to RS-232 serial communication, with examples using screen on MacOSX</p><img src="https://leap.tardate.com/electronics101/serialinterface/max3232/rs232ttlmodule/assets/rs232ttlmodule_build.jpg" /></div></content> <category term="RS232"/> <category term="Serial"/> <category term="USB"/> </entry> <entry> <id>https://leap.tardate.com/esp32/usingmdns/</id> <link href="https://leap.tardate.com/esp32/usingmdns/"/> <g:image_link>https://leap.tardate.com/esp32/usingmdns/assets/usingmdns_build.jpg</g:image_link> <updated>2019-11-06T16:22:04Z</updated> <title>#508 Using mDNS</title> <summary>delving into multicast DNS and how it can be used to find and connect to ESP32 devices on the network</summary> <content type="html"><div><p>delving into multicast DNS and how it can be used to find and connect to ESP32 devices on the network</p><img src="https://leap.tardate.com/esp32/usingmdns/assets/usingmdns_build.jpg" /></div></content> <category term="ESP32"/> <category term="mDNS"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/switches/singlestagedelay/</id> <link href="https://leap.tardate.com/electronics101/switches/singlestagedelay/"/> <g:image_link>https://leap.tardate.com/electronics101/switches/singlestagedelay/assets/singlestagedelay_build.jpg</g:image_link> <updated>2019-11-05T03:54:01Z</updated> <title>#507 Single-stage Delay Switch</title> <summary>comparing BJT and MOSFETs for creating a simple turn-off delay with discrete components</summary> <content type="html"><div><p>comparing BJT and MOSFETs for creating a simple turn-off delay with discrete components</p><img src="https://leap.tardate.com/electronics101/switches/singlestagedelay/assets/singlestagedelay_build.jpg" /></div></content> <category term="Switches"/> <category term="RC"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/pcbmode/</id> <link href="https://leap.tardate.com/boldportclub/pcbmode/"/> <g:image_link>https://leap.tardate.com/boldportclub/pcbmode/assets/pcbmode_build.jpg</g:image_link> <updated>2019-11-03T23:38:33Z</updated> <title>#506 Learning PCBmodE</title> <summary>learning how to use Boldport PCBmodE design software with an example of making a simple 555 timer LED blinky PCB</summary> <content type="html"><div><p>learning how to use Boldport PCBmodE design software with an example of making a simple 555 timer LED blinky PCB</p><img src="https://leap.tardate.com/boldportclub/pcbmode/assets/pcbmode_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="EDA"/> </entry> <entry> <id>https://leap.tardate.com/audio/rakitbaby8sequencer/</id> <link href="https://leap.tardate.com/audio/rakitbaby8sequencer/"/> <g:image_link>https://leap.tardate.com/audio/rakitbaby8sequencer/assets/rakitbaby8sequencer_build.jpg</g:image_link> <updated>2019-10-28T10:44:37Z</updated> <title>#505 Rakit Baby8 Sequencer</title> <summary>Building the Rakit Baby8, an 8 step sequencer with CV and Gate outputs and a clock input.</summary> <content type="html"><div><p>Building the Rakit Baby8, an 8 step sequencer with CV and Gate outputs and a clock input.</p><img src="https://leap.tardate.com/audio/rakitbaby8sequencer/assets/rakitbaby8sequencer_build.jpg" /></div></content> <category term="Audio"/> <category term="Music"/> <category term="Sequencer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ina226/highsidemonitorbasics/</id> <link href="https://leap.tardate.com/electronics101/ina226/highsidemonitorbasics/"/> <g:image_link>https://leap.tardate.com/electronics101/ina226/highsidemonitorbasics/assets/highsidemonitorbasics_build.jpg</g:image_link> <updated>2019-10-26T18:29:58Z</updated> <title>#504 INA226 High-side Monitor Basics</title> <summary>How to design for the INA226 current and power monitor and test with an Arduino and various libraries including raw wire I²C</summary> <content type="html"><div><p>How to design for the INA226 current and power monitor and test with an Arduino and various libraries including raw wire I²C</p><img src="https://leap.tardate.com/electronics101/ina226/highsidemonitorbasics/assets/highsidemonitorbasics_build.jpg" /></div></content> <category term="INA226"/> <category term="Sensors"/> </entry> <entry> <id>https://leap.tardate.com/equipment/imaxrcb3lipocharger/</id> <link href="https://leap.tardate.com/equipment/imaxrcb3lipocharger/"/> <g:image_link>https://leap.tardate.com/equipment/imaxrcb3lipocharger/assets/imaxrcb3lipocharger_build.jpg</g:image_link> <updated>2019-10-20T15:21:27Z</updated> <title>#503 imaxRC B3 Lipo Charger</title> <summary>quick teardown and review of the imax B3 Pro charger for 2s and 3s Lithium-polymer battery packs</summary> <content type="html"><div><p>quick teardown and review of the imax B3 Pro charger for 2s and 3s Lithium-polymer battery packs</p><img src="https://leap.tardate.com/equipment/imaxrcb3lipocharger/assets/imaxrcb3lipocharger_build.jpg" /></div></content> <category term="Power"/> <category term="BMS"/> </entry> <entry> <id>https://leap.tardate.com/equipment/lii202smartcharger/</id> <link href="https://leap.tardate.com/equipment/lii202smartcharger/"/> <g:image_link>https://leap.tardate.com/equipment/lii202smartcharger/assets/lii202smartcharger_build.jpg</g:image_link> <updated>2019-10-20T03:26:48Z</updated> <title>#502 LiitoKala Lii-202 Smart Charger</title> <summary>quick teardown and review of the Lii-202 18650 charger and power bank</summary> <content type="html"><div><p>quick teardown and review of the Lii-202 18650 charger and power bank</p><img src="https://leap.tardate.com/equipment/lii202smartcharger/assets/lii202smartcharger_build.jpg" /></div></content> <category term="Power"/> <category term="BMS"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/batterymanagement/singlecelllithiumcharger/</id> <link href="https://leap.tardate.com/electronics101/batterymanagement/singlecelllithiumcharger/"/> <g:image_link>https://leap.tardate.com/electronics101/batterymanagement/singlecelllithiumcharger/assets/singlecelllithiumcharger_build.jpg</g:image_link> <updated>2019-10-20T03:27:20Z</updated> <title>#501 Single-cell Lithium Charger</title> <summary>How to charge a single 18650 lithium-ion cell with a TP4056-based charging kit, with comparison to ETA9635/ETA9638-based modules</summary> <content type="html"><div><p>How to charge a single 18650 lithium-ion cell with a TP4056-based charging kit, with comparison to ETA9635/ETA9638-based modules</p><img src="https://leap.tardate.com/electronics101/batterymanagement/singlecelllithiumcharger/assets/singlecelllithiumcharger_build.jpg" /></div></content> <category term="Power"/> <category term="BMS"/> </entry> <entry> <id>https://leap.tardate.com/playground/rfid/concentration/</id> <link href="https://leap.tardate.com/playground/rfid/concentration/"/> <g:image_link>https://leap.tardate.com/playground/rfid/concentration/assets/concentration_build.jpg</g:image_link> <updated>2019-06-02T11:03:52Z</updated> <title>#500 RFID Concentration Game</title> <summary>Play a game of Concentration/Pairs with a stack of MIFARE Classic cards</summary> <content type="html"><div><p>Play a game of Concentration/Pairs with a stack of MIFARE Classic cards</p><img src="https://leap.tardate.com/playground/rfid/concentration/assets/concentration_build.jpg" /></div></content> <category term="RFID"/> <category term="Arduino"/> <category term="Boldport"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioeffectschips/hs088/amplified/</id> <link href="https://leap.tardate.com/audio/audioeffectschips/hs088/amplified/"/> <g:image_link>https://leap.tardate.com/audio/audioeffectschips/hs088/amplified/assets/amplified_build.jpg</g:image_link> <updated>2019-09-29T04:43:14Z</updated> <title>#499 HS088 Low-voltage Amplifier</title> <summary>adding a low-voltage BJT class A amplifier for the HS088 Audio Effects Chip</summary> <content type="html"><div><p>adding a low-voltage BJT class A amplifier for the HS088 Audio Effects Chip</p><img src="https://leap.tardate.com/audio/audioeffectschips/hs088/amplified/assets/amplified_build.jpg" /></div></content> <category term="Audio"/> <category term="Music Chips"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/teslacoil/musicalkit/</id> <link href="https://leap.tardate.com/electronics101/teslacoil/musicalkit/"/> <g:image_link>https://leap.tardate.com/electronics101/teslacoil/musicalkit/assets/musicalkit_build.jpg</g:image_link> <updated>2019-09-21T15:29:10Z</updated> <title>#498 Tesla Coil Plasma Speaker Kit</title> <summary>playing with a Tesla coil (slayer exciter) circuit that also acts as an audio speaker with pulsing LED effects</summary> <content type="html"><div><p>playing with a Tesla coil (slayer exciter) circuit that also acts as an audio speaker with pulsing LED effects</p><img src="https://leap.tardate.com/electronics101/teslacoil/musicalkit/assets/musicalkit_build.jpg" /></div></content> <category term="Audio"/> <category term="Power"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/esp32/publishinginternals/</id> <link href="https://leap.tardate.com/esp32/publishinginternals/"/> <g:image_link>https://leap.tardate.com/esp32/publishinginternals/assets/publishinginternals_build.jpg</g:image_link> <updated>2019-09-15T14:46:09Z</updated> <title>#497 Publishing Internals</title> <summary>Publishing live ESP32 system internals to the web - an exploration of ESP32 features and web serving options, including JSON serialization</summary> <content type="html"><div><p>Publishing live ESP32 system internals to the web - an exploration of ESP32 features and web serving options, including JSON serialization</p><img src="https://leap.tardate.com/esp32/publishinginternals/assets/publishinginternals_build.jpg" /></div></content> <category term="ESP32"/> <category term="JSON"/> <category term="WebServer"/> <category term="Sensors"/> </entry> <entry> <id>https://leap.tardate.com/esp32/gettingstarted/</id> <link href="https://leap.tardate.com/esp32/gettingstarted/"/> <g:image_link>https://leap.tardate.com/esp32/gettingstarted/assets/gettingstarted_build.jpg</g:image_link> <updated>2019-09-15T15:37:20Z</updated> <title>#496 ESP32 Getting Started</title> <summary>Getting started with the ESP32: connecting and programming from MacOSX with the Arduino IDE using a WiFi scanner script as an example</summary> <content type="html"><div><p>Getting started with the ESP32: connecting and programming from MacOSX with the Arduino IDE using a WiFi scanner script as an example</p><img src="https://leap.tardate.com/esp32/gettingstarted/assets/gettingstarted_build.jpg" /></div></content> <category term="ESP32"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/bjt/negativefeedbackamplifier/</id> <link href="https://leap.tardate.com/electronics101/bjt/negativefeedbackamplifier/"/> <g:image_link>https://leap.tardate.com/electronics101/bjt/negativefeedbackamplifier/assets/negativefeedbackamplifier_build.jpg</g:image_link> <updated>2018-05-14T06:48:56Z</updated> <title>#495 Negative Feedback Amplifier</title> <summary>examining the design and performance of an ac-coupled negative feedback amplifier constructed with BJTs</summary> <content type="html"><div><p>examining the design and performance of an ac-coupled negative feedback amplifier constructed with BJTs</p><img src="https://leap.tardate.com/electronics101/bjt/negativefeedbackamplifier/assets/negativefeedbackamplifier_build.jpg" /></div></content> <category term="BJT"/> </entry> <entry> <id>https://leap.tardate.com/fpga/fomu/buildnotifier/</id> <link href="https://leap.tardate.com/fpga/fomu/buildnotifier/"/> <g:image_link>https://leap.tardate.com/fpga/fomu/buildnotifier/assets/buildnotifier_build.jpg</g:image_link> <updated>2019-09-06T19:11:07Z</updated> <title>#494 Fomu Build Notifier</title> <summary>using the Fomu's RGB-in-your-USB as a test results notifier in RISC-V C (demonstrated with Ruby, RSpec and Guard)</summary> <content type="html"><div><p>using the Fomu's RGB-in-your-USB as a test results notifier in RISC-V C (demonstrated with Ruby, RSpec and Guard)</p><img src="https://leap.tardate.com/fpga/fomu/buildnotifier/assets/buildnotifier_build.jpg" /></div></content> <category term="FPGA"/> <category term="Ruby"/> </entry> <entry> <id>https://leap.tardate.com/fpga/fomu/gettingstarted/</id> <link href="https://leap.tardate.com/fpga/fomu/gettingstarted/"/> <g:image_link>https://leap.tardate.com/fpga/fomu/gettingstarted/assets/gettingstarted_build.jpg</g:image_link> <updated>2019-09-02T00:25:26Z</updated> <title>#493 Getting Started with Fomu</title> <summary>first look at the Fomu FPGA and some tests running MicroPython on the RISC-V CPU core, and peeking/poking memory over the wishbone bus.</summary> <content type="html"><div><p>first look at the Fomu FPGA and some tests running MicroPython on the RISC-V CPU core, and peeking/poking memory over the wishbone bus.</p><img src="https://leap.tardate.com/fpga/fomu/gettingstarted/assets/gettingstarted_build.jpg" /></div></content> <category term="FPGA"/> </entry> <entry> <id>https://leap.tardate.com/kraft/kickingback/</id> <link href="https://leap.tardate.com/kraft/kickingback/"/> <g:image_link>https://leap.tardate.com/kraft/kickingback/assets/kickingback_build.jpg</g:image_link> <updated>2019-08-21T01:42:29Z</updated> <title>#492 Kicking Back</title> <summary>a useless machine/desktop toy that employs some overly complex mechanics to simply kick a ball (in a minor homage to @mPinoe)</summary> <content type="html"><div><p>a useless machine/desktop toy that employs some overly complex mechanics to simply kick a ball (in a minor homage to @mPinoe)</p><img src="https://leap.tardate.com/kraft/kickingback/assets/kickingback_build.jpg" /></div></content> <category term="Sensors"/> <category term="Solenoid"/> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/solenoids/magnetswitchedsolenoid/</id> <link href="https://leap.tardate.com/kinetics/solenoids/magnetswitchedsolenoid/"/> <g:image_link>https://leap.tardate.com/kinetics/solenoids/magnetswitchedsolenoid/assets/magnetswitchedsolenoid_build.jpg</g:image_link> <updated>2019-08-18T05:07:26Z</updated> <title>#491 Magnet-switched Solenoid</title> <summary>using a Hall effect sensor to trigger a solenoid with a fixed pulse</summary> <content type="html"><div><p>using a Hall effect sensor to trigger a solenoid with a fixed pulse</p><img src="https://leap.tardate.com/kinetics/solenoids/magnetswitchedsolenoid/assets/magnetswitchedsolenoid_build.jpg" /></div></content> <category term="Solenoid"/> <category term="Sensors"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/edgedetection/555fallingedgedetector/</id> <link href="https://leap.tardate.com/electronics101/edgedetection/555fallingedgedetector/"/> <g:image_link>https://leap.tardate.com/electronics101/edgedetection/555fallingedgedetector/assets/555fallingedgedetector_build.jpg</g:image_link> <updated>2019-08-18T10:05:10Z</updated> <title>#490 555 Falling Edge Detector</title> <summary>using the 555 timer, BJT inverter and AC-coupling to produce a fixed-width falling edge trigger pulse</summary> <content type="html"><div><p>using the 555 timer, BJT inverter and AC-coupling to produce a fixed-width falling edge trigger pulse</p><img src="https://leap.tardate.com/electronics101/edgedetection/555fallingedgedetector/assets/555fallingedgedetector_build.jpg" /></div></content> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/edgedetection/555risingedgedetector/</id> <link href="https://leap.tardate.com/electronics101/edgedetection/555risingedgedetector/"/> <g:image_link>https://leap.tardate.com/electronics101/edgedetection/555risingedgedetector/assets/555risingedgedetector_build.jpg</g:image_link> <updated>2019-08-18T09:26:36Z</updated> <title>#489 555 Rising Edge Detector</title> <summary>using the 555 timer and AC-coupling to produce a fixed-width rising edge trigger pulse</summary> <content type="html"><div><p>using the 555 timer and AC-coupling to produce a fixed-width rising edge trigger pulse</p><img src="https://leap.tardate.com/electronics101/edgedetection/555risingedgedetector/assets/555risingedgedetector_build.jpg" /></div></content> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/edgedetection/xorrcedgedetector/</id> <link href="https://leap.tardate.com/electronics101/edgedetection/xorrcedgedetector/"/> <g:image_link>https://leap.tardate.com/electronics101/edgedetection/xorrcedgedetector/assets/xorrcedgedetector_build.jpg</g:image_link> <updated>2019-08-18T07:16:35Z</updated> <title>#488 XOR-RC Edge Detector</title> <summary>Dual edge detection with a 74LS86 XOR and RC circuit</summary> <content type="html"><div><p>Dual edge detection with a 74LS86 XOR and RC circuit</p><img src="https://leap.tardate.com/electronics101/edgedetection/xorrcedgedetector/assets/xorrcedgedetector_build.jpg" /></div></content> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/crystallocked1khzoscillator/</id> <link href="https://leap.tardate.com/electronics101/oscillators/crystallocked1khzoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/crystallocked1khzoscillator/assets/crystallocked1khzoscillator_build.jpg</g:image_link> <updated>2019-03-03T17:16:27Z</updated> <title>#487 Crystal-locked 1kHz Oscillator</title> <summary>a 4.096MHz crystal oscillator divided by a CD4060, governing a wien-bridge oscillator to produce buffered sine and square wave outputs locked at 1kHz</summary> <content type="html"><div><p>a 4.096MHz crystal oscillator divided by a CD4060, governing a wien-bridge oscillator to produce buffered sine and square wave outputs locked at 1kHz</p><img src="https://leap.tardate.com/electronics101/oscillators/crystallocked1khzoscillator/assets/crystallocked1khzoscillator_build.jpg" /></div></content> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/playground/usingtemplates/</id> <link href="https://leap.tardate.com/playground/usingtemplates/"/> <g:image_link>https://leap.tardate.com/playground/usingtemplates/assets/usingtemplates_build.jpg</g:image_link> <updated>2019-07-21T17:15:49Z</updated> <title>#486 Using C++ Templates</title> <summary>Learning how to use C++ template functions in embedded projects with an Arduino</summary> <content type="html"><div><p>Learning how to use C++ template functions in embedded projects with an Arduino</p><img src="https://leap.tardate.com/playground/usingtemplates/assets/usingtemplates_build.jpg" /></div></content> <category term="Arduino"/> <category term="C++"/> </entry> <entry> <id>https://leap.tardate.com/playground/rfid/cardcounter/</id> <link href="https://leap.tardate.com/playground/rfid/cardcounter/"/> <g:image_link>https://leap.tardate.com/playground/rfid/cardcounter/assets/cardcounter_build.jpg</g:image_link> <updated>2019-06-04T23:46:11Z</updated> <title>#485 RFID Card Counter</title> <summary>Simple demonstratration of reading an writing value blocks with an RC522 RFID reader and MIFARE Classic cards</summary> <content type="html"><div><p>Simple demonstratration of reading an writing value blocks with an RC522 RFID reader and MIFARE Classic cards</p><img src="https://leap.tardate.com/playground/rfid/cardcounter/assets/cardcounter_build.jpg" /></div></content> <category term="RFID"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/crystallocked455khzmodulated/</id> <link href="https://leap.tardate.com/electronics101/oscillators/crystallocked455khzmodulated/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/crystallocked455khzmodulated/assets/crystallocked455khzmodulated_build.jpg</g:image_link> <updated>2019-05-31T13:59:42Z</updated> <title>#484 Crystal-Locked 455 kHz AM Oscillator</title> <summary>crystal-locked 455 kHz carrier oscillator with fixed-frequency audio tone amplitude modulation (AM) for IF alignment</summary> <content type="html"><div><p>crystal-locked 455 kHz carrier oscillator with fixed-frequency audio tone amplitude modulation (AM) for IF alignment</p><img src="https://leap.tardate.com/electronics101/oscillators/crystallocked455khzmodulated/assets/crystallocked455khzmodulated_build.jpg" /></div></content> <category term="Radio"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/kraft/wyled/</id> <link href="https://leap.tardate.com/kraft/wyled/"/> <g:image_link>https://leap.tardate.com/kraft/wyled/assets/wyled_build.jpg</g:image_link> <updated>2021-04-05T08:52:23Z</updated> <title>#483 WyLed</title> <summary>.. when you allow an exploration of a chip (TM1638) to get a little out of hand! The WyLed free-form sculpture reacts to sound and blinks a 4-digit LED display. An ATTiny85 provides a little brain, and the TM1638 handles all input and output.</summary> <content type="html"><div><p>.. when you allow an exploration of a chip (TM1638) to get a little out of hand! The WyLed free-form sculpture reacts to sound and blinks a 4-digit LED display. An ATTiny85 provides a little brain, and the TM1638 handles all input and output.</p><img src="https://leap.tardate.com/kraft/wyled/assets/wyled_build.jpg" /></div></content> <category term="Arduino"/> <category term="ATmel"/> <category term="LED"/> <category term="TM1638"/> <category term="Circuit Sculpture"/> <category term="Freeform"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/electret/soundleveltrigger/</id> <link href="https://leap.tardate.com/electronics101/electret/soundleveltrigger/"/> <g:image_link>https://leap.tardate.com/electronics101/electret/soundleveltrigger/assets/soundleveltrigger_build.jpg</g:image_link> <updated>2019-05-20T09:40:34Z</updated> <title>#482 Electret Sound-level Trigger</title> <summary>a simple circuit using a TL072 op-amp and 74LS14 inverter for getting a clear digital trigger signal based on the sound level detected by an electret microphone</summary> <content type="html"><div><p>a simple circuit using a TL072 op-amp and 74LS14 inverter for getting a clear digital trigger signal based on the sound level detected by an electret microphone</p><img src="https://leap.tardate.com/electronics101/electret/soundleveltrigger/assets/soundleveltrigger_build.jpg" /></div></content> <category term="Electret"/> <category term="Audio"/> <category term="Sensors"/> </entry> <entry> <id>https://leap.tardate.com/playground/led7segment/tm1638/</id> <link href="https://leap.tardate.com/playground/led7segment/tm1638/"/> <g:image_link>https://leap.tardate.com/playground/led7segment/tm1638/assets/tm1638_build.jpg</g:image_link> <updated>2019-05-06T15:55:26Z</updated> <title>#481 TM1638 7-Segment LED Driver</title> <summary>investigating the capabilities of the TM1638 as a 7-segment display driver and key pad controller</summary> <content type="html"><div><p>investigating the capabilities of the TM1638 as a 7-segment display driver and key pad controller</p><img src="https://leap.tardate.com/playground/led7segment/tm1638/assets/tm1638_build.jpg" /></div></content> <category term="LED 7-Segment"/> <category term="Arduino"/> <category term="LED"/> <category term="TM1638"/> </entry> <entry> <id>https://leap.tardate.com/playground/led7segment/</id> <link href="https://leap.tardate.com/playground/led7segment/"/> <g:image_link>https://leap.tardate.com/playground/led7segment/assets/led7segment_build.jpg</g:image_link> <updated>2019-05-05T15:19:57Z</updated> <title>#480 7-Segment LED Displays</title> <summary>All about LED 7-segment displays</summary> <content type="html"><div><p>All about LED 7-segment displays</p><img src="https://leap.tardate.com/playground/led7segment/assets/led7segment_build.jpg" /></div></content> <category term="LED 7-Segment"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/playground/led7segment/max7219/ledcontroldemo/</id> <link href="https://leap.tardate.com/playground/led7segment/max7219/ledcontroldemo/"/> <g:image_link>https://leap.tardate.com/playground/led7segment/max7219/ledcontroldemo/assets/ledcontroldemo_build.jpg</g:image_link> <updated>2019-05-05T11:59:19Z</updated> <title>#479 LedControl MAX7219 7-Segment LED Driver</title> <summary>Driving a series of 7-segment LED displays with the MAX7219 and the LedControl library</summary> <content type="html"><div><p>Driving a series of 7-segment LED displays with the MAX7219 and the LedControl library</p><img src="https://leap.tardate.com/playground/led7segment/max7219/ledcontroldemo/assets/ledcontroldemo_build.jpg" /></div></content> <category term="LED 7-Segment"/> <category term="Arduino"/> <category term="LED"/> <category term="MAX7219"/> </entry> <entry> <id>https://leap.tardate.com/playground/led7segment/max7219/rawdrive/</id> <link href="https://leap.tardate.com/playground/led7segment/max7219/rawdrive/"/> <g:image_link>https://leap.tardate.com/playground/led7segment/max7219/rawdrive/assets/rawdrive_build.jpg</g:image_link> <updated>2019-05-02T16:17:15Z</updated> <title>#478 Raw MAX7219 7-Segment LED Driver</title> <summary>Driving a series of 7-segment LED displays with the MAX7219 and raw SPI commands</summary> <content type="html"><div><p>Driving a series of 7-segment LED displays with the MAX7219 and raw SPI commands</p><img src="https://leap.tardate.com/playground/led7segment/max7219/rawdrive/assets/rawdrive_build.jpg" /></div></content> <category term="LED 7-Segment"/> <category term="Arduino"/> <category term="LED"/> <category term="MAX7219"/> </entry> <entry> <id>https://leap.tardate.com/audio/rakitdrumsynth/</id> <link href="https://leap.tardate.com/audio/rakitdrumsynth/"/> <g:image_link>https://leap.tardate.com/audio/rakitdrumsynth/assets/rakitdrumsynth_build.jpg</g:image_link> <updated>2019-04-29T16:03:38Z</updated> <title>#477 Rakit Drum Synth</title> <summary>building the Rakit Drum Synth kit - a very nicely produced clone of the classic Boss PC-2/AMDEK PCK-100 percussion synthesizer</summary> <content type="html"><div><p>building the Rakit Drum Synth kit - a very nicely produced clone of the classic Boss PC-2/AMDEK PCK-100 percussion synthesizer</p><img src="https://leap.tardate.com/audio/rakitdrumsynth/assets/rakitdrumsynth_build.jpg" /></div></content> <category term="Audio"/> <category term="Drum"/> <category term="Synth"/> <category term="Music"/> </entry> <entry> <id>https://leap.tardate.com/radio/fm/simplestdirectreceiver/</id> <link href="https://leap.tardate.com/radio/fm/simplestdirectreceiver/"/> <g:image_link>https://leap.tardate.com/radio/fm/simplestdirectreceiver/assets/simplestdirectreceiver_build.jpg</g:image_link> <updated>2019-04-09T14:01:34Z</updated> <title>#476 Simplest Direct FM Receiver</title> <summary>Taming a very simple direct conversion FM receiver</summary> <content type="html"><div><p>Taming a very simple direct conversion FM receiver</p><img src="https://leap.tardate.com/radio/fm/simplestdirectreceiver/assets/simplestdirectreceiver_build.jpg" /></div></content> <category term="Radio"/> <category term="FM"/> </entry> <entry> <id>https://leap.tardate.com/equipment/ang860b/</id> <link href="https://leap.tardate.com/equipment/ang860b/"/> <g:image_link>https://leap.tardate.com/equipment/ang860b/assets/ang860b_build.jpg</g:image_link> <updated>2019-04-27T09:24:58Z</updated> <title>#475 ANG860B</title> <summary>specifications and notes on the ANENG ANG860B+ digital multimeter</summary> <content type="html"><div><p>specifications and notes on the ANENG ANG860B+ digital multimeter</p><img src="https://leap.tardate.com/equipment/ang860b/assets/ang860b_build.jpg" /></div></content> <category term="Tools"/> <category term="Test Equipment"/> <category term="DMM"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioeffects/whitenoisegenerator/</id> <link href="https://leap.tardate.com/audio/audioeffects/whitenoisegenerator/"/> <g:image_link>https://leap.tardate.com/audio/audioeffects/whitenoisegenerator/assets/whitenoisegenerator_build.jpg</g:image_link> <updated>2020-06-06T05:35:40Z</updated> <title>#474 BJT White Noise Generator</title> <summary>Building a common white noise generator circuit and optimising it for 9V operation with BC337 transistors</summary> <content type="html"><div><p>Building a common white noise generator circuit and optimising it for 9V operation with BC337 transistors</p><img src="https://leap.tardate.com/audio/audioeffects/whitenoisegenerator/assets/whitenoisegenerator_build.jpg" /></div></content> <category term="Audio"/> <category term="BJT"/> </entry> <entry> <id>https://leap.tardate.com/kraft/xdiskclk/</id> <link href="https://leap.tardate.com/kraft/xdiskclk/"/> <g:image_link>https://leap.tardate.com/kraft/xdiskclk/assets/xdiskclk_build.jpg</g:image_link> <updated>2019-04-22T12:07:30Z</updated> <title>#473 xdiskclk</title> <summary>An old 3.5 inch disk drive was begging to be disassembled and transformed with the addition of a simple clock mechanism to produce the ex-disk-clock</summary> <content type="html"><div><p>An old 3.5 inch disk drive was begging to be disassembled and transformed with the addition of a simple clock mechanism to produce the ex-disk-clock</p><img src="https://leap.tardate.com/kraft/xdiskclk/assets/xdiskclk_build.jpg" /></div></content> <category term="Craft"/> <category term="Clock"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/capacitivedropper/</id> <link href="https://leap.tardate.com/electronics101/power/capacitivedropper/"/> <g:image_link>https://leap.tardate.com/electronics101/power/capacitivedropper/assets/capacitivedropper_build.jpg</g:image_link> <updated>2019-04-21T04:37:13Z</updated> <title>#472 Capacitive Dropper</title> <summary>Understanding how to design a capacitive dropper, and demonstration with a low-voltage LED driver circuit</summary> <content type="html"><div><p>Understanding how to design a capacitive dropper, and demonstration with a low-voltage LED driver circuit</p><img src="https://leap.tardate.com/electronics101/power/capacitivedropper/assets/capacitivedropper_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/fluorescentringreplacement/</id> <link href="https://leap.tardate.com/electronics101/led/fluorescentringreplacement/"/> <g:image_link>https://leap.tardate.com/electronics101/led/fluorescentringreplacement/assets/fluorescentringreplacement_build.jpg</g:image_link> <updated>2019-04-20T06:51:08Z</updated> <title>#471 Fluorescent Ring LED Replacement</title> <summary>Understanding fluorescent lighting and installing an LED replacement</summary> <content type="html"><div><p>Understanding fluorescent lighting and installing an LED replacement</p><img src="https://leap.tardate.com/electronics101/led/fluorescentringreplacement/assets/fluorescentringreplacement_build.jpg" /></div></content> <category term="LED"/> <category term="Power"/> <category term="Lighting"/> </entry> <entry> <id>https://leap.tardate.com/radio/am/simplecrystaltransmitter/</id> <link href="https://leap.tardate.com/radio/am/simplecrystaltransmitter/"/> <g:image_link>https://leap.tardate.com/radio/am/simplecrystaltransmitter/assets/simplecrystaltransmitter_build.jpg</g:image_link> <updated>2019-04-17T16:44:14Z</updated> <title>#470 Simple Crystal AM Transmitter</title> <summary>building a classic crystal-locked AM transmitter with a 1MHz MCO-1510A CMOS crystal oscillator</summary> <content type="html"><div><p>building a classic crystal-locked AM transmitter with a 1MHz MCO-1510A CMOS crystal oscillator</p><img src="https://leap.tardate.com/radio/am/simplecrystaltransmitter/assets/simplecrystaltransmitter_build.jpg" /></div></content> <category term="Radio"/> <category term="AM"/> <category term="Transmitter"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/breadboardbling/lm386audioamp/</id> <link href="https://leap.tardate.com/electronics101/breadboardbling/lm386audioamp/"/> <g:image_link>https://leap.tardate.com/electronics101/breadboardbling/lm386audioamp/assets/lm386audioamp_build.jpg</g:image_link> <updated>2019-04-15T12:24:50Z</updated> <title>#469 LM386 Audio Amp</title> <summary>A basic LM386 audio amplifier with volume and gain control on a breadboard-compatible mounting</summary> <content type="html"><div><p>A basic LM386 audio amplifier with volume and gain control on a breadboard-compatible mounting</p><img src="https://leap.tardate.com/electronics101/breadboardbling/lm386audioamp/assets/lm386audioamp_build.jpg" /></div></content> <category term="Breadboard Bling"/> <category term="Audio"/> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/breadboardbling/duplextuningcapacitor/</id> <link href="https://leap.tardate.com/electronics101/breadboardbling/duplextuningcapacitor/"/> <g:image_link>https://leap.tardate.com/electronics101/breadboardbling/duplextuningcapacitor/assets/duplextuningcapacitor_build.jpg</g:image_link> <updated>2019-04-09T14:49:26Z</updated> <title>#468 Duplex Tuning Capacitor</title> <summary>making a breadboard-compatible variable capacitor for radio circuits</summary> <content type="html"><div><p>making a breadboard-compatible variable capacitor for radio circuits</p><img src="https://leap.tardate.com/electronics101/breadboardbling/duplextuningcapacitor/assets/duplextuningcapacitor_build.jpg" /></div></content> <category term="Breadboard Bling"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/radio/fm/twostagetransmitter/</id> <link href="https://leap.tardate.com/radio/fm/twostagetransmitter/"/> <g:image_link>https://leap.tardate.com/radio/fm/twostagetransmitter/assets/twostagetransmitter_build.jpg</g:image_link> <updated>2015-08-24T02:03:26Z</updated> <title>#467 Two-stage FM Transmitter</title> <summary>build and test a simple two-stage FM transmitter</summary> <content type="html"><div><p>build and test a simple two-stage FM transmitter</p><img src="https://leap.tardate.com/radio/fm/twostagetransmitter/assets/twostagetransmitter_build.jpg" /></div></content> <category term="Radio"/> <category term="FM"/> </entry> <entry> <id>https://leap.tardate.com/equipment/vc3165/</id> <link href="https://leap.tardate.com/equipment/vc3165/"/> <g:image_link>https://leap.tardate.com/equipment/vc3165/assets/vc3165_build.jpg</g:image_link> <updated>2019-04-07T03:06:05Z</updated> <title>#466 VC3165</title> <summary>all about the Victor VC3165 frequency counter</summary> <content type="html"><div><p>all about the Victor VC3165 frequency counter</p><img src="https://leap.tardate.com/equipment/vc3165/assets/vc3165_build.jpg" /></div></content> <category term="Tools"/> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/bjt/mrbijut/</id> <link href="https://leap.tardate.com/electronics101/bjt/mrbijut/"/> <g:image_link>https://leap.tardate.com/electronics101/bjt/mrbijut/assets/mrbijut_build.jpg</g:image_link> <updated>2021-04-05T08:52:23Z</updated> <title>#465 MrBiJuT</title> <summary>Mr BiJuT is a freeform realisation of a simple NPN/PNP transistor testing circuit using a CD4011 Schmitt oscillator</summary> <content type="html"><div><p>Mr BiJuT is a freeform realisation of a simple NPN/PNP transistor testing circuit using a CD4011 Schmitt oscillator</p><img src="https://leap.tardate.com/electronics101/bjt/mrbijut/assets/mrbijut_build.jpg" /></div></content> <category term="BJT"/> <category term="Test Equipment"/> <category term="Oscillators"/> <category term="Circuit Sculpture"/> <category term="Freeform"/> </entry> <entry> <id>https://leap.tardate.com/radio/am/singletransistortransmitter/</id> <link href="https://leap.tardate.com/radio/am/singletransistortransmitter/"/> <g:image_link>https://leap.tardate.com/radio/am/singletransistortransmitter/assets/singletransistortransmitter_build.jpg</g:image_link> <updated>2019-04-04T16:28:29Z</updated> <title>#464 Single Transistor AM Transmitter</title> <summary>building a low power, single transistor AM transmitter with surprisingly good fidelity</summary> <content type="html"><div><p>building a low power, single transistor AM transmitter with surprisingly good fidelity</p><img src="https://leap.tardate.com/radio/am/singletransistortransmitter/assets/singletransistortransmitter_build.jpg" /></div></content> <category term="Radio"/> <category term="AM"/> <category term="Transmitter"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/opamp/transconductance/</id> <link href="https://leap.tardate.com/electronics101/opamp/transconductance/"/> <g:image_link>https://leap.tardate.com/electronics101/opamp/transconductance/assets/transconductance_build.jpg</g:image_link> <updated>2021-08-17T08:14:50Z</updated> <title>#463 OpAmp Transconductance Amplifiers</title> <summary>understanding transconductance amplifiers and how they can be realised with an op-amp, and testing both single and dual-supply transconductance circuits based on an LM741 op-amp</summary> <content type="html"><div><p>understanding transconductance amplifiers and how they can be realised with an op-amp, and testing both single and dual-supply transconductance circuits based on an LM741 op-amp</p><img src="https://leap.tardate.com/electronics101/opamp/transconductance/assets/transconductance_build.jpg" /></div></content> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/radio/am/hx108-2/</id> <link href="https://leap.tardate.com/radio/am/hx108-2/"/> <g:image_link>https://leap.tardate.com/radio/am/hx108-2/assets/hx108-2_build.jpg</g:image_link> <updated>2019-03-12T16:07:00Z</updated> <title>#462 HX108-2</title> <summary>build and analyse the HX108-2 superheterodyne AM MW radio receiver kit</summary> <content type="html"><div><p>build and analyse the HX108-2 superheterodyne AM MW radio receiver kit</p><img src="https://leap.tardate.com/radio/am/hx108-2/assets/hx108-2_build.jpg" /></div></content> <category term="Radio"/> <category term="AM"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/guitareffects/goblin/</id> <link href="https://leap.tardate.com/electronics101/guitareffects/goblin/"/> <g:image_link>https://leap.tardate.com/electronics101/guitareffects/goblin/assets/goblin_build.jpg</g:image_link> <updated>2016-08-28T13:00:37Z</updated> <title>#461 Goblin</title> <summary>the Goblin is what I'm calling my remake of the classic Ibanez Tube Screamer 808, after researching how the circuit works and common modifications</summary> <content type="html"><div><p>the Goblin is what I'm calling my remake of the classic Ibanez Tube Screamer 808, after researching how the circuit works and common modifications</p><img src="https://leap.tardate.com/electronics101/guitareffects/goblin/assets/goblin_build.jpg" /></div></content> <category term="Guitar Effects"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioeffects/canary/</id> <link href="https://leap.tardate.com/audio/audioeffects/canary/"/> <g:image_link>https://leap.tardate.com/audio/audioeffects/canary/assets/canary_build.jpg</g:image_link> <updated>2020-06-06T05:35:40Z</updated> <title>#460 CANary</title> <summary>playing with a popular 74HC14 bird chirp effect by Wilf Rigter and making a CANary sculpture</summary> <content type="html"><div><p>playing with a popular 74HC14 bird chirp effect by Wilf Rigter and making a CANary sculpture</p><img src="https://leap.tardate.com/audio/audioeffects/canary/assets/canary_build.jpg" /></div></content> <category term="BEAM"/> <category term="Oscillators"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/opamp/twinteeoscillator/</id> <link href="https://leap.tardate.com/electronics101/opamp/twinteeoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/opamp/twinteeoscillator/assets/twinteeoscillator_build.jpg</g:image_link> <updated>2021-08-17T08:14:50Z</updated> <title>#459 Twin-Tee OpAmp Oscillator</title> <summary>a twin-tee sine wave oscillator using an TL072 Op-Amp, running in the audio spectrum</summary> <content type="html"><div><p>a twin-tee sine wave oscillator using an TL072 Op-Amp, running in the audio spectrum</p><img src="https://leap.tardate.com/electronics101/opamp/twinteeoscillator/assets/twinteeoscillator_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/playground/fastanalogread/</id> <link href="https://leap.tardate.com/playground/fastanalogread/"/> <g:image_link>https://leap.tardate.com/playground/fastanalogread/assets/fastanalogread_build.jpg</g:image_link> <updated>2019-03-01T11:05:56Z</updated> <title>#458 FastAnalogRead</title> <summary>how to increase the Arduino ADC analog sampling rate</summary> <content type="html"><div><p>how to increase the Arduino ADC analog sampling rate</p><img src="https://leap.tardate.com/playground/fastanalogread/assets/fastanalogread_build.jpg" /></div></content> <category term="Arduino"/> <category term="GPIO"/> </entry> <entry> <id>https://leap.tardate.com/playground/precisiontimer/</id> <link href="https://leap.tardate.com/playground/precisiontimer/"/> <g:image_link>https://leap.tardate.com/playground/precisiontimer/assets/precisiontimer_build.jpg</g:image_link> <updated>2015-03-03T16:00:36Z</updated> <title>#457 Precision Timer</title> <summary>comparing the precision and constraints of various methods for timing an operation with an Atmega328, with some discussion of the timer/counter features of the chip</summary> <content type="html"><div><p>comparing the precision and constraints of various methods for timing an operation with an Atmega328, with some discussion of the timer/counter features of the chip</p><img src="https://leap.tardate.com/playground/precisiontimer/assets/precisiontimer_build.jpg" /></div></content> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/pease-out/</id> <link href="https://leap.tardate.com/boldportclub/pease-out/"/> <g:image_link>https://leap.tardate.com/boldportclub/pease-out/assets/pease-out_build.jpg</g:image_link> <updated>2019-02-17T16:42:48Z</updated> <title>#456 BoldportClub/pease-out</title> <summary>an audio voltage indicator based on the Boldport Club Pease-out, Project #32 Jan 2019</summary> <content type="html"><div><p>an audio voltage indicator based on the Boldport Club Pease-out, Project #32 Jan 2019</p><img src="https://leap.tardate.com/boldportclub/pease-out/assets/pease-out_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="LM331"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/piezobuzzers/</id> <link href="https://leap.tardate.com/electronics101/piezobuzzers/"/> <g:image_link>https://leap.tardate.com/electronics101/piezobuzzers/assets/piezobuzzers_build.jpg</g:image_link> <updated>2021-08-17T08:14:50Z</updated> <title>#455 Piezo Transducers and Buzzers</title> <summary>exploring techniques for driving piezo transducers and buzzer units for audio output</summary> <content type="html"><div><p>exploring techniques for driving piezo transducers and buzzer units for audio output</p><img src="https://leap.tardate.com/electronics101/piezobuzzers/assets/piezobuzzers_build.jpg" /></div></content> <category term="Oscillators"/> <category term="Crystal"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/voltagereference/adr4540/</id> <link href="https://leap.tardate.com/electronics101/voltagereference/adr4540/"/> <g:image_link>https://leap.tardate.com/electronics101/voltagereference/adr4540/assets/adr4540_build.jpg</g:image_link> <updated>2019-02-17T07:12:32Z</updated> <title>#454 ADR4540 Voltage Reference</title> <summary>exploring the ADR4540 precision reference, tested with an Arduino as an external voltage reference</summary> <content type="html"><div><p>exploring the ADR4540 precision reference, tested with an Arduino as an external voltage reference</p><img src="https://leap.tardate.com/electronics101/voltagereference/adr4540/assets/adr4540_build.jpg" /></div></content> <category term="Voltage Reference"/> <category term="ADR4540"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/breadboardbling/potmodules/</id> <link href="https://leap.tardate.com/electronics101/breadboardbling/potmodules/"/> <g:image_link>https://leap.tardate.com/electronics101/breadboardbling/potmodules/assets/potmodules_build.jpg</g:image_link> <updated>2019-02-17T07:12:51Z</updated> <title>#453 PotModules</title> <summary>Making some breadboard-compatible potentiometers and covering some basics of terminology, Ohm's Law and voltage dividers</summary> <content type="html"><div><p>Making some breadboard-compatible potentiometers and covering some basics of terminology, Ohm's Law and voltage dividers</p><img src="https://leap.tardate.com/electronics101/breadboardbling/potmodules/assets/potmodules_build.jpg" /></div></content> <category term="Breadboard Bling"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd4046/mainslinkedpll/</id> <link href="https://leap.tardate.com/electronics101/cd4046/mainslinkedpll/"/> <g:image_link>https://leap.tardate.com/electronics101/cd4046/mainslinkedpll/assets/mainslinkedpll_build.jpg</g:image_link> <updated>2019-02-08T01:32:20Z</updated> <title>#452 CD4046 Mains-Linked PLL</title> <summary>A 50/60Hz oscillator locked to mains power frequency using the CD4046 PLL</summary> <content type="html"><div><p>A 50/60Hz oscillator locked to mains power frequency using the CD4046 PLL</p><img src="https://leap.tardate.com/electronics101/cd4046/mainslinkedpll/assets/mainslinkedpll_build.jpg" /></div></content> <category term="Oscillators"/> <category term="PLL"/> <category term="CMOS/TTL"/> <category term="CD4046"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/arcgeneratorkit/</id> <link href="https://leap.tardate.com/electronics101/arcgeneratorkit/"/> <g:image_link>https://leap.tardate.com/electronics101/arcgeneratorkit/assets/arcgeneratorkit_build.jpg</g:image_link> <updated>2019-02-05T17:04:25Z</updated> <title>#451 Arc Generator Kit</title> <summary>playing with a high-voltage arc generator kit that uses step-up transformer with a simple feedback control of a D882 power transistor</summary> <content type="html"><div><p>playing with a high-voltage arc generator kit that uses step-up transformer with a simple feedback control of a D882 power transistor</p><img src="https://leap.tardate.com/electronics101/arcgeneratorkit/assets/arcgeneratorkit_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/equipment/lcr45/</id> <link href="https://leap.tardate.com/equipment/lcr45/"/> <g:image_link>https://leap.tardate.com/equipment/lcr45/assets/lcr45_build.jpg</g:image_link> <updated>2019-02-04T15:46:38Z</updated> <title>#450 LCR45</title> <summary>evaluating the Peak LCR45 inductance, capacitance and resistance meter</summary> <content type="html"><div><p>evaluating the Peak LCR45 inductance, capacitance and resistance meter</p><img src="https://leap.tardate.com/equipment/lcr45/assets/lcr45_build.jpg" /></div></content> <category term="Tools"/> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioeffects/parrot/</id> <link href="https://leap.tardate.com/audio/audioeffects/parrot/"/> <g:image_link>https://leap.tardate.com/audio/audioeffects/parrot/assets/parrot_build.jpg</g:image_link> <updated>2020-06-06T05:35:40Z</updated> <title>#449 Parrot</title> <summary>playing with a 1-transistor, dual oscillator chirping sound effect circuit</summary> <content type="html"><div><p>playing with a 1-transistor, dual oscillator chirping sound effect circuit</p><img src="https://leap.tardate.com/audio/audioeffects/parrot/assets/parrot_build.jpg" /></div></content> <category term="Audio"/> <category term="BEAM"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/adc/ltc2400/</id> <link href="https://leap.tardate.com/electronics101/adc/ltc2400/"/> <g:image_link>https://leap.tardate.com/electronics101/adc/ltc2400/assets/ltc2400_build.jpg</g:image_link> <updated>2019-01-15T00:35:29Z</updated> <title>#448 LTC2400</title> <summary>exploring the tips and traps involved in getting accurate readings from the LTC2400 24-bit ADC</summary> <content type="html"><div><p>exploring the tips and traps involved in getting accurate readings from the LTC2400 24-bit ADC</p><img src="https://leap.tardate.com/electronics101/adc/ltc2400/assets/ltc2400_build.jpg" /></div></content> <category term="ADC"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/capacimeter/</id> <link href="https://leap.tardate.com/boldportclub/capacimeter/"/> <g:image_link>https://leap.tardate.com/boldportclub/capacimeter/assets/capacimeter_build.jpg</g:image_link> <updated>2021-11-23T11:14:19Z</updated> <title>#447 Capacimeter</title> <summary>measuring capacitance with old-school 555 and 4017 digital logic - a Boldport Club remix of a PEAK, Project #31, December 2018</summary> <content type="html"><div><p>measuring capacitance with old-school 555 and 4017 digital logic - a Boldport Club remix of a PEAK, Project #31, December 2018</p><img src="https://leap.tardate.com/boldportclub/capacimeter/assets/capacimeter_build.jpg" /></div></content> <category term="Boldport"/> <category term="Tools"/> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/toroidjoulethief/rgbnightlight/</id> <link href="https://leap.tardate.com/electronics101/toroidjoulethief/rgbnightlight/"/> <g:image_link>https://leap.tardate.com/electronics101/toroidjoulethief/rgbnightlight/assets/rgbnightlight_build.jpg</g:image_link> <updated>2019-01-06T11:36:40Z</updated> <title>#446 RGB Joule Thief Night Light</title> <summary>testing a slow-flash RGB LED with a 1.5V joule thief power supply</summary> <content type="html"><div><p>testing a slow-flash RGB LED with a 1.5V joule thief power supply</p><img src="https://leap.tardate.com/electronics101/toroidjoulethief/rgbnightlight/assets/rgbnightlight_build.jpg" /></div></content> <category term="LED"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/variabledutycycle/controladjust/</id> <link href="https://leap.tardate.com/electronics101/555timer/variabledutycycle/controladjust/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/variabledutycycle/controladjust/assets/controladjust_build.jpg</g:image_link> <updated>2019-01-01T13:26:18Z</updated> <title>#445 VariableDutyCycle/ControlAdjust</title> <summary>using the control pin to adjust duty cycle of a 555 Timer astable oscillator</summary> <content type="html"><div><p>using the control pin to adjust duty cycle of a 555 Timer astable oscillator</p><img src="https://leap.tardate.com/electronics101/555timer/variabledutycycle/controladjust/assets/controladjust_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/variabledutycycle/diodesteering/</id> <link href="https://leap.tardate.com/electronics101/555timer/variabledutycycle/diodesteering/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/variabledutycycle/diodesteering/assets/diodesteering_build.jpg</g:image_link> <updated>2019-01-01T10:53:01Z</updated> <title>#444 VariableDutyCycle/DiodeSteering</title> <summary>using diode steering to achieve adjustable duty cycle at fixed frequency in a 555 Timer astable oscillator</summary> <content type="html"><div><p>using diode steering to achieve adjustable duty cycle at fixed frequency in a 555 Timer astable oscillator</p><img src="https://leap.tardate.com/electronics101/555timer/variabledutycycle/diodesteering/assets/diodesteering_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/arm/stm32f103c8t6/bluepill/lcd16x2/</id> <link href="https://leap.tardate.com/arm/stm32f103c8t6/bluepill/lcd16x2/"/> <g:image_link>https://leap.tardate.com/arm/stm32f103c8t6/bluepill/lcd16x2/assets/lcd16x2_build.jpg</g:image_link> <updated>2020-05-24T09:47:27Z</updated> <title>#443 BluePill 16x2 LCD</title> <summary>using a 16x2 LCD with an ARM Cortex-M3 STM32F103C8T6 Blue Pill board and programmed the Arduino IDE</summary> <content type="html"><div><p>using a 16x2 LCD with an ARM Cortex-M3 STM32F103C8T6 Blue Pill board and programmed the Arduino IDE</p><img src="https://leap.tardate.com/arm/stm32f103c8t6/bluepill/lcd16x2/assets/lcd16x2_build.jpg" /></div></content> <category term="STM32"/> <category term="LCD"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/respot/</id> <link href="https://leap.tardate.com/boldportclub/respot/"/> <g:image_link>https://leap.tardate.com/boldportclub/respot/assets/respot_build.jpg</g:image_link> <updated>2019-01-13T09:31:21Z</updated> <title>#442 BoldportClub/respot</title> <summary>Boldport puts the "pot" back in the resistance, a classic decade resistor box in custom pots</summary> <content type="html"><div><p>Boldport puts the "pot" back in the resistance, a classic decade resistor box in custom pots</p><img src="https://leap.tardate.com/boldportclub/respot/assets/respot_build.jpg" /></div></content> <category term="Boldport"/> <category term="Tools"/> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/kraft/pollen8/</id> <link href="https://leap.tardate.com/kraft/pollen8/"/> <g:image_link>https://leap.tardate.com/kraft/pollen8/assets/pollen8_build.jpg</g:image_link> <updated>2021-04-05T08:52:23Z</updated> <title>#441 Pollen8</title> <summary>a freeform wire sculpture with LEDs driven by a light-sensitive 555/4017 counter circuit</summary> <content type="html"><div><p>a freeform wire sculpture with LEDs driven by a light-sensitive 555/4017 counter circuit</p><img src="https://leap.tardate.com/kraft/pollen8/assets/pollen8_build.jpg" /></div></content> <category term="LED"/> <category term="CMOS/TTL"/> <category term="555 Timer"/> <category term="Craft"/> <category term="Circuit Sculpture"/> <category term="Freeform"/> </entry> <entry> <id>https://leap.tardate.com/playground/datalogging/voltagetoadafruitio/</id> <link href="https://leap.tardate.com/playground/datalogging/voltagetoadafruitio/"/> <g:image_link>https://leap.tardate.com/playground/datalogging/voltagetoadafruitio/assets/voltagetoadafruitio_build.jpg</g:image_link> <updated>2018-12-18T16:06:04Z</updated> <title>#440 DataLogging/VoltageToAdafruitIO</title> <summary>using Adafruit IO and an Ethernet shield to collect analog measurements to the cloud with MQTT</summary> <content type="html"><div><p>using Adafruit IO and an Ethernet shield to collect analog measurements to the cloud with MQTT</p><img src="https://leap.tardate.com/playground/datalogging/voltagetoadafruitio/assets/voltagetoadafruitio_build.jpg" /></div></content> <category term="Sensors"/> <category term="Cloud"/> <category term="MQTT"/> <category term="Data Logging"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/leddrivers/qx5252solarnightlight/</id> <link href="https://leap.tardate.com/electronics101/leddrivers/qx5252solarnightlight/"/> <g:image_link>https://leap.tardate.com/electronics101/leddrivers/qx5252solarnightlight/assets/qx5252solarnightlight_build.jpg</g:image_link> <updated>2018-12-11T01:21:16Z</updated> <title>#439 QX5252SolarNightLight</title> <summary>exploring the circuit inside most garden solar lights, which uses a QX5252/YX805 boost and charge controller</summary> <content type="html"><div><p>exploring the circuit inside most garden solar lights, which uses a QX5252/YX805 boost and charge controller</p><img src="https://leap.tardate.com/electronics101/leddrivers/qx5252solarnightlight/assets/qx5252solarnightlight_build.jpg" /></div></content> <category term="Power"/> <category term="LED"/> <category term="Solar"/> </entry> <entry> <id>https://leap.tardate.com/playground/rfid/devicedumper/</id> <link href="https://leap.tardate.com/playground/rfid/devicedumper/"/> <g:image_link>https://leap.tardate.com/playground/rfid/devicedumper/assets/devicedumper_build.jpg</g:image_link> <updated>2019-06-04T23:46:11Z</updated> <title>#438 RFID Device Dumper</title> <summary>getting started with some RFID research and using an RC522 RFID reader with MIFARE Classic cards and tags</summary> <content type="html"><div><p>getting started with some RFID research and using an RC522 RFID reader with MIFARE Classic cards and tags</p><img src="https://leap.tardate.com/playground/rfid/devicedumper/assets/devicedumper_build.jpg" /></div></content> <category term="RFID"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/leddrivers/qx5252joulethief/</id> <link href="https://leap.tardate.com/electronics101/leddrivers/qx5252joulethief/"/> <g:image_link>https://leap.tardate.com/electronics101/leddrivers/qx5252joulethief/assets/qx5252joulethief_build.jpg</g:image_link> <updated>2018-11-25T12:58:31Z</updated> <title>#437 QX5252JouleThief</title> <summary>using a QX5252/YX805 LED driver chip as a joule thief for driving an LED from a low-voltage battery</summary> <content type="html"><div><p>using a QX5252/YX805 LED driver chip as a joule thief for driving an LED from a low-voltage battery</p><img src="https://leap.tardate.com/electronics101/leddrivers/qx5252joulethief/assets/qx5252joulethief_build.jpg" /></div></content> <category term="Power"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/beam/vivian/</id> <link href="https://leap.tardate.com/kinetics/beam/vivian/"/> <g:image_link>https://leap.tardate.com/kinetics/beam/vivian/assets/vivian_build.jpg</g:image_link> <updated>2018-11-25T05:17:29Z</updated> <title>#436 Vivian</title> <summary>a BEAM Vibrobot using a classic solar-powered FLED circuit enhanced with a QX5252/YX805 solar LED driver</summary> <content type="html"><div><p>a BEAM Vibrobot using a classic solar-powered FLED circuit enhanced with a QX5252/YX805 solar LED driver</p><img src="https://leap.tardate.com/kinetics/beam/vivian/assets/vivian_build.jpg" /></div></content> <category term="BEAM"/> <category term="Robotics"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/beam/</id> <link href="https://leap.tardate.com/kinetics/beam/"/> <g:image_link>https://leap.tardate.com/kinetics/beam/assets/beam_build.jpg</g:image_link> <updated>2018-11-25T03:01:25Z</updated> <title>#435 BEAM</title> <summary>a quick survey of the BEAM (Biology, Electronics, Aesthetics and Mechanics) field</summary> <content type="html"><div><p>a quick survey of the BEAM (Biology, Electronics, Aesthetics and Mechanics) field</p><img src="https://leap.tardate.com/kinetics/beam/assets/beam_build.jpg" /></div></content> <category term="BEAM"/> <category term="Robotics"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/krell/</id> <link href="https://leap.tardate.com/boldportclub/krell/"/> <g:image_link>https://leap.tardate.com/boldportclub/krell/assets/krell_build.jpg</g:image_link> <updated>2018-11-12T15:37:26Z</updated> <title>#434 BoldportClub/krell</title> <summary>building the Boldport Krell: a handheld DSP synthesiser built around a Microchip dsPIC and a design from madlab</summary> <content type="html"><div><p>building the Boldport Krell: a handheld DSP synthesiser built around a Microchip dsPIC and a design from madlab</p><img src="https://leap.tardate.com/boldportclub/krell/assets/krell_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/equipment/adjustablepowersupplykit/</id> <link href="https://leap.tardate.com/equipment/adjustablepowersupplykit/"/> <g:image_link>https://leap.tardate.com/equipment/adjustablepowersupplykit/assets/adjustablepowersupplykit_build.jpg</g:image_link> <updated>2018-07-10T06:51:01Z</updated> <title>#433 AdjustablePowerSupplyKit</title> <summary>building a popular 30V/3A adjustable power supply kit, making an enclosure and testing</summary> <content type="html"><div><p>building a popular 30V/3A adjustable power supply kit, making an enclosure and testing</p><img src="https://leap.tardate.com/equipment/adjustablepowersupplykit/assets/adjustablepowersupplykit_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/steppermotors/uln2003module/</id> <link href="https://leap.tardate.com/kinetics/steppermotors/uln2003module/"/> <g:image_link>https://leap.tardate.com/kinetics/steppermotors/uln2003module/assets/uln2003module_build.jpg</g:image_link> <updated>2018-11-04T11:41:34Z</updated> <title>#432 StepperMotors/ULN2003Module</title> <summary>investigating the common ULN2003A modules provided for unipolar stepper motor control - this one is identified as X113647</summary> <content type="html"><div><p>investigating the common ULN2003A modules provided for unipolar stepper motor control - this one is identified as X113647</p><img src="https://leap.tardate.com/kinetics/steppermotors/uln2003module/assets/uln2003module_build.jpg" /></div></content> <category term="Stepper"/> <category term="ULN2003"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/steppermotors/28byj48/</id> <link href="https://leap.tardate.com/kinetics/steppermotors/28byj48/"/> <g:image_link>https://leap.tardate.com/kinetics/steppermotors/28byj48/assets/28byj48_build.jpg</g:image_link> <updated>2018-11-04T09:36:43Z</updated> <title>#431 StepperMotors/28BYJ48</title> <summary>all about the 28BYJ-48 unipolar stepper motor and driving it with an Arduino</summary> <content type="html"><div><p>all about the 28BYJ-48 unipolar stepper motor and driving it with an Arduino</p><img src="https://leap.tardate.com/kinetics/steppermotors/28byj48/assets/28byj48_build.jpg" /></div></content> <category term="Stepper"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/steppermotors/bipolarwormdrive/simplehbridge/</id> <link href="https://leap.tardate.com/kinetics/steppermotors/bipolarwormdrive/simplehbridge/"/> <g:image_link>https://leap.tardate.com/kinetics/steppermotors/bipolarwormdrive/simplehbridge/assets/simplehbridge_build.jpg</g:image_link> <updated>2018-11-03T01:22:15Z</updated> <title>#430 BipolarWormDrive/SimpleHBridge</title> <summary>testing some linear/worm-drive stepper motors salvaged from a DVD drive unit, using a bespoke H-bridge circuit and Arduino .. or pushbuttons!</summary> <content type="html"><div><p>testing some linear/worm-drive stepper motors salvaged from a DVD drive unit, using a bespoke H-bridge circuit and Arduino .. or pushbuttons!</p><img src="https://leap.tardate.com/kinetics/steppermotors/bipolarwormdrive/simplehbridge/assets/simplehbridge_build.jpg" /></div></content> <category term="Stepper"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/3x7/pomodorotimer/</id> <link href="https://leap.tardate.com/boldportclub/3x7/pomodorotimer/"/> <g:image_link>https://leap.tardate.com/boldportclub/3x7/pomodorotimer/assets/pomodorotimer_build.jpg</g:image_link> <updated>2018-10-22T08:37:43Z</updated> <title>#429 3x7/PomodoroTimer</title> <summary>a Pomodoro timer wire sculpture using the Boldport 3x7 display and an ATmega328</summary> <content type="html"><div><p>a Pomodoro timer wire sculpture using the Boldport 3x7 display and an ATmega328</p><img src="https://leap.tardate.com/boldportclub/3x7/pomodorotimer/assets/pomodorotimer_build.jpg" /></div></content> <category term="Boldport"/> <category term="LED 7-Segment"/> <category term="ATmel"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/3x7/lrthreedigitdemo/</id> <link href="https://leap.tardate.com/boldportclub/3x7/lrthreedigitdemo/"/> <g:image_link>https://leap.tardate.com/boldportclub/3x7/lrthreedigitdemo/assets/lrthreedigitdemo_build.jpg</g:image_link> <updated>2018-10-21T09:49:44Z</updated> <title>#428 3x7 LRThreeDigitDemo</title> <summary>driving the Boldport 3x7 display from a Cuttle (Arduino) and the LRThreeDigits library</summary> <content type="html"><div><p>driving the Boldport 3x7 display from a Cuttle (Arduino) and the LRThreeDigits library</p><img src="https://leap.tardate.com/boldportclub/3x7/lrthreedigitdemo/assets/lrthreedigitdemo_build.jpg" /></div></content> <category term="Boldport"/> <category term="LED 7-Segment"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/attiny/softwarepwm/</id> <link href="https://leap.tardate.com/playground/attiny/softwarepwm/"/> <g:image_link>https://leap.tardate.com/playground/attiny/softwarepwm/assets/softwarepwm_build.jpg</g:image_link> <updated>2020-02-17T17:45:56Z</updated> <title>#427 ATtiny Software PWM</title> <summary>generating arbitrary PWM signals with an ATtiny85 and bit-banging techniques</summary> <content type="html"><div><p>generating arbitrary PWM signals with an ATtiny85 and bit-banging techniques</p><img src="https://leap.tardate.com/playground/attiny/softwarepwm/assets/softwarepwm_build.jpg" /></div></content> <category term="AVR"/> <category term="PWM"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/3x7/rippletester/</id> <link href="https://leap.tardate.com/boldportclub/3x7/rippletester/"/> <g:image_link>https://leap.tardate.com/boldportclub/3x7/rippletester/assets/rippletester_build.jpg</g:image_link> <updated>2018-10-19T10:19:23Z</updated> <title>#426 3x7 RippleTester </title> <summary>using some 4000 series counters (CD4017, CD4060) to exercise the digits and segments of the Boldport 3x7</summary> <content type="html"><div><p>using some 4000 series counters (CD4017, CD4060) to exercise the digits and segments of the Boldport 3x7</p><img src="https://leap.tardate.com/boldportclub/3x7/rippletester/assets/rippletester_build.jpg" /></div></content> <category term="Boldport"/> <category term="LED 7-Segment"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/3x7/</id> <link href="https://leap.tardate.com/boldportclub/3x7/"/> <g:image_link>https://leap.tardate.com/boldportclub/3x7/assets/3x7_build.jpg</g:image_link> <updated>2018-10-14T07:41:50Z</updated> <title>#425 BoldportClub/3x7</title> <summary>building the Boldport 3x7, Project #29, with custom flip-top layout so you can see inside this discrete 3-digit, 7-segment display</summary> <content type="html"><div><p>building the Boldport 3x7, Project #29, with custom flip-top layout so you can see inside this discrete 3-digit, 7-segment display</p><img src="https://leap.tardate.com/boldportclub/3x7/assets/3x7_build.jpg" /></div></content> <category term="Boldport"/> <category term="LED 7-Segment"/> </entry> <entry> <id>https://leap.tardate.com/playground/vl53l0x/thetoneranger/</id> <link href="https://leap.tardate.com/playground/vl53l0x/thetoneranger/"/> <g:image_link>https://leap.tardate.com/playground/vl53l0x/thetoneranger/assets/thetoneranger_build.jpg</g:image_link> <updated>2018-10-11T23:43:54Z</updated> <title>#424 TheToneRanger</title> <summary>a simple modification of the basic VL53L0X example to add audio indication of range</summary> <content type="html"><div><p>a simple modification of the basic VL53L0X example to add audio indication of range</p><img src="https://leap.tardate.com/playground/vl53l0x/thetoneranger/assets/thetoneranger_build.jpg" /></div></content> <category term="Arduino"/> <category term="Sensors"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/playground/makeruno/</id> <link href="https://leap.tardate.com/playground/makeruno/"/> <g:image_link>https://leap.tardate.com/playground/makeruno/assets/makeruno_build.jpg</g:image_link> <updated>2018-10-11T17:28:40Z</updated> <title>#423 MakerUno</title> <summary>checking out the Maker UNO, a feature-packed Arduino-compatible board from Cytron in Penang, Malaysia</summary> <content type="html"><div><p>checking out the Maker UNO, a feature-packed Arduino-compatible board from Cytron in Penang, Malaysia</p><img src="https://leap.tardate.com/playground/makeruno/assets/makeruno_build.jpg" /></div></content> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/vl53l0x/lasertapemeasure/</id> <link href="https://leap.tardate.com/playground/vl53l0x/lasertapemeasure/"/> <g:image_link>https://leap.tardate.com/playground/vl53l0x/lasertapemeasure/assets/lasertapemeasure_build.jpg</g:image_link> <updated>2018-10-10T14:34:19Z</updated> <title>#422 LaserTapeMeasure</title> <summary>using a VL53L0X ranging sensor to make a short-range laser tape measure with an Arduino with Nokia 5110 display</summary> <content type="html"><div><p>using a VL53L0X ranging sensor to make a short-range laser tape measure with an Arduino with Nokia 5110 display</p><img src="https://leap.tardate.com/playground/vl53l0x/lasertapemeasure/assets/lasertapemeasure_build.jpg" /></div></content> <category term="Sensors"/> <category term="Arduino"/> <category term="LCD"/> </entry> <entry> <id>https://leap.tardate.com/radio/sdr/limesdr/firstlook/</id> <link href="https://leap.tardate.com/radio/sdr/limesdr/firstlook/"/> <g:image_link>https://leap.tardate.com/radio/sdr/limesdr/firstlook/assets/firstlook_build.jpg</g:image_link> <updated>2019-09-22T13:44:42Z</updated> <title>#421 LimeSDR First Look</title> <summary>unboxing and first test of the LimeSDR-USB software-defined radio with macOS host</summary> <content type="html"><div><p>unboxing and first test of the LimeSDR-USB software-defined radio with macOS host</p><img src="https://leap.tardate.com/radio/sdr/limesdr/firstlook/assets/firstlook_build.jpg" /></div></content> <category term="SDR"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/lite2sound-bc/cuttletalk/</id> <link href="https://leap.tardate.com/boldportclub/lite2sound-bc/cuttletalk/"/> <g:image_link>https://leap.tardate.com/boldportclub/lite2sound-bc/cuttletalk/assets/cuttletalk_build.jpg</g:image_link> <updated>2018-10-07T12:55:22Z</updated> <title>#420 CuttleTalk</title> <summary>playing audio from a Boldport Cuttle (Arduino) over LiFi with lite2sound</summary> <content type="html"><div><p>playing audio from a Boldport Cuttle (Arduino) over LiFi with lite2sound</p><img src="https://leap.tardate.com/boldportclub/lite2sound-bc/cuttletalk/assets/cuttletalk_build.jpg" /></div></content> <category term="Boldport"/> <category term="Audio"/> <category term="LiFi"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/lite2sound-bc/</id> <link href="https://leap.tardate.com/boldportclub/lite2sound-bc/"/> <g:image_link>https://leap.tardate.com/boldportclub/lite2sound-bc/assets/lite2sound-bc_build.jpg</g:image_link> <updated>2018-10-07T12:55:22Z</updated> <title>#419 BoldportClub/lite2sound-bc</title> <summary>building Lite2Sound Boldport Club Project #26</summary> <content type="html"><div><p>building Lite2Sound Boldport Club Project #26</p><img src="https://leap.tardate.com/boldportclub/lite2sound-bc/assets/lite2sound-bc_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/commonemitterhartley/</id> <link href="https://leap.tardate.com/electronics101/oscillators/commonemitterhartley/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/commonemitterhartley/assets/commonemitterhartley_build.jpg</g:image_link> <updated>2018-10-06T11:01:19Z</updated> <title>#418 CommonEmitterHartley</title> <summary>build and test a BJT common-emitter Hartley oscillator</summary> <content type="html"><div><p>build and test a BJT common-emitter Hartley oscillator</p><img src="https://leap.tardate.com/electronics101/oscillators/commonemitterhartley/assets/commonemitterhartley_build.jpg" /></div></content> <category term="BJT"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/playground/audio/simplesampleplayer/</id> <link href="https://leap.tardate.com/playground/audio/simplesampleplayer/"/> <g:image_link>https://leap.tardate.com/playground/audio/simplesampleplayer/assets/simplesampleplayer_build.jpg</g:image_link> <updated>2018-10-03T14:27:30Z</updated> <title>#417 SimpleSamplePlayer</title> <summary>playing short audio samples on an Arduino using some PWM tricks from the PCM library</summary> <content type="html"><div><p>playing short audio samples on an Arduino using some PWM tricks from the PCM library</p><img src="https://leap.tardate.com/playground/audio/simplesampleplayer/assets/simplesampleplayer_build.jpg" /></div></content> <category term="Audio"/> <category term="Arduino"/> <category term="PWM"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/linefollowerkit/</id> <link href="https://leap.tardate.com/kinetics/linefollowerkit/"/> <g:image_link>https://leap.tardate.com/kinetics/linefollowerkit/assets/linefollowerkit_build.jpg</g:image_link> <updated>2022-02-22T14:30:25Z</updated> <title>#416 Line Follower Kit</title> <summary>building the D2-5 Intelligent Line Tracking Car Kit - a nice demonstration of a simple feedback control system with an LM393 comparator</summary> <content type="html"><div><p>building the D2-5 Intelligent Line Tracking Car Kit - a nice demonstration of a simple feedback control system with an LM393 comparator</p><img src="https://leap.tardate.com/kinetics/linefollowerkit/assets/linefollowerkit_build.jpg" /></div></content> <category term="Sensors"/> <category term="Kinetics"/> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/nixiepowersupply/</id> <link href="https://leap.tardate.com/electronics101/555timer/nixiepowersupply/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/nixiepowersupply/assets/nixiepowersupply_build.jpg</g:image_link> <updated>2018-09-29T10:48:19Z</updated> <title>#415 Nixie Power Supply - 555 Timer Version</title> <summary>using a 555 boost converter to test some Nixie IN3 and IN14 tubes</summary> <content type="html"><div><p>using a 555 boost converter to test some Nixie IN3 and IN14 tubes</p><img src="https://leap.tardate.com/electronics101/555timer/nixiepowersupply/assets/nixiepowersupply_build.jpg" /></div></content> <category term="Power"/> <category term="Nixie"/> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/decadeprogrammableresistor/</id> <link href="https://leap.tardate.com/electronics101/decadeprogrammableresistor/"/> <g:image_link>https://leap.tardate.com/electronics101/decadeprogrammableresistor/assets/decadeprogrammableresistor_build.jpg</g:image_link> <updated>2018-09-16T13:22:57Z</updated> <title>#414 Decade Programmable Resistor</title> <summary>building an old-fashioned 7-digit decade programmable resistor with push-button control</summary> <content type="html"><div><p>building an old-fashioned 7-digit decade programmable resistor with push-button control</p><img src="https://leap.tardate.com/electronics101/decadeprogrammableresistor/assets/decadeprogrammableresistor_build.jpg" /></div></content> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/rotaryencoders/incrementaltester/</id> <link href="https://leap.tardate.com/electronics101/rotaryencoders/incrementaltester/"/> <g:image_link>https://leap.tardate.com/electronics101/rotaryencoders/incrementaltester/assets/incrementaltester_build.jpg</g:image_link> <updated>2018-08-30T17:21:53Z</updated> <title>#413 Rotary Encoder Tester</title> <summary>demonstrating a rotary encoder forward/reverse LED indicator using simple digital logic</summary> <content type="html"><div><p>demonstrating a rotary encoder forward/reverse LED indicator using simple digital logic</p><img src="https://leap.tardate.com/electronics101/rotaryencoders/incrementaltester/assets/incrementaltester_build.jpg" /></div></content> <category term="Sensors"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/bjt/comparator/</id> <link href="https://leap.tardate.com/electronics101/bjt/comparator/"/> <g:image_link>https://leap.tardate.com/electronics101/bjt/comparator/assets/comparator_build.jpg</g:image_link> <updated>2018-08-28T15:50:00Z</updated> <title>#412 BJT Comparator</title> <summary>investigating and testing a comparator design with discrete components</summary> <content type="html"><div><p>investigating and testing a comparator design with discrete components</p><img src="https://leap.tardate.com/electronics101/bjt/comparator/assets/comparator_build.jpg" /></div></content> <category term="BJT"/> <category term="Comparator"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/cordwood-three/</id> <link href="https://leap.tardate.com/boldportclub/cordwood-three/"/> <g:image_link>https://leap.tardate.com/boldportclub/cordwood-three/assets/cordwood-three_build.jpg</g:image_link> <updated>2018-08-16T17:04:31Z</updated> <title>#411 BoldportClub/cordwood-three</title> <summary>custom build of the Boldport Club Cordwood Puzzle III, Project #25, May 2018, with an archway layout and a spring-loaded LED trigger machanism</summary> <content type="html"><div><p>custom build of the Boldport Club Cordwood Puzzle III, Project #25, May 2018, with an archway layout and a spring-loaded LED trigger machanism</p><img src="https://leap.tardate.com/boldportclub/cordwood-three/assets/cordwood-three_build.jpg" /></div></content> <category term="Boldport"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/homopolarjoulethiefblinky/</id> <link href="https://leap.tardate.com/kinetics/homopolarjoulethiefblinky/"/> <g:image_link>https://leap.tardate.com/kinetics/homopolarjoulethiefblinky/assets/homopolarjoulethiefblinky_build.jpg</g:image_link> <updated>2018-08-12T15:52:33Z</updated> <title>#410 HomopolarJouleThiefBlinky</title> <summary>a totally Rube-Goldberg contraption for blinking an LED with a AAA battery, homopolar motor and joule thief mechanisms</summary> <content type="html"><div><p>a totally Rube-Goldberg contraption for blinking an LED with a AAA battery, homopolar motor and joule thief mechanisms</p><img src="https://leap.tardate.com/kinetics/homopolarjoulethiefblinky/assets/homopolarjoulethiefblinky_build.jpg" /></div></content> <category term="Kinetics"/> <category term="LED"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/conehead/</id> <link href="https://leap.tardate.com/boldportclub/conehead/"/> <g:image_link>https://leap.tardate.com/boldportclub/conehead/assets/conehead_build.jpg</g:image_link> <updated>2021-11-23T11:14:19Z</updated> <title>#409 Conehead</title> <summary>The Conehead is the fourth in the Boldport Club series of beautiful electronic critters, Project #24 April 2018. This one chirps in response to light.</summary> <content type="html"><div><p>The Conehead is the fourth in the Boldport Club series of beautiful electronic critters, Project #24 April 2018. This one chirps in response to light.</p><img src="https://leap.tardate.com/boldportclub/conehead/assets/conehead_build.jpg" /></div></content> <category term="Boldport"/> <category term="Oscillators"/> <category term="CMOS/TTL"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/bbbreakout/</id> <link href="https://leap.tardate.com/electronics101/power/bbbreakout/"/> <g:image_link>https://leap.tardate.com/electronics101/power/bbbreakout/assets/bbbreakout_build.jpg</g:image_link> <updated>2018-08-04T16:49:31Z</updated> <title>#408 BB Breakout</title> <summary>a little breadboard power adapter and breakout with 5.5x2.1mm barrel jack, terminal block and XH2.54 connectors</summary> <content type="html"><div><p>a little breadboard power adapter and breakout with 5.5x2.1mm barrel jack, terminal block and XH2.54 connectors</p><img src="https://leap.tardate.com/electronics101/power/bbbreakout/assets/bbbreakout_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/equipment/dps3005benchpowersupply/</id> <link href="https://leap.tardate.com/equipment/dps3005benchpowersupply/"/> <g:image_link>https://leap.tardate.com/equipment/dps3005benchpowersupply/assets/dps3005benchpowersupply_build.jpg</g:image_link> <updated>2018-09-18T12:38:41Z</updated> <title>#407 DPS3005 Bench Power Supply</title> <summary>building an AC-powered 32V/5A variable bench power supply based on the DPS3005 DC power supply module and rectified step-down transformer</summary> <content type="html"><div><p>building an AC-powered 32V/5A variable bench power supply based on the DPS3005 DC power supply module and rectified step-down transformer</p><img src="https://leap.tardate.com/equipment/dps3005benchpowersupply/assets/dps3005benchpowersupply_build.jpg" /></div></content> <category term="Power"/> <category term="Tools"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/serialinterface/usbuartch340g/</id> <link href="https://leap.tardate.com/electronics101/serialinterface/usbuartch340g/"/> <g:image_link>https://leap.tardate.com/electronics101/serialinterface/usbuartch340g/assets/usbuartch340g_build.jpg</g:image_link> <updated>2019-08-12T10:43:09Z</updated> <title>#406 Custom CH340G USB to UART interface</title> <summary>build a USB to TTL serial interface on a breadboard using the CH340G interface chip, and use it to program Arduino sketches on an ATmega328P</summary> <content type="html"><div><p>build a USB to TTL serial interface on a breadboard using the CH340G interface chip, and use it to program Arduino sketches on an ATmega328P</p><img src="https://leap.tardate.com/electronics101/serialinterface/usbuartch340g/assets/usbuartch340g_build.jpg" /></div></content> <category term="USB"/> <category term="Serial"/> <category term="CH340"/> </entry> <entry> <id>https://leap.tardate.com/playground/atmegaserialprogrammer/</id> <link href="https://leap.tardate.com/playground/atmegaserialprogrammer/"/> <g:image_link>https://leap.tardate.com/playground/atmegaserialprogrammer/assets/atmegaserialprogrammer_build.jpg</g:image_link> <updated>2018-07-22T16:39:25Z</updated> <title>#405 ATmegaSerialProgrammer</title> <summary>all about bootloaders and how to program an ATMEGA328P chip over a serial connection with a CH340G USB-Serial adapter instead of ICSP</summary> <content type="html"><div><p>all about bootloaders and how to program an ATMEGA328P chip over a serial connection with a CH340G USB-Serial adapter instead of ICSP</p><img src="https://leap.tardate.com/playground/atmegaserialprogrammer/assets/atmegaserialprogrammer_build.jpg" /></div></content> <category term="Arduino"/> <category term="ATmel"/> <category term="ICSP"/> <category term="UART"/> </entry> <entry> <id>https://leap.tardate.com/kraft/arzamatron/</id> <link href="https://leap.tardate.com/kraft/arzamatron/"/> <g:image_link>https://leap.tardate.com/kraft/arzamatron/assets/arzamatron_build.jpg</g:image_link> <updated>2019-04-22T12:07:30Z</updated> <title>#404 Arza-matron</title> <summary>whipping together a simple sound-activated party decoration with the other half of the Fretboard guitar some LED strips</summary> <content type="html"><div><p>whipping together a simple sound-activated party decoration with the other half of the Fretboard guitar some LED strips</p><img src="https://leap.tardate.com/kraft/arzamatron/assets/arzamatron_build.jpg" /></div></content> <category term="Arduino"/> <category term="LED"/> <category term="Sensors"/> <category term="Craft"/> </entry> <entry> <id>https://leap.tardate.com/equipment/gy560/</id> <link href="https://leap.tardate.com/equipment/gy560/"/> <g:image_link>https://leap.tardate.com/equipment/gy560/assets/gy560_build.jpg</g:image_link> <updated>2018-09-18T12:38:41Z</updated> <title>#403 GY560</title> <summary>checking out the GY560 Frequency Counter</summary> <content type="html"><div><p>checking out the GY560 Frequency Counter</p><img src="https://leap.tardate.com/equipment/gy560/assets/gy560_build.jpg" /></div></content> <category term="Radio"/> <category term="Tools"/> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/pips/</id> <link href="https://leap.tardate.com/boldportclub/pips/"/> <g:image_link>https://leap.tardate.com/boldportclub/pips/assets/pips_build.jpg</g:image_link> <updated>2018-07-07T04:46:12Z</updated> <title>#402 BoldportClub/pips</title> <summary>rolling the BoldportClub Pips (Project #23) - a classic Elektor die circuit using the CD4060 ripple counter</summary> <content type="html"><div><p>rolling the BoldportClub Pips (Project #23) - a classic Elektor die circuit using the CD4060 ripple counter</p><img src="https://leap.tardate.com/boldportclub/pips/assets/pips_build.jpg" /></div></content> <category term="Boldport"/> <category term="CD4060"/> </entry> <entry> <id>https://leap.tardate.com/radio/pixie/</id> <link href="https://leap.tardate.com/radio/pixie/"/> <g:image_link>https://leap.tardate.com/radio/pixie/assets/pixie_build.jpg</g:image_link> <updated>2018-07-08T04:38:55Z</updated> <title>#401 Pixie</title> <summary>research the history and variants of the Pixie QRP transceiver, and build a basic Pixie 4.3 kit on 40m</summary> <content type="html"><div><p>research the history and variants of the Pixie QRP transceiver, and build a basic Pixie 4.3 kit on 40m</p><img src="https://leap.tardate.com/radio/pixie/assets/pixie_build.jpg" /></div></content> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/equipment/usbprotector/</id> <link href="https://leap.tardate.com/equipment/usbprotector/"/> <g:image_link>https://leap.tardate.com/equipment/usbprotector/assets/usbprotector_build.jpg</g:image_link> <updated>2018-09-18T12:38:41Z</updated> <title>#400 USB Protector</title> <summary>building the Silicon Chip USB Protector which demonstrates various methods of reverse-polarity, over-voltage and over-current protection</summary> <content type="html"><div><p>building the Silicon Chip USB Protector which demonstrates various methods of reverse-polarity, over-voltage and over-current protection</p><img src="https://leap.tardate.com/equipment/usbprotector/assets/usbprotector_build.jpg" /></div></content> <category term="Power"/> <category term="USB"/> <category term="Tools"/> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/8051/at89c2051/ledchaser/</id> <link href="https://leap.tardate.com/8051/at89c2051/ledchaser/"/> <g:image_link>https://leap.tardate.com/8051/at89c2051/ledchaser/assets/ledchaser_build.jpg</g:image_link> <updated>2023-03-27T13:57:21Z</updated> <title>#399 AT89C2051 LED Chaser</title> <summary>run an LED chaser with an AT89C2051 using interrupts for timing; C source compiled with SDCC on MacOSX</summary> <content type="html"><div><p>run an LED chaser with an AT89C2051 using interrupts for timing; C source compiled with SDCC on MacOSX</p><img src="https://leap.tardate.com/8051/at89c2051/ledchaser/assets/ledchaser_build.jpg" /></div></content> <category term="8051"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/playground/lcd/i2cadapter/</id> <link href="https://leap.tardate.com/playground/lcd/i2cadapter/"/> <g:image_link>https://leap.tardate.com/playground/lcd/i2cadapter/assets/i2cadapter_build.jpg</g:image_link> <updated>2018-06-10T15:08:14Z</updated> <title>#398 LCD I2C Adapter</title> <summary>using an I²C adapter to reduce the Arduino pins needed to drive an LCD</summary> <content type="html"><div><p>using an I²C adapter to reduce the Arduino pins needed to drive an LCD</p><img src="https://leap.tardate.com/playground/lcd/i2cadapter/assets/i2cadapter_build.jpg" /></div></content> <category term="LCD"/> <category term="I2C"/> </entry> <entry> <id>https://leap.tardate.com/playground/i2cscanner/</id> <link href="https://leap.tardate.com/playground/i2cscanner/"/> <g:image_link>https://leap.tardate.com/playground/i2cscanner/assets/i2cscanner_build.jpg</g:image_link> <updated>2018-06-10T11:38:19Z</updated> <title>#397 I2CScanner</title> <summary>scanning for I²C devices with an Arduino</summary> <content type="html"><div><p>scanning for I²C devices with an Arduino</p><img src="https://leap.tardate.com/playground/i2cscanner/assets/i2cscanner_build.jpg" /></div></content> <category term="I2C"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/capacitivetouchorgan/</id> <link href="https://leap.tardate.com/playground/capacitivetouchorgan/"/> <g:image_link>https://leap.tardate.com/playground/capacitivetouchorgan/assets/capacitivetouchorgan_build.jpg</g:image_link> <updated>2018-06-09T15:33:51Z</updated> <title>#396 CapacitiveTouchOrgan</title> <summary>a simple chromatic scale organ, controlled with a Freescale/NXP MPR121 Proximity Capacitive Touch Sensor and an Arduino</summary> <content type="html"><div><p>a simple chromatic scale organ, controlled with a Freescale/NXP MPR121 Proximity Capacitive Touch Sensor and an Arduino</p><img src="https://leap.tardate.com/playground/capacitivetouchorgan/assets/capacitivetouchorgan_build.jpg" /></div></content> <category term="Audio"/> <category term="Sensors"/> <category term="MPR121"/> </entry> <entry> <id>https://leap.tardate.com/8051/at89c2051/blinky/</id> <link href="https://leap.tardate.com/8051/at89c2051/blinky/"/> <g:image_link>https://leap.tardate.com/8051/at89c2051/blinky/assets/blinky_build.jpg</g:image_link> <updated>2023-03-27T13:57:21Z</updated> <title>#395 AT89C2051 Blinky</title> <summary>Simplest LED blinky program in C for the AT89C2051(8051/MCS51) microprocessor, built with the SDCC open-source toolchain on MacOSX</summary> <content type="html"><div><p>Simplest LED blinky program in C for the AT89C2051(8051/MCS51) microprocessor, built with the SDCC open-source toolchain on MacOSX</p><img src="https://leap.tardate.com/8051/at89c2051/blinky/assets/blinky_build.jpg" /></div></content> <category term="8051"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/8051/at89c2051/programmer/</id> <link href="https://leap.tardate.com/8051/at89c2051/programmer/"/> <g:image_link>https://leap.tardate.com/8051/at89c2051/programmer/assets/programmer_build.jpg</g:image_link> <updated>2023-03-27T13:57:21Z</updated> <title>#394 AT89C2051 Programmer</title> <summary>building a programmer for the Intel MCS-51/8051 compatible AT89C2051, with host software running on MacOSX</summary> <content type="html"><div><p>building a programmer for the Intel MCS-51/8051 compatible AT89C2051, with host software running on MacOSX</p><img src="https://leap.tardate.com/8051/at89c2051/programmer/assets/programmer_build.jpg" /></div></content> <category term="8051"/> </entry> <entry> <id>https://leap.tardate.com/playground/dicksonchargepump/</id> <link href="https://leap.tardate.com/playground/dicksonchargepump/"/> <g:image_link>https://leap.tardate.com/playground/dicksonchargepump/assets/dicksonchargepump_build.jpg</g:image_link> <updated>2021-11-30T02:55:54Z</updated> <title>#393 Dickson Charge Pump</title> <summary>Zener-regulated 12V Dickson Charge Pump driven with Arduino PWM</summary> <content type="html"><div><p>Zener-regulated 12V Dickson Charge Pump driven with Arduino PWM</p><img src="https://leap.tardate.com/playground/dicksonchargepump/assets/dicksonchargepump_build.jpg" /></div></content> <category term="Arduino"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/whiteboard/</id> <link href="https://leap.tardate.com/boldportclub/whiteboard/"/> <g:image_link>https://leap.tardate.com/boldportclub/whiteboard/assets/whiteboard_build.jpg</g:image_link> <updated>2018-10-18T13:13:03Z</updated> <title>#392 BoldportClub/whiteboard</title> <summary>building the Whiteboard (Boldport Club project #22), a breadboard enhancer featuring variable and coin-cell power supplies and prototyping areas. Demonstrated with a 4-stage CD4060 ripple counter</summary> <content type="html"><div><p>building the Whiteboard (Boldport Club project #22), a breadboard enhancer featuring variable and coin-cell power supplies and prototyping areas. Demonstrated with a 4-stage CD4060 ripple counter</p><img src="https://leap.tardate.com/boldportclub/whiteboard/assets/whiteboard_build.jpg" /></div></content> <category term="Boldport"/> <category term="LM317"/> <category term="CD4060"/> </entry> <entry> <id>https://leap.tardate.com/equipment/millivoltmeterdiy/customboardandenclosure/</id> <link href="https://leap.tardate.com/equipment/millivoltmeterdiy/customboardandenclosure/"/> <g:image_link>https://leap.tardate.com/equipment/millivoltmeterdiy/customboardandenclosure/assets/customboardandenclosure_build.jpg</g:image_link> <updated>2018-09-18T12:38:41Z</updated> <title>#391 MilliVoltmeterDIY PCB and Enclosure</title> <summary>custom PCB and enclosure for the ATmega328-based millivolt meter based on a design by Scullcom Hobby Electronics. Uses an LTC2400 ADC and LT1019 voltage reference</summary> <content type="html"><div><p>custom PCB and enclosure for the ATmega328-based millivolt meter based on a design by Scullcom Hobby Electronics. Uses an LTC2400 ADC and LT1019 voltage reference</p><img src="https://leap.tardate.com/equipment/millivoltmeterdiy/customboardandenclosure/assets/customboardandenclosure_build.jpg" /></div></content> <category term="ATmega"/> <category term="ADC"/> <category term="Tools"/> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/pic/gettingblinky/usingc/</id> <link href="https://leap.tardate.com/pic/gettingblinky/usingc/"/> <g:image_link>https://leap.tardate.com/pic/gettingblinky/usingc/assets/usingc_build.jpg</g:image_link> <updated>2018-05-19T14:24:17Z</updated> <title>#390 PIC/GettingBlinky/UsingC</title> <summary>getting up and running building XC8 C projects on MacOSX and a PIC12F675. Let's get Blinky again!</summary> <content type="html"><div><p>getting up and running building XC8 C projects on MacOSX and a PIC12F675. Let's get Blinky again!</p><img src="https://leap.tardate.com/pic/gettingblinky/usingc/assets/usingc_build.jpg" /></div></content> <category term="PIC"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/bjt/twostagecommonemitteramplifier/</id> <link href="https://leap.tardate.com/electronics101/bjt/twostagecommonemitteramplifier/"/> <g:image_link>https://leap.tardate.com/electronics101/bjt/twostagecommonemitteramplifier/assets/twostagecommonemitteramplifier_build.jpg</g:image_link> <updated>2019-09-11T16:07:47Z</updated> <title>#389 Two-stage Common Emitter Amplifier</title> <summary>designing a two-stage common-emitter BJT amplifier</summary> <content type="html"><div><p>designing a two-stage common-emitter BJT amplifier</p><img src="https://leap.tardate.com/electronics101/bjt/twostagecommonemitteramplifier/assets/twostagecommonemitteramplifier_build.jpg" /></div></content> <category term="BJT"/> <category term="Amplifier"/> </entry> <entry> <id>https://leap.tardate.com/radio/singaporebands/</id> <link href="https://leap.tardate.com/radio/singaporebands/"/> <g:image_link>https://leap.tardate.com/radio/singaporebands/assets/singaporebands_build.jpg</g:image_link> <updated>2018-01-30T16:09:07Z</updated> <title>#388 SingaporeBands</title> <summary>notes on official band plans for Singapore and my and personal observations on where the activity is found</summary> <content type="html"><div><p>notes on official band plans for Singapore and my and personal observations on where the activity is found</p><img src="https://leap.tardate.com/radio/singaporebands/assets/singaporebands_build.jpg" /></div></content> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/playground/gpsbasics/</id> <link href="https://leap.tardate.com/playground/gpsbasics/"/> <g:image_link>https://leap.tardate.com/playground/gpsbasics/assets/gpsbasics_build.jpg</g:image_link> <updated>2018-05-04T02:30:15Z</updated> <title>#387 GpsBasics</title> <summary>using a NEMA-compatible GPS module for time and location with an Arduino</summary> <content type="html"><div><p>using a NEMA-compatible GPS module for time and location with an Arduino</p><img src="https://leap.tardate.com/playground/gpsbasics/assets/gpsbasics_build.jpg" /></div></content> <category term="GPS"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/arm/stm32f103c8t6/bluepill/</id> <link href="https://leap.tardate.com/arm/stm32f103c8t6/bluepill/"/> <g:image_link>https://leap.tardate.com/arm/stm32f103c8t6/bluepill/assets/bluepill_build.jpg</g:image_link> <updated>2020-05-24T09:47:27Z</updated> <title>#386 BluePill</title> <summary>programming an ARM Cortex-M3 STM32F103C8T6 Blue Pill board with the Arduino IDE</summary> <content type="html"><div><p>programming an ARM Cortex-M3 STM32F103C8T6 Blue Pill board with the Arduino IDE</p><img src="https://leap.tardate.com/arm/stm32f103c8t6/bluepill/assets/bluepill_build.jpg" /></div></content> <category term="STM32"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/widlar/</id> <link href="https://leap.tardate.com/boldportclub/widlar/"/> <g:image_link>https://leap.tardate.com/boldportclub/widlar/assets/widlar_build.jpg</g:image_link> <updated>2018-04-29T17:02:07Z</updated> <title>#385 BoldportClub/widlar</title> <summary>hacking the BoldportClub Widlar (Project #21) to get the classic μA723 to do something other than voltage regulation (LED blinky)</summary> <content type="html"><div><p>hacking the BoldportClub Widlar (Project #21) to get the classic μA723 to do something other than voltage regulation (LED blinky)</p><img src="https://leap.tardate.com/boldportclub/widlar/assets/widlar_build.jpg" /></div></content> <category term="LM723"/> <category term="Power"/> <category term="Oscillator"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/lm723/highvoltageregulator/</id> <link href="https://leap.tardate.com/electronics101/lm723/highvoltageregulator/"/> <g:image_link>https://leap.tardate.com/electronics101/lm723/highvoltageregulator/assets/highvoltageregulator_build.jpg</g:image_link> <updated>2018-04-29T08:37:04Z</updated> <title>#384 LM723 High-Voltage Regulator</title> <summary>playing with the basic high voltage output circuit for the LM723 voltage regulator</summary> <content type="html"><div><p>playing with the basic high voltage output circuit for the LM723 voltage regulator</p><img src="https://leap.tardate.com/electronics101/lm723/highvoltageregulator/assets/highvoltageregulator_build.jpg" /></div></content> <category term="Power"/> <category term="Regulator"/> <category term="LM723"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/lm723/lowvoltageregulator/</id> <link href="https://leap.tardate.com/electronics101/lm723/lowvoltageregulator/"/> <g:image_link>https://leap.tardate.com/electronics101/lm723/lowvoltageregulator/assets/lowvoltageregulator_build.jpg</g:image_link> <updated>2018-04-28T10:24:07Z</updated> <title>#383 LM723 Low-Voltage Regulator</title> <summary>playing with the basic low voltage output circuit for the LM723 voltage regulator</summary> <content type="html"><div><p>playing with the basic low voltage output circuit for the LM723 voltage regulator</p><img src="https://leap.tardate.com/electronics101/lm723/lowvoltageregulator/assets/lowvoltageregulator_build.jpg" /></div></content> <category term="Power"/> <category term="Regulator"/> <category term="LM723"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd4046/vco/</id> <link href="https://leap.tardate.com/electronics101/cd4046/vco/"/> <g:image_link>https://leap.tardate.com/electronics101/cd4046/vco/assets/vco_build.jpg</g:image_link> <updated>2018-04-25T02:41:52Z</updated> <title>#382 CD4046 VCO</title> <summary>audio range voltage-controlled oscillator using the CD4046 PLL/VCO IC</summary> <content type="html"><div><p>audio range voltage-controlled oscillator using the CD4046 PLL/VCO IC</p><img src="https://leap.tardate.com/electronics101/cd4046/vco/assets/vco_build.jpg" /></div></content> <category term="Oscillators"/> <category term="CMOS/TTL"/> <category term="CD4046"/> </entry> <entry> <id>https://leap.tardate.com/playground/waterqualitymonitor/</id> <link href="https://leap.tardate.com/playground/waterqualitymonitor/"/> <g:image_link>https://leap.tardate.com/playground/waterqualitymonitor/assets/waterqualitymonitor_build.jpg</g:image_link> <updated>2018-04-15T02:50:44Z</updated> <title>#381 WaterQualityMonitor</title> <summary>a project by oweibo to monitor water quality</summary> <content type="html"><div><p>a project by oweibo to monitor water quality</p><img src="https://leap.tardate.com/playground/waterqualitymonitor/assets/waterqualitymonitor_build.jpg" /></div></content> <category term="Arduino"/> <category term="Sensors"/> </entry> <entry> <id>https://leap.tardate.com/playground/tin_counter/</id> <link href="https://leap.tardate.com/playground/tin_counter/"/> <g:image_link>https://leap.tardate.com/playground/tin_counter/assets/tin_counter_build.jpg</g:image_link> <updated>2018-04-15T01:28:17Z</updated> <title>#380 Tin Counter</title> <summary>a project by novaprimexex to count tins as they roll by and detect tins without paper labels</summary> <content type="html"><div><p>a project by novaprimexex to count tins as they roll by and detect tins without paper labels</p><img src="https://leap.tardate.com/playground/tin_counter/assets/tin_counter_build.jpg" /></div></content> <category term="Arduino"/> <category term="Sensors"/> <category term="HC-SR04"/> </entry> <entry> <id>https://leap.tardate.com/playground/as3935/</id> <link href="https://leap.tardate.com/playground/as3935/"/> <g:image_link>https://leap.tardate.com/playground/as3935/assets/as3935_build.jpg</g:image_link> <updated>2018-02-19T02:10:32Z</updated> <title>#379 AS3935</title> <summary>using the AMS AS3935 Franklin Lightning Sensor with an Arduino with the Wire library</summary> <content type="html"><div><p>using the AMS AS3935 Franklin Lightning Sensor with an Arduino with the Wire library</p><img src="https://leap.tardate.com/playground/as3935/assets/as3935_build.jpg" /></div></content> <category term="Arduino"/> <category term="AS3935"/> <category term="Sensors"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/bjt/phasesplitter/</id> <link href="https://leap.tardate.com/electronics101/bjt/phasesplitter/"/> <g:image_link>https://leap.tardate.com/electronics101/bjt/phasesplitter/assets/phasesplitter_build.jpg</g:image_link> <updated>2018-02-11T14:25:33Z</updated> <title>#378 BJT Phase Splitter</title> <summary>simple unity-gain phase splitter in a little breadboard-compatible package</summary> <content type="html"><div><p>simple unity-gain phase splitter in a little breadboard-compatible package</p><img src="https://leap.tardate.com/electronics101/bjt/phasesplitter/assets/phasesplitter_build.jpg" /></div></content> <category term="BJT"/> </entry> <entry> <id>https://leap.tardate.com/playground/lcd5110/diyshield/</id> <link href="https://leap.tardate.com/playground/lcd5110/diyshield/"/> <g:image_link>https://leap.tardate.com/playground/lcd5110/diyshield/assets/diyshield_build.jpg</g:image_link> <updated>2018-02-08T16:06:26Z</updated> <title>#377 Nokia 5110 Shield</title> <summary>putting a Nokia 5110 on an Arduino Uno shield for no-fuss prototyping</summary> <content type="html"><div><p>putting a Nokia 5110 on an Arduino Uno shield for no-fuss prototyping</p><img src="https://leap.tardate.com/playground/lcd5110/diyshield/assets/diyshield_build.jpg" /></div></content> <category term="LCD"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/piezovibrationdetector/</id> <link href="https://leap.tardate.com/playground/piezovibrationdetector/"/> <g:image_link>https://leap.tardate.com/playground/piezovibrationdetector/assets/piezovibrationdetector_build.jpg</g:image_link> <updated>2018-01-28T15:41:42Z</updated> <title>#376 PiezoVibrationDetector</title> <summary>counting beats per minute with a piezo tap sensor and an Arduino/ATmega328 analog comparator</summary> <content type="html"><div><p>counting beats per minute with a piezo tap sensor and an Arduino/ATmega328 analog comparator</p><img src="https://leap.tardate.com/playground/piezovibrationdetector/assets/piezovibrationdetector_build.jpg" /></div></content> <category term="Arduino"/> <category term="Piezo"/> </entry> <entry> <id>https://leap.tardate.com/radio/threetransistorshortwavereceiver/</id> <link href="https://leap.tardate.com/radio/threetransistorshortwavereceiver/"/> <g:image_link>https://leap.tardate.com/radio/threetransistorshortwavereceiver/assets/threetransistorshortwavereceiver_build.jpg</g:image_link> <updated>2023-05-05T13:38:46Z</updated> <title>#375 Three Transistor Shortwave Receiver</title> <summary>building a simple 3-transistor regenerative receiver for HF shortwave</summary> <content type="html"><div><p>building a simple 3-transistor regenerative receiver for HF shortwave</p><img src="https://leap.tardate.com/radio/threetransistorshortwavereceiver/assets/threetransistorshortwavereceiver_build.jpg" /></div></content> <category term="Radio"/> <category term="HF"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/voltagereference/lt1019/</id> <link href="https://leap.tardate.com/electronics101/voltagereference/lt1019/"/> <g:image_link>https://leap.tardate.com/electronics101/voltagereference/lt1019/assets/lt1019_build.jpg</g:image_link> <updated>2018-01-24T13:49:12Z</updated> <title>#374 LT1019 Precision Reference</title> <summary>exploring the LT1019 precision reference, tested with an Arduino as an external voltage reference</summary> <content type="html"><div><p>exploring the LT1019 precision reference, tested with an Arduino as an external voltage reference</p><img src="https://leap.tardate.com/electronics101/voltagereference/lt1019/assets/lt1019_build.jpg" /></div></content> <category term="Voltage Reference"/> <category term="LT1019"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioeffectschips/px835/</id> <link href="https://leap.tardate.com/audio/audioeffectschips/px835/"/> <g:image_link>https://leap.tardate.com/audio/audioeffectschips/px835/assets/px835_build.jpg</g:image_link> <updated>2019-09-25T15:49:49Z</updated> <title>#373 PX835 Audio Effects Chip</title> <summary>figuring out how to use the PX835 "16 Kind of Sound Doorbell Chip" music chip</summary> <content type="html"><div><p>figuring out how to use the PX835 "16 Kind of Sound Doorbell Chip" music chip</p><img src="https://leap.tardate.com/audio/audioeffectschips/px835/assets/px835_build.jpg" /></div></content> <category term="Audio"/> <category term="Music Chips"/> </entry> <entry> <id>https://leap.tardate.com/equipment/millivoltmeterdiy/</id> <link href="https://leap.tardate.com/equipment/millivoltmeterdiy/"/> <g:image_link>https://leap.tardate.com/equipment/millivoltmeterdiy/assets/millivoltmeterdiy_build.jpg</g:image_link> <updated>2018-09-18T12:38:41Z</updated> <title>#372 MilliVoltmeter DIY</title> <summary>an ATmega328-based millivolt meter based on a design by Scullcom Hobby Electronics. Uses an LTC2400 ADC and LT1019 voltage reference</summary> <content type="html"><div><p>an ATmega328-based millivolt meter based on a design by Scullcom Hobby Electronics. Uses an LTC2400 ADC and LT1019 voltage reference</p><img src="https://leap.tardate.com/equipment/millivoltmeterdiy/assets/millivoltmeterdiy_build.jpg" /></div></content> <category term="ATmega"/> <category term="ADC"/> <category term="Tools"/> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/bjt/commonemitteramplifier/</id> <link href="https://leap.tardate.com/electronics101/bjt/commonemitteramplifier/"/> <g:image_link>https://leap.tardate.com/electronics101/bjt/commonemitteramplifier/assets/commonemitteramplifier_build.jpg</g:image_link> <updated>2018-01-09T14:26:33Z</updated> <title>#371 BJT Common-Emitter Amplifier</title> <summary>all about BJT common-emitter amplifier biasing and class of operation</summary> <content type="html"><div><p>all about BJT common-emitter amplifier biasing and class of operation</p><img src="https://leap.tardate.com/electronics101/bjt/commonemitteramplifier/assets/commonemitteramplifier_build.jpg" /></div></content> <category term="BJT"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitaswitch/ts3a5018/</id> <link href="https://leap.tardate.com/electronics101/digitaswitch/ts3a5018/"/> <g:image_link>https://leap.tardate.com/electronics101/digitaswitch/ts3a5018/assets/ts3a5018_build.jpg</g:image_link> <updated>2018-01-08T18:17:48Z</updated> <title>#370 DigitaSwitch/TS3A5018</title> <summary>testing the TS3A5018 Quad SPDT Analog Switch with a simple 555 timer and Arduino demo</summary> <content type="html"><div><p>testing the TS3A5018 Quad SPDT Analog Switch with a simple 555 timer and Arduino demo</p><img src="https://leap.tardate.com/electronics101/digitaswitch/ts3a5018/assets/ts3a5018_build.jpg" /></div></content> <category term="Arduino"/> <category term="Digital Switch"/> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/ananas/</id> <link href="https://leap.tardate.com/boldportclub/ananas/"/> <g:image_link>https://leap.tardate.com/boldportclub/ananas/assets/ananas_build.jpg</g:image_link> <updated>2021-11-23T11:14:19Z</updated> <title>#369 Ananas</title> <summary>building the tropical end-of-year present from Boldport Club, Project #20 - ananas!</summary> <content type="html"><div><p>building the tropical end-of-year present from Boldport Club, Project #20 - ananas!</p><img src="https://leap.tardate.com/boldportclub/ananas/assets/ananas_build.jpg" /></div></content> <category term="Boldport"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/audio/granularsynth/</id> <link href="https://leap.tardate.com/audio/granularsynth/"/> <g:image_link>https://leap.tardate.com/audio/granularsynth/assets/granularsynth_build.jpg</g:image_link> <updated>2019-06-01T03:29:58Z</updated> <title>#368 GranularSynth</title> <summary>building an ATmega328 granular synth module in an Altoids can .. because granular synthesis is a basically how they make Altoids, right?</summary> <content type="html"><div><p>building an ATmega328 granular synth module in an Altoids can .. because granular synthesis is a basically how they make Altoids, right?</p><img src="https://leap.tardate.com/audio/granularsynth/assets/granularsynth_build.jpg" /></div></content> <category term="Audio"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/nrf24/scanner/</id> <link href="https://leap.tardate.com/playground/nrf24/scanner/"/> <g:image_link>https://leap.tardate.com/playground/nrf24/scanner/assets/scanner_build.jpg</g:image_link> <updated>2017-12-31T10:23:33Z</updated> <title>#367 nRF24/Scanner</title> <summary>a 2.4GHz channel scanner for the nRF24l01+ with Nokia 5110 LCD display</summary> <content type="html"><div><p>a 2.4GHz channel scanner for the nRF24l01+ with Nokia 5110 LCD display</p><img src="https://leap.tardate.com/playground/nrf24/scanner/assets/scanner_build.jpg" /></div></content> <category term="nRF24"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/lcd5110/adafruitsoftwarespi/</id> <link href="https://leap.tardate.com/playground/lcd5110/adafruitsoftwarespi/"/> <g:image_link>https://leap.tardate.com/playground/lcd5110/adafruitsoftwarespi/assets/adafruitsoftwarespi_build.jpg</g:image_link> <updated>2017-12-31T07:59:31Z</updated> <title>#366 Lcd5110/AdafruitSoftwareSPI</title> <summary>a quick Nokia 5110 LCD test using software SPI and the Adafruit PCD8544 library</summary> <content type="html"><div><p>a quick Nokia 5110 LCD test using software SPI and the Adafruit PCD8544 library</p><img src="https://leap.tardate.com/playground/lcd5110/adafruitsoftwarespi/assets/adafruitsoftwarespi_build.jpg" /></div></content> <category term="LCD"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/lcd5110/adafruithardwarespi/</id> <link href="https://leap.tardate.com/playground/lcd5110/adafruithardwarespi/"/> <g:image_link>https://leap.tardate.com/playground/lcd5110/adafruithardwarespi/assets/adafruithardwarespi_build.jpg</g:image_link> <updated>2017-12-31T07:42:55Z</updated> <title>#365 Lcd5110/AdafruitHardwareSPI</title> <summary>a quick Nokia 5110 LCD test using hardware SPI and the Adafruit PCD8544 library</summary> <content type="html"><div><p>a quick Nokia 5110 LCD test using hardware SPI and the Adafruit PCD8544 library</p><img src="https://leap.tardate.com/playground/lcd5110/adafruithardwarespi/assets/adafruithardwarespi_build.jpg" /></div></content> <category term="LCD"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/classicnokia/</id> <link href="https://leap.tardate.com/playground/classicnokia/"/> <g:image_link>https://leap.tardate.com/playground/classicnokia/assets/classicnokia_build.jpg</g:image_link> <updated>2017-12-30T15:00:33Z</updated> <title>#364 ClassicNokia</title> <summary>just a quick transcription of the classic Nokia 3310 ringtone for Arduino</summary> <content type="html"><div><p>just a quick transcription of the classic Nokia 3310 ringtone for Arduino</p><img src="https://leap.tardate.com/playground/classicnokia/assets/classicnokia_build.jpg" /></div></content> <category term="Audio"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/binco/</id> <link href="https://leap.tardate.com/boldportclub/binco/"/> <g:image_link>https://leap.tardate.com/boldportclub/binco/assets/binco_build.jpg</g:image_link> <updated>2021-11-23T11:14:19Z</updated> <title>#363 BINCO</title> <summary>BINCO is a little up or down "fidget" counter, Project #19 of the Boldport Club</summary> <content type="html"><div><p>BINCO is a little up or down "fidget" counter, Project #19 of the Boldport Club</p><img src="https://leap.tardate.com/boldportclub/binco/assets/binco_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="LED"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioeffectschips/h83a/</id> <link href="https://leap.tardate.com/audio/audioeffectschips/h83a/"/> <g:image_link>https://leap.tardate.com/audio/audioeffectschips/h83a/assets/h83a_build.jpg</g:image_link> <updated>2019-09-25T15:49:49Z</updated> <title>#362 H83A Audio Effects Chip</title> <summary>figuring out how to use the H-83A "12 songs" music chip</summary> <content type="html"><div><p>figuring out how to use the H-83A "12 songs" music chip</p><img src="https://leap.tardate.com/audio/audioeffectschips/h83a/assets/h83a_build.jpg" /></div></content> <category term="Audio"/> <category term="Music Chips"/> </entry> <entry> <id>https://leap.tardate.com/playground/tft/color128x128/</id> <link href="https://leap.tardate.com/playground/tft/color128x128/"/> <g:image_link>https://leap.tardate.com/playground/tft/color128x128/assets/color128x128_build.jpg</g:image_link> <updated>2017-12-24T15:49:12Z</updated> <title>#361 TFT/Color128x128</title> <summary>testing a 128x128 colour TFT LCD with a couple of different Arduino libraries</summary> <content type="html"><div><p>testing a 128x128 colour TFT LCD with a couple of different Arduino libraries</p><img src="https://leap.tardate.com/playground/tft/color128x128/assets/color128x128_build.jpg" /></div></content> <category term="TFT LCD"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/voltagereference/tl431/shuntregulator/</id> <link href="https://leap.tardate.com/electronics101/voltagereference/tl431/shuntregulator/"/> <g:image_link>https://leap.tardate.com/electronics101/voltagereference/tl431/shuntregulator/assets/shuntregulator_build.jpg</g:image_link> <updated>2018-01-24T13:49:35Z</updated> <title>#360 TL431 Shunt Regulator</title> <summary>testing a TL431 voltage reference (regulator) circuit with manual course and fine trim</summary> <content type="html"><div><p>testing a TL431 voltage reference (regulator) circuit with manual course and fine trim</p><img src="https://leap.tardate.com/electronics101/voltagereference/tl431/shuntregulator/assets/shuntregulator_build.jpg" /></div></content> <category term="Power"/> <category term="Regulator"/> <category term="Voltage Reference"/> <category term="TL431"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioeffectschips/hs088/</id> <link href="https://leap.tardate.com/audio/audioeffectschips/hs088/"/> <g:image_link>https://leap.tardate.com/audio/audioeffectschips/hs088/assets/hs088_build.jpg</g:image_link> <updated>2019-09-25T15:49:49Z</updated> <title>#359 HS088 Audio Effects Chip</title> <summary>figuring out the HS088 "Ding Dong" audio effects chip</summary> <content type="html"><div><p>figuring out the HS088 "Ding Dong" audio effects chip</p><img src="https://leap.tardate.com/audio/audioeffectschips/hs088/assets/hs088_build.jpg" /></div></content> <category term="Audio"/> <category term="Music Chips"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mc34063/modulekit/</id> <link href="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mc34063/modulekit/"/> <g:image_link>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mc34063/modulekit/assets/modulekit_build.jpg</g:image_link> <updated>2022-11-07T15:38:54Z</updated> <title>#358 MC34063 Boost Converter Kit</title> <summary>build and test an MC34063-based boost converter</summary> <content type="html"><div><p>build and test an MC34063-based boost converter</p><img src="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mc34063/modulekit/assets/modulekit_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/themonarch/</id> <link href="https://leap.tardate.com/boldportclub/themonarch/"/> <g:image_link>https://leap.tardate.com/boldportclub/themonarch/assets/themonarch_build.jpg</g:image_link> <updated>2017-12-18T15:35:20Z</updated> <title>#357 BoldportClub/TheMonarch</title> <summary>the third in a series of beautiful electronic "bug" boards from the Boldport Club, Project #18 October 2017</summary> <content type="html"><div><p>the third in a series of beautiful electronic "bug" boards from the Boldport Club, Project #18 October 2017</p><img src="https://leap.tardate.com/boldportclub/themonarch/assets/themonarch_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="Bugs"/> <category term="LFSR"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioeffectschips/px088a/</id> <link href="https://leap.tardate.com/audio/audioeffectschips/px088a/"/> <g:image_link>https://leap.tardate.com/audio/audioeffectschips/px088a/assets/px088a_build.jpg</g:image_link> <updated>2019-09-25T15:49:49Z</updated> <title>#356 PX088A Audio Effects Chip</title> <summary>figuring out how to use the PX088A "Für Elise" music chip</summary> <content type="html"><div><p>figuring out how to use the PX088A "Für Elise" music chip</p><img src="https://leap.tardate.com/audio/audioeffectschips/px088a/assets/px088a_build.jpg" /></div></content> <category term="Audio"/> <category term="Music Chips"/> </entry> <entry> <id>https://leap.tardate.com/kraft/snowflake/</id> <link href="https://leap.tardate.com/kraft/snowflake/"/> <g:image_link>https://leap.tardate.com/kraft/snowflake/assets/snowflake_build.jpg</g:image_link> <updated>2019-04-22T12:07:30Z</updated> <title>#355 Snow Flake</title> <summary>an Atmel SAM D ARM Cortex-M0-controlled LED ornament produced by @LuckResistor and shared with the Boldport Club community as a special project</summary> <content type="html"><div><p>an Atmel SAM D ARM Cortex-M0-controlled LED ornament produced by @LuckResistor and shared with the Boldport Club community as a special project</p><img src="https://leap.tardate.com/kraft/snowflake/assets/snowflake_build.jpg" /></div></content> <category term="Craft"/> <category term="ARM"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/spiderbot/</id> <link href="https://leap.tardate.com/kinetics/spiderbot/"/> <g:image_link>https://leap.tardate.com/kinetics/spiderbot/assets/spiderbot_build.jpg</g:image_link> <updated>2016-03-20T13:17:48Z</updated> <title>#354 SpiderBot</title> <summary>Boldport Club PissOff mutant offspring .. with spider legs and scuttling drive system</summary> <content type="html"><div><p>Boldport Club PissOff mutant offspring .. with spider legs and scuttling drive system</p><img src="https://leap.tardate.com/kinetics/spiderbot/assets/spiderbot_build.jpg" /></div></content> <category term="Boldport"/> <category term="Kinetics"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitallogic/dflipflop/</id> <link href="https://leap.tardate.com/electronics101/digitallogic/dflipflop/"/> <g:image_link>https://leap.tardate.com/electronics101/digitallogic/dflipflop/assets/dflipflop_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#353 D Flip-Flop</title> <summary>building a clocked D Flip-flop with 74LS00 NAND gates</summary> <content type="html"><div><p>building a clocked D Flip-flop with 74LS00 NAND gates</p><img src="https://leap.tardate.com/electronics101/digitallogic/dflipflop/assets/dflipflop_build.jpg" /></div></content> <category term="Digital Logic"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/radio/sdr/decodingacars/</id> <link href="https://leap.tardate.com/radio/sdr/decodingacars/"/> <g:image_link>https://leap.tardate.com/radio/sdr/decodingacars/assets/decodingacars_build.jpg</g:image_link> <updated>2019-09-22T13:44:42Z</updated> <title>#352 Decoding ACARS</title> <summary>decoding ACARS with rtl_acars_ng and a R820T2+RTL2832U dongle on macOS</summary> <content type="html"><div><p>decoding ACARS with rtl_acars_ng and a R820T2+RTL2832U dongle on macOS</p><img src="https://leap.tardate.com/radio/sdr/decodingacars/assets/decodingacars_build.jpg" /></div></content> <category term="SDR"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/radio/sdr/rtlsdrdongle/</id> <link href="https://leap.tardate.com/radio/sdr/rtlsdrdongle/"/> <g:image_link>https://leap.tardate.com/radio/sdr/rtlsdrdongle/assets/rtlsdrdongle_build.jpg</g:image_link> <updated>2019-09-22T13:44:42Z</updated> <title>#351 RTL-SDR Dongle</title> <summary>getting started with an R820T2+RTL2832U dongle and open-source SDR software on macOS (Gqrx, CubicSDR)</summary> <content type="html"><div><p>getting started with an R820T2+RTL2832U dongle and open-source SDR software on macOS (Gqrx, CubicSDR)</p><img src="https://leap.tardate.com/radio/sdr/rtlsdrdongle/assets/rtlsdrdongle_build.jpg" /></div></content> <category term="SDR"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/kraft/circuitscribe/litewings/</id> <link href="https://leap.tardate.com/kraft/circuitscribe/litewings/"/> <g:image_link>https://leap.tardate.com/kraft/circuitscribe/litewings/assets/litewings_build.jpg</g:image_link> <updated>2019-04-22T12:07:30Z</updated> <title>#350 LiteWings</title> <summary>learning about conductive ink with the CircuitScribe LiteWings kit</summary> <content type="html"><div><p>learning about conductive ink with the CircuitScribe LiteWings kit</p><img src="https://leap.tardate.com/kraft/circuitscribe/litewings/assets/litewings_build.jpg" /></div></content> <category term="Conductive Ink"/> <category term="Craft"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/stringy/demoburner/</id> <link href="https://leap.tardate.com/boldportclub/stringy/demoburner/"/> <g:image_link>https://leap.tardate.com/boldportclub/stringy/demoburner/assets/demoburner_build.jpg</g:image_link> <updated>2017-10-16T16:51:30Z</updated> <title>#349 stringy/DemoBurner</title> <summary>burning a new demo mode for the Boldport Club Stringy, with a Ruby gem for MusicXML conversion to PIC assembler</summary> <content type="html"><div><p>burning a new demo mode for the Boldport Club Stringy, with a Ruby gem for MusicXML conversion to PIC assembler</p><img src="https://leap.tardate.com/boldportclub/stringy/demoburner/assets/demoburner_build.jpg" /></div></content> <category term="Boldport"/> <category term="PIC"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitallogic/dlatch/</id> <link href="https://leap.tardate.com/electronics101/digitallogic/dlatch/"/> <g:image_link>https://leap.tardate.com/electronics101/digitallogic/dlatch/assets/dlatch_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#348 D Latch</title> <summary>building a D Latch with 74LS00 NAND gates</summary> <content type="html"><div><p>building a D Latch with 74LS00 NAND gates</p><img src="https://leap.tardate.com/electronics101/digitallogic/dlatch/assets/dlatch_build.jpg" /></div></content> <category term="Digital Logic"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/connectors/rf/</id> <link href="https://leap.tardate.com/electronics101/connectors/rf/"/> <g:image_link>https://leap.tardate.com/electronics101/connectors/rf/assets/rf_build.jpg</g:image_link> <updated>2018-07-08T04:38:55Z</updated> <title>#347 RF Connectors</title> <summary>notes on miscellaneous RF connectors</summary> <content type="html"><div><p>notes on miscellaneous RF connectors</p><img src="https://leap.tardate.com/electronics101/connectors/rf/assets/rf_build.jpg" /></div></content> <category term="Radio"/> <category term="Connectors"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitallogic/srlatchwithnandgates/</id> <link href="https://leap.tardate.com/electronics101/digitallogic/srlatchwithnandgates/"/> <g:image_link>https://leap.tardate.com/electronics101/digitallogic/srlatchwithnandgates/assets/srlatchwithnandgates_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#346 NAND Gate SR Latch</title> <summary>Set-Reset latch implemented with NAND gates</summary> <content type="html"><div><p>Set-Reset latch implemented with NAND gates</p><img src="https://leap.tardate.com/electronics101/digitallogic/srlatchwithnandgates/assets/srlatchwithnandgates_build.jpg" /></div></content> <category term="Digital Logic"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/mostap/</id> <link href="https://leap.tardate.com/boldportclub/mostap/"/> <g:image_link>https://leap.tardate.com/boldportclub/mostap/assets/mostap_build.jpg</g:image_link> <updated>2017-10-03T14:05:19Z</updated> <title>#345 BoldportClub/mostap</title> <summary>upgrading the tap to modern CMOS and MOSFET technology, circa 1975 - another Boldport Club retro classic. The mostap is a touch sensor using NAND-gate flip-flops and FET output drivers.</summary> <content type="html"><div><p>upgrading the tap to modern CMOS and MOSFET technology, circa 1975 - another Boldport Club retro classic. The mostap is a touch sensor using NAND-gate flip-flops and FET output drivers.</p><img src="https://leap.tardate.com/boldportclub/mostap/assets/mostap_build.jpg" /></div></content> <category term="Boldport"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/esp8266/micropython/gettingstarted/</id> <link href="https://leap.tardate.com/esp8266/micropython/gettingstarted/"/> <g:image_link>https://leap.tardate.com/esp8266/micropython/gettingstarted/assets/gettingstarted_build.jpg</g:image_link> <updated>2016-03-07T01:44:30Z</updated> <title>#344 ESP8266 GettingStarted with MicroPython</title> <summary>getting MicroPython up and running with an ESP-01 ESP8266</summary> <content type="html"><div><p>getting MicroPython up and running with an ESP-01 ESP8266</p><img src="https://leap.tardate.com/esp8266/micropython/gettingstarted/assets/gettingstarted_build.jpg" /></div></content> <category term="ESP8266"/> <category term="MicroPython"/> </entry> <entry> <id>https://leap.tardate.com/esp8266/sensors/dht11/</id> <link href="https://leap.tardate.com/esp8266/sensors/dht11/"/> <g:image_link>https://leap.tardate.com/esp8266/sensors/dht11/assets/dht11_build.jpg</g:image_link> <updated>2016-03-07T01:44:30Z</updated> <title>#343 ESP8266/Sensors/DHT11</title> <summary>reading temperature and humidity with a DHT11 sensor and ESP-01, coding with ESP8266 core for Arduino</summary> <content type="html"><div><p>reading temperature and humidity with a DHT11 sensor and ESP-01, coding with ESP8266 core for Arduino</p><img src="https://leap.tardate.com/esp8266/sensors/dht11/assets/dht11_build.jpg" /></div></content> <category term="ESP8266"/> <category term="Sensors"/> </entry> <entry> <id>https://leap.tardate.com/esp8266/morseblinky/</id> <link href="https://leap.tardate.com/esp8266/morseblinky/"/> <g:image_link>https://leap.tardate.com/esp8266/morseblinky/assets/morseblinky_build.jpg</g:image_link> <updated>2017-09-21T02:02:10Z</updated> <title>#342 ESP8266 Morse Blinky</title> <summary>building code for an ESP-01 with the ESP8266 core for Arduino and demonstrate with a simple morse code blinker</summary> <content type="html"><div><p>building code for an ESP-01 with the ESP8266 core for Arduino and demonstrate with a simple morse code blinker</p><img src="https://leap.tardate.com/esp8266/morseblinky/assets/morseblinky_build.jpg" /></div></content> <category term="ESP8266"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/usbpowersupplykit/</id> <link href="https://leap.tardate.com/electronics101/power/usbpowersupplykit/"/> <g:image_link>https://leap.tardate.com/electronics101/power/usbpowersupplykit/assets/usbpowersupplykit_build.jpg</g:image_link> <updated>2017-09-18T14:59:58Z</updated> <title>#341 USB Power Supply Kit</title> <summary>building a USB Wall Wart and taking a look at how they work .. instead of taking them apart or having them blow up</summary> <content type="html"><div><p>building a USB Wall Wart and taking a look at how they work .. instead of taking them apart or having them blow up</p><img src="https://leap.tardate.com/electronics101/power/usbpowersupplykit/assets/usbpowersupplykit_build.jpg" /></div></content> <category term="Power"/> <category term="USB"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/ixpando/</id> <link href="https://leap.tardate.com/boldportclub/ixpando/"/> <g:image_link>https://leap.tardate.com/boldportclub/ixpando/assets/ixpando_build.jpg</g:image_link> <updated>2017-09-10T15:58:21Z</updated> <title>#340 BoldportClub/IxpandO</title> <summary>an input/output expansion board based on Microchip's MCP23017, BoldportClub Project #16. Demo program covers digital output and interrupt-driven input</summary> <content type="html"><div><p>an input/output expansion board based on Microchip's MCP23017, BoldportClub Project #16. Demo program covers digital output and interrupt-driven input</p><img src="https://leap.tardate.com/boldportclub/ixpando/assets/ixpando_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="Port Expander"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/guitareffects/delaykit/</id> <link href="https://leap.tardate.com/electronics101/guitareffects/delaykit/"/> <g:image_link>https://leap.tardate.com/electronics101/guitareffects/delaykit/assets/delaykit_build.jpg</g:image_link> <updated>2016-08-28T13:00:37Z</updated> <title>#339 DelayKit</title> <summary>build and test a PT2399-based analogue delay pedal kit</summary> <content type="html"><div><p>build and test a PT2399-based analogue delay pedal kit</p><img src="https://leap.tardate.com/electronics101/guitareffects/delaykit/assets/delaykit_build.jpg" /></div></content> <category term="Guitar Effects"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/kraft/glowball/</id> <link href="https://leap.tardate.com/kraft/glowball/"/> <g:image_link>https://leap.tardate.com/kraft/glowball/assets/glowball_build.jpg</g:image_link> <updated>2019-04-22T12:07:30Z</updated> <title>#338 GlowBall</title> <summary>building LED effects for a Glass Eye Studio Celestial Planet Weight</summary> <content type="html"><div><p>building LED effects for a Glass Eye Studio Celestial Planet Weight</p><img src="https://leap.tardate.com/kraft/glowball/assets/glowball_build.jpg" /></div></content> <category term="LED"/> <category term="Oscillators"/> <category term="Power"/> <category term="Craft"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/rgbledglow/</id> <link href="https://leap.tardate.com/electronics101/rgbledglow/"/> <g:image_link>https://leap.tardate.com/electronics101/rgbledglow/assets/rgbledglow_build.jpg</g:image_link> <updated>2017-08-19T17:23:25Z</updated> <title>#337 RGB LED Glow Effects</title> <summary>rainbow glow effects with an RGB LED and OpAmp oscillators</summary> <content type="html"><div><p>rainbow glow effects with an RGB LED and OpAmp oscillators</p><img src="https://leap.tardate.com/electronics101/rgbledglow/assets/rgbledglow_build.jpg" /></div></content> <category term="LED"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/comparatorrelaxation/</id> <link href="https://leap.tardate.com/electronics101/oscillators/comparatorrelaxation/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/comparatorrelaxation/assets/comparatorrelaxation_build.jpg</g:image_link> <updated>2021-08-17T08:14:50Z</updated> <title>#336 Comparator Relaxation Oscillator</title> <summary>test a classic comparator-based relaxation oscillator, modified for single-supply LM358 OpAmp</summary> <content type="html"><div><p>test a classic comparator-based relaxation oscillator, modified for single-supply LM358 OpAmp</p><img src="https://leap.tardate.com/electronics101/oscillators/comparatorrelaxation/assets/comparatorrelaxation_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/mcp2200/chaser/</id> <link href="https://leap.tardate.com/electronics101/mcp2200/chaser/"/> <g:image_link>https://leap.tardate.com/electronics101/mcp2200/chaser/assets/chaser_build.jpg</g:image_link> <updated>2017-08-18T12:09:50Z</updated> <title>#335 MCP2200 Chaser</title> <summary>using the MCP2200 GPIO from MacOSX. With great power comes great responsibility to blink LEDs</summary> <content type="html"><div><p>using the MCP2200 GPIO from MacOSX. With great power comes great responsibility to blink LEDs</p><img src="https://leap.tardate.com/electronics101/mcp2200/chaser/assets/chaser_build.jpg" /></div></content> <category term="UART"/> <category term="USB"/> <category term="LED"/> <category term="MCP2200"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/mcp2200/devkit/</id> <link href="https://leap.tardate.com/electronics101/mcp2200/devkit/"/> <g:image_link>https://leap.tardate.com/electronics101/mcp2200/devkit/assets/devkit_build.jpg</g:image_link> <updated>2017-08-13T13:10:22Z</updated> <title>#334 MCP2200 DevKit</title> <summary>exploring the capabilities of the MCP2200 USB-to-UART and program it from a macOS host</summary> <content type="html"><div><p>exploring the capabilities of the MCP2200 USB-to-UART and program it from a macOS host</p><img src="https://leap.tardate.com/electronics101/mcp2200/devkit/assets/devkit_build.jpg" /></div></content> <category term="UART"/> <category term="USB"/> <category term="MCP2200"/> </entry> <entry> <id>https://leap.tardate.com/playground/voltageselfmeasurement/</id> <link href="https://leap.tardate.com/playground/voltageselfmeasurement/"/> <g:image_link>https://leap.tardate.com/playground/voltageselfmeasurement/assets/voltageselfmeasurement_build.jpg</g:image_link> <updated>2017-08-14T17:10:59Z</updated> <title>#333 VoltageSelfMeasurement</title> <summary>self-measurement of an Arduino's supply voltage (Vcc)</summary> <content type="html"><div><p>self-measurement of an Arduino's supply voltage (Vcc)</p><img src="https://leap.tardate.com/playground/voltageselfmeasurement/assets/voltageselfmeasurement_build.jpg" /></div></content> <category term="Arduino"/> <category term="ADC"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/rcphaseshiftbjt/</id> <link href="https://leap.tardate.com/electronics101/oscillators/rcphaseshiftbjt/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/rcphaseshiftbjt/assets/rcphaseshiftbjt_build.jpg</g:image_link> <updated>2017-08-12T14:32:19Z</updated> <title>#332 RCPhaseShiftBJT</title> <summary>testing an RC phase-shift oscillator using a BJT amplifier</summary> <content type="html"><div><p>testing an RC phase-shift oscillator using a BJT amplifier</p><img src="https://leap.tardate.com/electronics101/oscillators/rcphaseshiftbjt/assets/rcphaseshiftbjt_build.jpg" /></div></content> <category term="BJT"/> <category term="RC"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/pic/gettingblinky/</id> <link href="https://leap.tardate.com/pic/gettingblinky/"/> <g:image_link>https://leap.tardate.com/pic/gettingblinky/assets/gettingblinky_build.jpg</g:image_link> <updated>2017-08-08T01:40:16Z</updated> <title>#331 PIC Getting Blinky</title> <summary>getting up and running building a PIC assembler project on MacOSX with a PIC12F675 development board. Let's get Blinky!</summary> <content type="html"><div><p>getting up and running building a PIC assembler project on MacOSX with a PIC12F675 development board. Let's get Blinky!</p><img src="https://leap.tardate.com/pic/gettingblinky/assets/gettingblinky_build.jpg" /></div></content> <category term="PIC"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/any2anypowerpack/</id> <link href="https://leap.tardate.com/electronics101/power/any2anypowerpack/"/> <g:image_link>https://leap.tardate.com/electronics101/power/any2anypowerpack/assets/any2anypowerpack_build.jpg</g:image_link> <updated>2017-08-06T10:50:27Z</updated> <title>#330 Any 2 Any Power Pack</title> <summary>a 2.1mm DC adapter pack with battery bypass and any-polarity to any-polarity connectors</summary> <content type="html"><div><p>a 2.1mm DC adapter pack with battery bypass and any-polarity to any-polarity connectors</p><img src="https://leap.tardate.com/electronics101/power/any2anypowerpack/assets/any2anypowerpack_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/connectors/power/</id> <link href="https://leap.tardate.com/electronics101/connectors/power/"/> <g:image_link>https://leap.tardate.com/electronics101/connectors/power/assets/power_build.jpg</g:image_link> <updated>2017-10-08T12:15:54Z</updated> <title>#329 PowerConnectors</title> <summary>obsessing over all manner of DC power connectors</summary> <content type="html"><div><p>obsessing over all manner of DC power connectors</p><img src="https://leap.tardate.com/electronics101/connectors/power/assets/power_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/voltagecontrolledoscillator/</id> <link href="https://leap.tardate.com/electronics101/555timer/voltagecontrolledoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/voltagecontrolledoscillator/assets/voltagecontrolledoscillator_build.jpg</g:image_link> <updated>2017-08-03T17:39:45Z</updated> <title>#328 555 Voltage Controlled Oscillator</title> <summary>a voltage-controlled oscillator (VCO) using the 555 timer</summary> <content type="html"><div><p>a voltage-controlled oscillator (VCO) using the 555 timer</p><img src="https://leap.tardate.com/electronics101/555timer/voltagecontrolledoscillator/assets/voltagecontrolledoscillator_build.jpg" /></div></content> <category term="Oscillators"/> <category term="VCO"/> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/mixers/rfdiodering/</id> <link href="https://leap.tardate.com/electronics101/mixers/rfdiodering/"/> <g:image_link>https://leap.tardate.com/electronics101/mixers/rfdiodering/assets/rfdiodering_build.jpg</g:image_link> <updated>2018-07-08T04:38:55Z</updated> <title>#327 RF Diode Ring Mixer</title> <summary>a diode ring double-balanced frequency mixer</summary> <content type="html"><div><p>a diode ring double-balanced frequency mixer</p><img src="https://leap.tardate.com/electronics101/mixers/rfdiodering/assets/rfdiodering_build.jpg" /></div></content> <category term="Radio"/> <category term="Mixers"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/mixers/</id> <link href="https://leap.tardate.com/electronics101/mixers/"/> <g:image_link>https://leap.tardate.com/electronics101/mixers/assets/mixers_build.jpg</g:image_link> <updated>2018-07-08T04:38:55Z</updated> <title>#326 Mixers</title> <summary>all about frequency mixers</summary> <content type="html"><div><p>all about frequency mixers</p><img src="https://leap.tardate.com/electronics101/mixers/assets/mixers_build.jpg" /></div></content> <category term="Radio"/> <category term="Mixers"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/spoolt/</id> <link href="https://leap.tardate.com/boldportclub/spoolt/"/> <g:image_link>https://leap.tardate.com/boldportclub/spoolt/assets/spoolt_build.jpg</g:image_link> <updated>2017-07-23T06:38:43Z</updated> <title>#325 BoldportClub spoolt</title> <summary>pimp my spoolt - the Boldport Club solder dispenser (Project #15, July 2017)</summary> <content type="html"><div><p>pimp my spoolt - the Boldport Club solder dispenser (Project #15, July 2017)</p><img src="https://leap.tardate.com/boldportclub/spoolt/assets/spoolt_build.jpg" /></div></content> <category term="Boldport"/> <category term="Soldering"/> </entry> <entry> <id>https://leap.tardate.com/equipment/labrador/</id> <link href="https://leap.tardate.com/equipment/labrador/"/> <g:image_link>https://leap.tardate.com/equipment/labrador/assets/labrador_build.jpg</g:image_link> <updated>2018-09-18T12:38:41Z</updated> <title>#324 Labrador</title> <summary>first look at the EspoTek Labrador USB "lab-on-a-board" hardware and software</summary> <content type="html"><div><p>first look at the EspoTek Labrador USB "lab-on-a-board" hardware and software</p><img src="https://leap.tardate.com/equipment/labrador/assets/labrador_build.jpg" /></div></content> <category term="Tools"/> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/stringy/</id> <link href="https://leap.tardate.com/boldportclub/stringy/"/> <g:image_link>https://leap.tardate.com/boldportclub/stringy/assets/stringy_build.jpg</g:image_link> <updated>2017-06-26T13:46:46Z</updated> <title>#323 BoldportClub/stringy</title> <summary>building and playing (mainly playing) the Boldport Club Stringy (Project #14)</summary> <content type="html"><div><p>building and playing (mainly playing) the Boldport Club Stringy (Project #14)</p><img src="https://leap.tardate.com/boldportclub/stringy/assets/stringy_build.jpg" /></div></content> <category term="Boldport"/> <category term="PIC"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/cordwood-too/fidgetcube/</id> <link href="https://leap.tardate.com/boldportclub/cordwood-too/fidgetcube/"/> <g:image_link>https://leap.tardate.com/boldportclub/cordwood-too/fidgetcube/assets/fidgetcube_build.jpg</g:image_link> <updated>2017-06-25T07:07:04Z</updated> <title>#322 BoldportClub/cordwood-too/FidgetCube</title> <summary>making a Fidget Cube controller for the Boldport Cordwood Too</summary> <content type="html"><div><p>making a Fidget Cube controller for the Boldport Cordwood Too</p><img src="https://leap.tardate.com/boldportclub/cordwood-too/fidgetcube/assets/fidgetcube_build.jpg" /></div></content> <category term="Boldport"/> <category term="Sensors"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/cordwood-too/</id> <link href="https://leap.tardate.com/boldportclub/cordwood-too/"/> <g:image_link>https://leap.tardate.com/boldportclub/cordwood-too/assets/cordwood-too_build.jpg</g:image_link> <updated>2017-06-13T00:52:36Z</updated> <title>#321 BoldportClub/cordwood-too</title> <summary>the Cordwood Puzzle returns! Boldport Club Project #13, May 2017</summary> <content type="html"><div><p>the Cordwood Puzzle returns! Boldport Club Project #13, May 2017</p><img src="https://leap.tardate.com/boldportclub/cordwood-too/assets/cordwood-too_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitallogic/syncjkcounter/</id> <link href="https://leap.tardate.com/electronics101/digitallogic/syncjkcounter/"/> <g:image_link>https://leap.tardate.com/electronics101/digitallogic/syncjkcounter/assets/syncjkcounter_build.jpg</g:image_link> <updated>2019-09-07T08:50:36Z</updated> <title>#320 Synchronous JK Counter</title> <summary>a synchronous 8-bit counter built with JK Flip-Flops</summary> <content type="html"><div><p>a synchronous 8-bit counter built with JK Flip-Flops</p><img src="https://leap.tardate.com/electronics101/digitallogic/syncjkcounter/assets/syncjkcounter_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Digital Logic"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/digitallogicclock/</id> <link href="https://leap.tardate.com/electronics101/555timer/digitallogicclock/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/digitallogicclock/assets/digitallogicclock_build.jpg</g:image_link> <updated>2017-05-22T12:36:50Z</updated> <title>#319 DigitalLogicClock</title> <summary>build a flexible, low-frequency digital logic clock module</summary> <content type="html"><div><p>build a flexible, low-frequency digital logic clock module</p><img src="https://leap.tardate.com/electronics101/555timer/digitallogicclock/assets/digitallogicclock_build.jpg" /></div></content> <category term="555 Timer"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/bistable/</id> <link href="https://leap.tardate.com/electronics101/555timer/bistable/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/bistable/assets/bistable_build.jpg</g:image_link> <updated>2017-05-21T15:27:04Z</updated> <title>#318 Bistable</title> <summary>using the 555 timer as a bistable latch and button debouncer</summary> <content type="html"><div><p>using the 555 timer as a bistable latch and button debouncer</p><img src="https://leap.tardate.com/electronics101/555timer/bistable/assets/bistable_build.jpg" /></div></content> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/schmitttrigger/basicdiscrete/</id> <link href="https://leap.tardate.com/electronics101/schmitttrigger/basicdiscrete/"/> <g:image_link>https://leap.tardate.com/electronics101/schmitttrigger/basicdiscrete/assets/basicdiscrete_build.jpg</g:image_link> <updated>2020-03-28T11:39:15Z</updated> <title>#317 Discrete Schmitt Trigger</title> <summary>Exploring a basic emitter-coupled Schmitt Trigger circuit design with discrete components</summary> <content type="html"><div><p>Exploring a basic emitter-coupled Schmitt Trigger circuit design with discrete components</p><img src="https://leap.tardate.com/electronics101/schmitttrigger/basicdiscrete/assets/basicdiscrete_build.jpg" /></div></content> <category term="BJT"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/qsopbreakout/</id> <link href="https://leap.tardate.com/boldportclub/qsopbreakout/"/> <g:image_link>https://leap.tardate.com/boldportclub/qsopbreakout/assets/qsopbreakout_build.jpg</g:image_link> <updated>2016-12-11T16:18:21Z</updated> <title>#316 BoldportClub/QSOPBreakout</title> <summary>all about soldering and the Boldport Club QSOP breakout board</summary> <content type="html"><div><p>all about soldering and the Boldport Club QSOP breakout board</p><img src="https://leap.tardate.com/boldportclub/qsopbreakout/assets/qsopbreakout_build.jpg" /></div></content> <category term="Boldport"/> <category term="Soldering"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mt3608/variableboost/</id> <link href="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mt3608/variableboost/"/> <g:image_link>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mt3608/variableboost/assets/variableboost_build.jpg</g:image_link> <updated>2020-10-09T15:28:17Z</updated> <title>#315 MT3608 Variable Boost</title> <summary>testing the canonical variable boost circuit using the MT3608 High Efficiency 1.2MHz 2A Step Up Converter</summary> <content type="html"><div><p>testing the canonical variable boost circuit using the MT3608 High Efficiency 1.2MHz 2A Step Up Converter</p><img src="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/mt3608/variableboost/assets/variableboost_build.jpg" /></div></content> <category term="Power"/> <category term="SMPS"/> </entry> <entry> <id>https://leap.tardate.com/playground/eeprom/at28c16/peprogrammer/</id> <link href="https://leap.tardate.com/playground/eeprom/at28c16/peprogrammer/"/> <g:image_link>https://leap.tardate.com/playground/eeprom/at28c16/peprogrammer/assets/peprogrammer_build.jpg</g:image_link> <updated>2020-10-02T13:02:32Z</updated> <title>#314 AT28C16 EEPROM Programmer</title> <summary>programming an AT28C16 64k EEPROM with an Arduino and MCP23S17 16-bit port expander</summary> <content type="html"><div><p>programming an AT28C16 64k EEPROM with an Arduino and MCP23S17 16-bit port expander</p><img src="https://leap.tardate.com/playground/eeprom/at28c16/peprogrammer/assets/peprogrammer_build.jpg" /></div></content> <category term="EEPROM"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/mcp23s17/</id> <link href="https://leap.tardate.com/electronics101/mcp23s17/"/> <g:image_link>https://leap.tardate.com/electronics101/mcp23s17/assets/mcp23s17_build.jpg</g:image_link> <updated>2017-05-07T10:46:58Z</updated> <title>#313 MCP23S17</title> <summary>investigate and test the MCP23S17 16-Bit I/O Expander with serial interface</summary> <content type="html"><div><p>investigate and test the MCP23S17 16-Bit I/O Expander with serial interface</p><img src="https://leap.tardate.com/electronics101/mcp23s17/assets/mcp23s17_build.jpg" /></div></content> <category term="Arduino"/> <category term="Port Expander"/> <category term="MCP23S17"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/thematrix/firecracker/</id> <link href="https://leap.tardate.com/boldportclub/thematrix/firecracker/"/> <g:image_link>https://leap.tardate.com/boldportclub/thematrix/firecracker/assets/firecracker_build.jpg</g:image_link> <updated>2017-05-01T02:55:42Z</updated> <title>#312 TheMatrix/Firecracker</title> <summary>a firecracker simulacrum running on the BoldportClub Matrix</summary> <content type="html"><div><p>a firecracker simulacrum running on the BoldportClub Matrix</p><img src="https://leap.tardate.com/boldportclub/thematrix/firecracker/assets/firecracker_build.jpg" /></div></content> <category term="Boldport"/> <category term="LED"/> <category term="AS1130"/> <category term="Sensors"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/juice/</id> <link href="https://leap.tardate.com/boldportclub/juice/"/> <g:image_link>https://leap.tardate.com/boldportclub/juice/assets/juice_build.jpg</g:image_link> <updated>2017-04-29T14:47:56Z</updated> <title>#311 BoldportClub/Juice</title> <summary>building the Boldport Juice battery replacement kit (Project #12)</summary> <content type="html"><div><p>building the Boldport Juice battery replacement kit (Project #12)</p><img src="https://leap.tardate.com/boldportclub/juice/assets/juice_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/radio/fm/tea5767/</id> <link href="https://leap.tardate.com/radio/fm/tea5767/"/> <g:image_link>https://leap.tardate.com/radio/fm/tea5767/assets/tea5767_build.jpg</g:image_link> <updated>2019-08-04T11:25:24Z</updated> <title>#310 TEA5767 FM Receiver</title> <summary>controlling the TEA5767 low-power FM stereo radio chip with an Arduino</summary> <content type="html"><div><p>controlling the TEA5767 low-power FM stereo radio chip with an Arduino</p><img src="https://leap.tardate.com/radio/fm/tea5767/assets/tea5767_build.jpg" /></div></content> <category term="Radio"/> <category term="FM"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/connectors/audio/</id> <link href="https://leap.tardate.com/electronics101/connectors/audio/"/> <g:image_link>https://leap.tardate.com/electronics101/connectors/audio/assets/audio_build.jpg</g:image_link> <updated>2017-10-08T12:15:54Z</updated> <title>#309 AudioConnectors</title> <summary>notes on miscellaneous audio connectors</summary> <content type="html"><div><p>notes on miscellaneous audio connectors</p><img src="https://leap.tardate.com/electronics101/connectors/audio/assets/audio_build.jpg" /></div></content> <category term="Audio"/> <category term="Connectors"/> </entry> <entry> <id>https://leap.tardate.com/playground/led7segment/combinationallogicdriver/</id> <link href="https://leap.tardate.com/playground/led7segment/combinationallogicdriver/"/> <g:image_link>https://leap.tardate.com/playground/led7segment/combinationallogicdriver/assets/combinationallogicdriver_build.jpg</g:image_link> <updated>2020-10-02T13:02:32Z</updated> <title>#308 7-Segment Combinational Logic</title> <summary>- dust off some combinational logic methods and build a 8421-BCD to 7-segment LED driver with 7400 series logic</summary> <content type="html"><div><p>- dust off some combinational logic methods and build a 8421-BCD to 7-segment LED driver with 7400 series logic</p><img src="https://leap.tardate.com/playground/led7segment/combinationallogicdriver/assets/combinationallogicdriver_build.jpg" /></div></content> <category term="LED"/> <category term="LED 7-Segment"/> <category term="CMOS/TTL"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/thematrix/keypadcontrol/</id> <link href="https://leap.tardate.com/boldportclub/thematrix/keypadcontrol/"/> <g:image_link>https://leap.tardate.com/boldportclub/thematrix/keypadcontrol/assets/keypadcontrol_build.jpg</g:image_link> <updated>2017-04-17T16:57:12Z</updated> <title>#307 TheMatrix/KeypadControl</title> <summary>use a 20-button keypad to write a scrolling message on the Boldport Matrix</summary> <content type="html"><div><p>use a 20-button keypad to write a scrolling message on the Boldport Matrix</p><img src="https://leap.tardate.com/boldportclub/thematrix/keypadcontrol/assets/keypadcontrol_build.jpg" /></div></content> <category term="Boldport"/> <category term="LED"/> <category term="AS1130"/> </entry> <entry> <id>https://leap.tardate.com/playground/keyboardmatrixmodule/switchinterrupts/</id> <link href="https://leap.tardate.com/playground/keyboardmatrixmodule/switchinterrupts/"/> <g:image_link>https://leap.tardate.com/playground/keyboardmatrixmodule/switchinterrupts/assets/switchinterrupts_build.jpg</g:image_link> <updated>2015-12-13T12:52:40Z</updated> <title>#306 KeyboardMatrixModule/SwitchInterrupts</title> <summary>demo interrupt-driven switch input on a simple pushbutton/LED matrix module and how to use the EnableInterrupt library</summary> <content type="html"><div><p>demo interrupt-driven switch input on a simple pushbutton/LED matrix module and how to use the EnableInterrupt library</p><img src="https://leap.tardate.com/playground/keyboardmatrixmodule/switchinterrupts/assets/switchinterrupts_build.jpg" /></div></content> <category term="Arduino"/> <category term="Human Input"/> </entry> <entry> <id>https://leap.tardate.com/playground/keyboardmatrixmodule/ledcontrol/</id> <link href="https://leap.tardate.com/playground/keyboardmatrixmodule/ledcontrol/"/> <g:image_link>https://leap.tardate.com/playground/keyboardmatrixmodule/ledcontrol/assets/ledcontrol_build.jpg</g:image_link> <updated>2015-12-13T12:52:40Z</updated> <title>#305 KeyboardMatrixModule/LedControl</title> <summary>demo controlling the LEDs on a simple pushbutton/LED matrix module</summary> <content type="html"><div><p>demo controlling the LEDs on a simple pushbutton/LED matrix module</p><img src="https://leap.tardate.com/playground/keyboardmatrixmodule/ledcontrol/assets/ledcontrol_build.jpg" /></div></content> <category term="Arduino"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/playground/keyboardmatrixmodule/keymatrixinput/</id> <link href="https://leap.tardate.com/playground/keyboardmatrixmodule/keymatrixinput/"/> <g:image_link>https://leap.tardate.com/playground/keyboardmatrixmodule/keymatrixinput/assets/keymatrixinput_build.jpg</g:image_link> <updated>2015-12-13T12:52:40Z</updated> <title>#304 KeyboardMatrixModule/KeyMatrixInput</title> <summary>demo multiplexed key input on a simple pushbutton/LED matrix module and how to use INPUT_PULLUP</summary> <content type="html"><div><p>demo multiplexed key input on a simple pushbutton/LED matrix module and how to use INPUT_PULLUP</p><img src="https://leap.tardate.com/playground/keyboardmatrixmodule/keymatrixinput/assets/keymatrixinput_build.jpg" /></div></content> <category term="Arduino"/> <category term="Human Input"/> </entry> <entry> <id>https://leap.tardate.com/playground/keyboardmatrixmodule/</id> <link href="https://leap.tardate.com/playground/keyboardmatrixmodule/"/> <g:image_link>https://leap.tardate.com/playground/keyboardmatrixmodule/assets/keyboardmatrixmodule_build.jpg</g:image_link> <updated>2015-12-13T12:52:40Z</updated> <title>#303 KeyboardMatrixModule</title> <summary>demo a simple pushbutton/LED matrix module</summary> <content type="html"><div><p>demo a simple pushbutton/LED matrix module</p><img src="https://leap.tardate.com/playground/keyboardmatrixmodule/assets/keyboardmatrixmodule_build.jpg" /></div></content> <category term="Arduino"/> <category term="LED"/> <category term="Human Input"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/thematrix/gameoflife/</id> <link href="https://leap.tardate.com/boldportclub/thematrix/gameoflife/"/> <g:image_link>https://leap.tardate.com/boldportclub/thematrix/gameoflife/assets/gameoflife_build.jpg</g:image_link> <updated>2017-04-17T16:57:12Z</updated> <title>#302 TheMatrix/GameOfLife</title> <summary>a simple implementation of Conway's Game of Life on the BoldportClub Matrix</summary> <content type="html"><div><p>a simple implementation of Conway's Game of Life on the BoldportClub Matrix</p><img src="https://leap.tardate.com/boldportclub/thematrix/gameoflife/assets/gameoflife_build.jpg" /></div></content> <category term="Boldport"/> <category term="LED"/> <category term="AS1130"/> </entry> <entry> <id>https://leap.tardate.com/playground/dht11/basics/</id> <link href="https://leap.tardate.com/playground/dht11/basics/"/> <g:image_link>https://leap.tardate.com/playground/dht11/basics/assets/basics_build.jpg</g:image_link> <updated>2021-03-04T11:35:17Z</updated> <title>#301 DHT11 Basics</title> <summary>test basic temperature and humidity readings with the DHT11 sensor</summary> <content type="html"><div><p>test basic temperature and humidity readings with the DHT11 sensor</p><img src="https://leap.tardate.com/playground/dht11/basics/assets/basics_build.jpg" /></div></content> <category term="Sensors"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/thematrix/ledtest/</id> <link href="https://leap.tardate.com/boldportclub/thematrix/ledtest/"/> <g:image_link>https://leap.tardate.com/boldportclub/thematrix/ledtest/assets/ledtest_build.jpg</g:image_link> <updated>2017-04-17T16:57:12Z</updated> <title>#300 TheMatrix/LedTest</title> <summary>testing The Matrix (Boldport Club project #11) with @luckyresistor's LRAS1130 library</summary> <content type="html"><div><p>testing The Matrix (Boldport Club project #11) with @luckyresistor's LRAS1130 library</p><img src="https://leap.tardate.com/boldportclub/thematrix/ledtest/assets/ledtest_build.jpg" /></div></content> <category term="Boldport"/> <category term="LED"/> <category term="AS1130"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/thematrix/</id> <link href="https://leap.tardate.com/boldportclub/thematrix/"/> <g:image_link>https://leap.tardate.com/boldportclub/thematrix/assets/thematrix_build.jpg</g:image_link> <updated>2017-04-17T16:57:12Z</updated> <title>#299 BoldportClub/TheMatrix</title> <summary>building The Matrix (Boldport Club project #11) is an I²C-controlled 24x5 LED matrix display, powered by an AMS AS1130 LED driver</summary> <content type="html"><div><p>building The Matrix (Boldport Club project #11) is an I²C-controlled 24x5 LED matrix display, powered by an AMS AS1130 LED driver</p><img src="https://leap.tardate.com/boldportclub/thematrix/assets/thematrix_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="LED"/> <category term="AS1130"/> </entry> <entry> <id>https://leap.tardate.com/equipment/handheldsolderingirons/</id> <link href="https://leap.tardate.com/equipment/handheldsolderingirons/"/> <g:image_link>https://leap.tardate.com/equipment/handheldsolderingirons/assets/handheldsolderingirons_build.jpg</g:image_link> <updated>2025-01-26T08:52:00Z</updated> <title>#298 Handheld Soldering Irons</title> <summary>Notes on my experiences with various cheap hand-held soldering irons</summary> <content type="html"><div><p>Notes on my experiences with various cheap hand-held soldering irons</p><img src="https://leap.tardate.com/equipment/handheldsolderingirons/assets/handheldsolderingirons_build.jpg" /></div></content> <category term="Tools"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd4070/oscillator/</id> <link href="https://leap.tardate.com/electronics101/cd4070/oscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/cd4070/oscillator/assets/oscillator_build.jpg</g:image_link> <updated>2022-09-16T13:35:07Z</updated> <title>#297 CD4070 Oscillator</title> <summary>examine a classic CD4070 oscillator design and variations</summary> <content type="html"><div><p>examine a classic CD4070 oscillator design and variations</p><img src="https://leap.tardate.com/electronics101/cd4070/oscillator/assets/oscillator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="CD4070"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/qsopbreakout/solarpendulum/</id> <link href="https://leap.tardate.com/boldportclub/qsopbreakout/solarpendulum/"/> <g:image_link>https://leap.tardate.com/boldportclub/qsopbreakout/solarpendulum/assets/solarpendulum_build.jpg</g:image_link> <updated>2017-03-14T11:11:40Z</updated> <title>#296 SolarPendulum</title> <summary>build a solar-powered pendulum similar to the popular "solar wobble/flip-flop toys" on the Boldport QSOP breakout board</summary> <content type="html"><div><p>build a solar-powered pendulum similar to the popular "solar wobble/flip-flop toys" on the Boldport QSOP breakout board</p><img src="https://leap.tardate.com/boldportclub/qsopbreakout/solarpendulum/assets/solarpendulum_build.jpg" /></div></content> <category term="Boldport"/> <category term="Solar"/> </entry> <entry> <id>https://leap.tardate.com/equipment/frequencycounterkit/</id> <link href="https://leap.tardate.com/equipment/frequencycounterkit/"/> <g:image_link>https://leap.tardate.com/equipment/frequencycounterkit/assets/frequencycounterkit_build.jpg</g:image_link> <updated>2018-09-18T12:38:41Z</updated> <title>#295 Frequency Counter Kit</title> <summary>build and test a common PIC-based frequency counter kit</summary> <content type="html"><div><p>build and test a common PIC-based frequency counter kit</p><img src="https://leap.tardate.com/equipment/frequencycounterkit/assets/frequencycounterkit_build.jpg" /></div></content> <category term="PIC"/> <category term="Tools"/> <category term="Test Equipment"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd4060/crystaloscillator/</id> <link href="https://leap.tardate.com/electronics101/cd4060/crystaloscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/cd4060/crystaloscillator/assets/crystaloscillator_build.jpg</g:image_link> <updated>2022-09-16T13:35:07Z</updated> <title>#294 CD4060 Crystal Oscillator</title> <summary>exploring the behaviour of the CD4060 ripple counter driven by a crystal oscillator</summary> <content type="html"><div><p>exploring the behaviour of the CD4060 ripple counter driven by a crystal oscillator</p><img src="https://leap.tardate.com/electronics101/cd4060/crystaloscillator/assets/crystaloscillator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Oscillators"/> <category term="CD4060"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd4060/rcoscillator/</id> <link href="https://leap.tardate.com/electronics101/cd4060/rcoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/cd4060/rcoscillator/assets/rcoscillator_build.jpg</g:image_link> <updated>2022-09-16T13:35:07Z</updated> <title>#293 CD4060 RC Oscillator</title> <summary>exploring the behaviour of the CD4060 ripple counter driven by an RC oscillator</summary> <content type="html"><div><p>exploring the behaviour of the CD4060 ripple counter driven by an RC oscillator</p><img src="https://leap.tardate.com/electronics101/cd4060/rcoscillator/assets/rcoscillator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Oscillators"/> <category term="CD4060"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioeffectschips/h823/</id> <link href="https://leap.tardate.com/audio/audioeffectschips/h823/"/> <g:image_link>https://leap.tardate.com/audio/audioeffectschips/h823/assets/h823_build.jpg</g:image_link> <updated>2019-09-25T15:49:49Z</updated> <title>#292 H823 Audio Effects Chip</title> <summary>figuring out how to use the H823 "Happy Birthday" music chip</summary> <content type="html"><div><p>figuring out how to use the H823 "Happy Birthday" music chip</p><img src="https://leap.tardate.com/audio/audioeffectschips/h823/assets/h823_build.jpg" /></div></content> <category term="Audio"/> <category term="Music Chips"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd4060/musiclightkit/</id> <link href="https://leap.tardate.com/electronics101/cd4060/musiclightkit/"/> <g:image_link>https://leap.tardate.com/electronics101/cd4060/musiclightkit/assets/musiclightkit_build.jpg</g:image_link> <updated>2017-02-16T13:40:28Z</updated> <title>#291 Music Light Kit</title> <summary>learning how to use the CD4060 14-Stage Ripple Carry Binary Counter by building a music/LED-effects kit</summary> <content type="html"><div><p>learning how to use the CD4060 14-Stage Ripple Carry Binary Counter by building a music/LED-effects kit</p><img src="https://leap.tardate.com/electronics101/cd4060/musiclightkit/assets/musiclightkit_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="CD4060"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/pissoff/</id> <link href="https://leap.tardate.com/boldportclub/pissoff/"/> <g:image_link>https://leap.tardate.com/boldportclub/pissoff/assets/pissoff_build.jpg</g:image_link> <updated>2017-02-15T09:17:56Z</updated> <title>#290 BoldportClub/PissOff</title> <summary>an angry barking blue-in-the-face mad proximity sensor - Boldport Club Project #9, November 2016</summary> <content type="html"><div><p>an angry barking blue-in-the-face mad proximity sensor - Boldport Club Project #9, November 2016</p><img src="https://leap.tardate.com/boldportclub/pissoff/assets/pissoff_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="NXP"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/meters/voltmeterammetermodule/</id> <link href="https://leap.tardate.com/electronics101/meters/voltmeterammetermodule/"/> <g:image_link>https://leap.tardate.com/electronics101/meters/voltmeterammetermodule/assets/voltmeterammetermodule_build.jpg</g:image_link> <updated>2019-09-02T00:30:13Z</updated> <title>#289 DC Voltmeter/Ammeter Modules</title> <summary>test and calibrate a DC Voltmeter/Ammeter panel module</summary> <content type="html"><div><p>test and calibrate a DC Voltmeter/Ammeter panel module</p><img src="https://leap.tardate.com/electronics101/meters/voltmeterammetermodule/assets/voltmeterammetermodule_build.jpg" /></div></content> <category term="Sensors"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/basicinvertingbuckboostavrcontrol/</id> <link href="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/basicinvertingbuckboostavrcontrol/"/> <g:image_link>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/basicinvertingbuckboostavrcontrol/assets/basicinvertingbuckboostavrcontrol_build.jpg</g:image_link> <updated>2017-05-06T10:05:14Z</updated> <title>#288 Basic AVR-controlled Inverting Buck-boost</title> <summary>build and test an inverting buck-boost converter controlled by an ATtiny85</summary> <content type="html"><div><p>build and test an inverting buck-boost converter controlled by an ATtiny85</p><img src="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/basicinvertingbuckboostavrcontrol/assets/basicinvertingbuckboostavrcontrol_build.jpg" /></div></content> <category term="Power"/> <category term="ATtiny"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ultrasonicalarm/</id> <link href="https://leap.tardate.com/electronics101/ultrasonicalarm/"/> <g:image_link>https://leap.tardate.com/electronics101/ultrasonicalarm/assets/ultrasonicalarm_build.jpg</g:image_link> <updated>2018-04-15T01:28:17Z</updated> <title>#287 Ultrasonic Alarm</title> <summary>build an ultrasonic motion alarm with the HC-SR04 module and discrete logic</summary> <content type="html"><div><p>build an ultrasonic motion alarm with the HC-SR04 module and discrete logic</p><img src="https://leap.tardate.com/electronics101/ultrasonicalarm/assets/ultrasonicalarm_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Sensors"/> <category term="CMOS/TTL"/> <category term="HC-SR04"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/switchpowernfet/</id> <link href="https://leap.tardate.com/electronics101/switchpowernfet/"/> <g:image_link>https://leap.tardate.com/electronics101/switchpowernfet/assets/switchpowernfet_build.jpg</g:image_link> <updated>2017-01-17T15:13:39Z</updated> <title>#286 SwitchPowerNFET</title> <summary>low-side n-channel MOSFET switching of large loads with a microcontroller</summary> <content type="html"><div><p>low-side n-channel MOSFET switching of large loads with a microcontroller</p><img src="https://leap.tardate.com/electronics101/switchpowernfet/assets/switchpowernfet_build.jpg" /></div></content> <category term="MOSFET"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/tap/</id> <link href="https://leap.tardate.com/boldportclub/tap/"/> <g:image_link>https://leap.tardate.com/boldportclub/tap/assets/tap_build.jpg</g:image_link> <updated>2017-01-23T02:41:07Z</updated> <title>#285 BoldportClub/tap</title> <summary>Harking back to an old Boldport project, which harks back to a 1974 Elektor article .. and the main IC (7400 NAND gate) is still available!</summary> <content type="html"><div><p>Harking back to an old Boldport project, which harks back to a 1974 Elektor article .. and the main IC (7400 NAND gate) is still available!</p><img src="https://leap.tardate.com/boldportclub/tap/assets/tap_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/thegent/</id> <link href="https://leap.tardate.com/boldportclub/thegent/"/> <g:image_link>https://leap.tardate.com/boldportclub/thegent/assets/thegent_build.jpg</g:image_link> <updated>2017-12-08T02:08:15Z</updated> <title>#284 BoldportClub/TheGent</title> <summary>The Gent is Boldport Club Project #10 - a simple circuit on a beautiful board</summary> <content type="html"><div><p>The Gent is Boldport Club Project #10 - a simple circuit on a beautiful board</p><img src="https://leap.tardate.com/boldportclub/thegent/assets/thegent_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="Bugs"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitallogic/xorwithnandgates/</id> <link href="https://leap.tardate.com/electronics101/digitallogic/xorwithnandgates/"/> <g:image_link>https://leap.tardate.com/electronics101/digitallogic/xorwithnandgates/assets/xorwithnandgates_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#283 XOR With NAND Gates</title> <summary>construct an XOR gate with only an 74LS132 quad NAND gate, and demonstrate its behaviour with an Arduino and Processing</summary> <content type="html"><div><p>construct an XOR gate with only an 74LS132 quad NAND gate, and demonstrate its behaviour with an Arduino and Processing</p><img src="https://leap.tardate.com/electronics101/digitallogic/xorwithnandgates/assets/xorwithnandgates_build.jpg" /></div></content> <category term="Digital Logic"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/equipment/functiongeneratorkit/</id> <link href="https://leap.tardate.com/equipment/functiongeneratorkit/"/> <g:image_link>https://leap.tardate.com/equipment/functiongeneratorkit/assets/functiongeneratorkit_build.jpg</g:image_link> <updated>2018-09-18T12:38:41Z</updated> <title>#282 Function Generator Kit</title> <summary>build and test a function generator kit based on the XR-2206 monolithic function generator</summary> <content type="html"><div><p>build and test a function generator kit based on the XR-2206 monolithic function generator</p><img src="https://leap.tardate.com/equipment/functiongeneratorkit/assets/functiongeneratorkit_build.jpg" /></div></content> <category term="Oscillators"/> <category term="Tools"/> <category term="Test Equipment"/> <category term="XR2206"/> </entry> <entry> <id>https://leap.tardate.com/radio/fm/threestagetransmitter/</id> <link href="https://leap.tardate.com/radio/fm/threestagetransmitter/"/> <g:image_link>https://leap.tardate.com/radio/fm/threestagetransmitter/assets/threestagetransmitter_build.jpg</g:image_link> <updated>2019-08-04T11:25:24Z</updated> <title>#281 ThreeStageTransmitter</title> <summary>an ugly-style-in-a-can build of dazaro3's 3-stage FM transmitter circuit</summary> <content type="html"><div><p>an ugly-style-in-a-can build of dazaro3's 3-stage FM transmitter circuit</p><img src="https://leap.tardate.com/radio/fm/threestagetransmitter/assets/threestagetransmitter_build.jpg" /></div></content> <category term="Radio"/> <category term="FM"/> </entry> <entry> <id>https://leap.tardate.com/radio/fm/breadboardtransmitter/</id> <link href="https://leap.tardate.com/radio/fm/breadboardtransmitter/"/> <g:image_link>https://leap.tardate.com/radio/fm/breadboardtransmitter/assets/breadboardtransmitter_build.jpg</g:image_link> <updated>2019-08-04T11:25:24Z</updated> <title>#280 BreadboardTransmitter</title> <summary>build a simple 3-stage FM transmitter on a breadboard from a design by dazaro3</summary> <content type="html"><div><p>build a simple 3-stage FM transmitter on a breadboard from a design by dazaro3</p><img src="https://leap.tardate.com/radio/fm/breadboardtransmitter/assets/breadboardtransmitter_build.jpg" /></div></content> <category term="Radio"/> <category term="FM"/> </entry> <entry> <id>https://leap.tardate.com/radio/fm/singlestagetransmitterkit2/</id> <link href="https://leap.tardate.com/radio/fm/singlestagetransmitterkit2/"/> <g:image_link>https://leap.tardate.com/radio/fm/singlestagetransmitterkit2/assets/singlestagetransmitterkit2_build.jpg</g:image_link> <updated>2019-08-04T11:25:24Z</updated> <title>#279 Single-stage FM Transmitter Kit 2</title> <summary>build and tweak/tune another simple single-stage FM Transmitter Kit</summary> <content type="html"><div><p>build and tweak/tune another simple single-stage FM Transmitter Kit</p><img src="https://leap.tardate.com/radio/fm/singlestagetransmitterkit2/assets/singlestagetransmitterkit2_build.jpg" /></div></content> <category term="Radio"/> <category term="FM"/> <category term="Transmitter"/> </entry> <entry> <id>https://leap.tardate.com/equipment/componenttesterkit/</id> <link href="https://leap.tardate.com/equipment/componenttesterkit/"/> <g:image_link>https://leap.tardate.com/equipment/componenttesterkit/assets/componenttesterkit_build.jpg</g:image_link> <updated>2016-12-05T15:30:21Z</updated> <title>#278 Component Tester Kit</title> <summary>build and evaluate a popular ATMEAG328-based component tester kit</summary> <content type="html"><div><p>build and evaluate a popular ATMEAG328-based component tester kit</p><img src="https://leap.tardate.com/equipment/componenttesterkit/assets/componenttesterkit_build.jpg" /></div></content> <category term="Tools"/> <category term="Test Equipment"/> <category term="ATmega"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/touchy/</id> <link href="https://leap.tardate.com/boldportclub/touchy/"/> <g:image_link>https://leap.tardate.com/boldportclub/touchy/assets/touchy_build.jpg</g:image_link> <updated>2016-12-03T02:57:12Z</updated> <title>#277 BoldportClub/Touchy</title> <summary>Touchy is a capacitive touch input device with on-board Sleepy Bee microcontroller (Boldport Club Project #7)</summary> <content type="html"><div><p>Touchy is a capacitive touch input device with on-board Sleepy Bee microcontroller (Boldport Club Project #7)</p><img src="https://leap.tardate.com/boldportclub/touchy/assets/touchy_build.jpg" /></div></content> <category term="Boldport"/> <category term="EFM8"/> <category term="Sensors"/> </entry> <entry> <id>https://leap.tardate.com/playground/variablefrequencyrunwayleds/</id> <link href="https://leap.tardate.com/playground/variablefrequencyrunwayleds/"/> <g:image_link>https://leap.tardate.com/playground/variablefrequencyrunwayleds/assets/variablefrequencyrunwayleds_build.jpg</g:image_link> <updated>2016-12-01T13:22:04Z</updated> <title>#276 VariableFrequencyRunwayLEDs</title> <summary>a PWM-controlled variable frequency LED "runway lights" effect using the LM331 and CD4017</summary> <content type="html"><div><p>a PWM-controlled variable frequency LED "runway lights" effect using the LM331 and CD4017</p><img src="https://leap.tardate.com/playground/variablefrequencyrunwayleds/assets/variablefrequencyrunwayleds_build.jpg" /></div></content> <category term="LED"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/attiny/at8mhz/</id> <link href="https://leap.tardate.com/playground/attiny/at8mhz/"/> <g:image_link>https://leap.tardate.com/playground/attiny/at8mhz/assets/at8mhz_build.jpg</g:image_link> <updated>2020-02-17T17:45:56Z</updated> <title>#275 ATtiny at 8MHz</title> <summary>how to run an ATtiny85 microprocessor at 8MHz using the internal clock</summary> <content type="html"><div><p>how to run an ATtiny85 microprocessor at 8MHz using the internal clock</p><img src="https://leap.tardate.com/playground/attiny/at8mhz/assets/at8mhz_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> </entry> <entry> <id>https://leap.tardate.com/equipment/fy3200s/</id> <link href="https://leap.tardate.com/equipment/fy3200s/"/> <g:image_link>https://leap.tardate.com/equipment/fy3200s/assets/fy3200s_build.jpg</g:image_link> <updated>2016-09-06T09:20:04Z</updated> <title>#274 FY3200S</title> <summary>testing out the Feeltech FY3200S digital function generator</summary> <content type="html"><div><p>testing out the Feeltech FY3200S digital function generator</p><img src="https://leap.tardate.com/equipment/fy3200s/assets/fy3200s_build.jpg" /></div></content> <category term="Tools"/> <category term="Test Equipment"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/voltagecontrolledoscillator/</id> <link href="https://leap.tardate.com/electronics101/voltagecontrolledoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/voltagecontrolledoscillator/assets/voltagecontrolledoscillator_build.jpg</g:image_link> <updated>2016-11-20T22:37:26Z</updated> <title>#273 Voltage Controlled Oscillator</title> <summary>exploring varicap diodes (KV1471) and their use in frequency tuning of a Colpitts-style voltage-controlled oscillator</summary> <content type="html"><div><p>exploring varicap diodes (KV1471) and their use in frequency tuning of a Colpitts-style voltage-controlled oscillator</p><img src="https://leap.tardate.com/electronics101/voltagecontrolledoscillator/assets/voltagecontrolledoscillator_build.jpg" /></div></content> <category term="Oscillators"/> <category term="VCO"/> <category term="Varicap"/> </entry> <entry> <id>https://leap.tardate.com/equipment/saike909d/</id> <link href="https://leap.tardate.com/equipment/saike909d/"/> <g:image_link>https://leap.tardate.com/equipment/saike909d/assets/saike909d_build.jpg</g:image_link> <updated>2018-09-18T12:38:41Z</updated> <title>#272 Saike 909D</title> <summary>unboxing and initial review of the Saike 909D 3-in-1 hot air rework station</summary> <content type="html"><div><p>unboxing and initial review of the Saike 909D 3-in-1 hot air rework station</p><img src="https://leap.tardate.com/equipment/saike909d/assets/saike909d_build.jpg" /></div></content> <category term="Tools"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/cordwood/tuner/</id> <link href="https://leap.tardate.com/boldportclub/cordwood/tuner/"/> <g:image_link>https://leap.tardate.com/boldportclub/cordwood/tuner/assets/tuner_build.jpg</g:image_link> <updated>2016-11-19T06:52:15Z</updated> <title>#271 BoldportClub/cordwood/tuner</title> <summary>use the Boldport Cuttle & Cordwood as a guitar tuner, with a custom input preamp</summary> <content type="html"><div><p>use the Boldport Cuttle &amp; Cordwood as a guitar tuner, with a custom input preamp</p><img src="https://leap.tardate.com/boldportclub/cordwood/tuner/assets/tuner_build.jpg" /></div></content> <category term="Boldport"/> <category term="Cordwood"/> <category term="Arduino"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/cordwood/aanimate/</id> <link href="https://leap.tardate.com/boldportclub/cordwood/aanimate/"/> <g:image_link>https://leap.tardate.com/boldportclub/cordwood/aanimate/assets/aanimate_build.jpg</g:image_link> <updated>2016-11-13T10:51:39Z</updated> <title>#270 BoldportClub/cordwood/aanimate</title> <summary>run a demo animation using aaronjasso's Cordwood library</summary> <content type="html"><div><p>run a demo animation using aaronjasso's Cordwood library</p><img src="https://leap.tardate.com/boldportclub/cordwood/aanimate/assets/aanimate_build.jpg" /></div></content> <category term="Boldport"/> <category term="Cordwood"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/cordwood/</id> <link href="https://leap.tardate.com/boldportclub/cordwood/"/> <g:image_link>https://leap.tardate.com/boldportclub/cordwood/assets/cordwood_build.jpg</g:image_link> <updated>2016-11-19T06:52:15Z</updated> <title>#269 BoldportClub/cordwood</title> <summary>the Cordwood Puzzle evokes an era of stuffing massive components into small spaces without a clear idea of where this is all heading! Introducing the Boldport Club Project #3</summary> <content type="html"><div><p>the Cordwood Puzzle evokes an era of stuffing massive components into small spaces without a clear idea of where this is all heading! Introducing the Boldport Club Project #3</p><img src="https://leap.tardate.com/boldportclub/cordwood/assets/cordwood_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/playground/chainblocks/</id> <link href="https://leap.tardate.com/playground/chainblocks/"/> <g:image_link>https://leap.tardate.com/playground/chainblocks/assets/chainblocks_build.jpg</g:image_link> <updated>2016-11-06T21:11:20Z</updated> <title>#268 ChainBlocks</title> <summary>testing some "Chain Blocks" and demonstrate an XY Plotter block (with an MCP42010 digital potentiometer) by drawing the PrexLab logo on an Oscilloscope</summary> <content type="html"><div><p>testing some "Chain Blocks" and demonstrate an XY Plotter block (with an MCP42010 digital potentiometer) by drawing the PrexLab logo on an Oscilloscope</p><img src="https://leap.tardate.com/playground/chainblocks/assets/chainblocks_build.jpg" /></div></content> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/thecuttle/scopetag/</id> <link href="https://leap.tardate.com/boldportclub/thecuttle/scopetag/"/> <g:image_link>https://leap.tardate.com/boldportclub/thecuttle/scopetag/assets/scopetag_build.jpg</g:image_link> <updated>2019-09-02T00:30:13Z</updated> <title>#267 Cuttle Scope Tag</title> <summary>Get the Boldport Cuttle to write its name on a Digital Oscilloscope with an MCP42010 digital potentiometer</summary> <content type="html"><div><p>Get the Boldport Cuttle to write its name on a Digital Oscilloscope with an MCP42010 digital potentiometer</p><img src="https://leap.tardate.com/boldportclub/thecuttle/scopetag/assets/scopetag_build.jpg" /></div></content> <category term="Boldport"/> <category term="ATmega"/> <category term="ATmel"/> <category term="Arduino"/> <category term="Digital Pot"/> <category term="MCP42010"/> <category term="Oscilloscope"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/thecuttle/</id> <link href="https://leap.tardate.com/boldportclub/thecuttle/"/> <g:image_link>https://leap.tardate.com/boldportclub/thecuttle/assets/thecuttle_build.jpg</g:image_link> <updated>2016-11-06T05:40:24Z</updated> <title>#266 BoldportClub/TheCuttle</title> <summary>the most beautiful Arduino-compatible board you will ever see. Another soldering kit from The Boldport Club (Project #6)</summary> <content type="html"><div><p>the most beautiful Arduino-compatible board you will ever see. Another soldering kit from The Boldport Club (Project #6)</p><img src="https://leap.tardate.com/boldportclub/thecuttle/assets/thecuttle_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="ATmega"/> <category term="ATmel"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/xyplotter/</id> <link href="https://leap.tardate.com/playground/xyplotter/"/> <g:image_link>https://leap.tardate.com/playground/xyplotter/assets/xyplotter_build.jpg</g:image_link> <updated>2016-11-05T05:06:57Z</updated> <title>#265 XYplotter</title> <summary>draw pictures on a Digital Oscilloscope using an MCP42010 dual digital potentiometer and an Arduino. Of course, the first thing to try is the classic Christmas Tree</summary> <content type="html"><div><p>draw pictures on a Digital Oscilloscope using an MCP42010 dual digital potentiometer and an Arduino. Of course, the first thing to try is the classic Christmas Tree</p><img src="https://leap.tardate.com/playground/xyplotter/assets/xyplotter_build.jpg" /></div></content> <category term="Arduino"/> <category term="Digital Pot"/> <category term="MCP42010"/> <category term="Oscilloscope"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitalpots/mcp42010/</id> <link href="https://leap.tardate.com/electronics101/digitalpots/mcp42010/"/> <g:image_link>https://leap.tardate.com/electronics101/digitalpots/mcp42010/assets/mcp42010_build.jpg</g:image_link> <updated>2016-11-05T03:45:38Z</updated> <title>#264 DigitalPots/MCP42010</title> <summary>control the MCP42010 dual 10kΩ digital potentiometer with an Arduino and hardware SPI</summary> <content type="html"><div><p>control the MCP42010 dual 10kΩ digital potentiometer with an Arduino and hardware SPI</p><img src="https://leap.tardate.com/electronics101/digitalpots/mcp42010/assets/mcp42010_build.jpg" /></div></content> <category term="Arduino"/> <category term="Digital Pot"/> <category term="MCP42010"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/ligemdio/</id> <link href="https://leap.tardate.com/boldportclub/ligemdio/"/> <g:image_link>https://leap.tardate.com/boldportclub/ligemdio/assets/ligemdio_build.jpg</g:image_link> <updated>2016-11-08T18:02:04Z</updated> <title>#263 BoldportClub/ligemdio</title> <summary>an LED tester kit featureing a classic BJT constant current source. From The Boldport Club (Project #8)</summary> <content type="html"><div><p>an LED tester kit featureing a classic BJT constant current source. From The Boldport Club (Project #8)</p><img src="https://leap.tardate.com/boldportclub/ligemdio/assets/ligemdio_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="LED"/> <category term="BJT"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/guitareffects/bazzfuss/</id> <link href="https://leap.tardate.com/electronics101/guitareffects/bazzfuss/"/> <g:image_link>https://leap.tardate.com/electronics101/guitareffects/bazzfuss/assets/bazzfuss_build.jpg</g:image_link> <updated>2016-10-24T10:53:01Z</updated> <title>#262 BazzFuss</title> <summary>the Bazz Fuss "chocolate noisette" - a super-minimalist overdrive/distortion/fuzz effect circuit</summary> <content type="html"><div><p>the Bazz Fuss "chocolate noisette" - a super-minimalist overdrive/distortion/fuzz effect circuit</p><img src="https://leap.tardate.com/electronics101/guitareffects/bazzfuss/assets/bazzfuss_build.jpg" /></div></content> <category term="Guitar Effects"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitalpots/mcp4017/</id> <link href="https://leap.tardate.com/electronics101/digitalpots/mcp4017/"/> <g:image_link>https://leap.tardate.com/electronics101/digitalpots/mcp4017/assets/mcp4017_build.jpg</g:image_link> <updated>2016-10-23T13:30:36Z</updated> <title>#261 DigitalPots/MCP4017</title> <summary>control the MCP4017 single 7-Bit I²C digital potentiometer with an Arduino</summary> <content type="html"><div><p>control the MCP4017 single 7-Bit I²C digital potentiometer with an Arduino</p><img src="https://leap.tardate.com/electronics101/digitalpots/mcp4017/assets/mcp4017_build.jpg" /></div></content> <category term="Arduino"/> <category term="Digital Pot"/> <category term="MCP4017"/> </entry> <entry> <id>https://leap.tardate.com/equipment/saleaelogic/</id> <link href="https://leap.tardate.com/equipment/saleaelogic/"/> <g:image_link>https://leap.tardate.com/equipment/saleaelogic/assets/saleaelogic_build.jpg</g:image_link> <updated>2016-10-22T13:39:15Z</updated> <title>#260 SaleaeLogic</title> <summary>checking out a second-hand Saleae Logic (24 MS/s, 8 channel USB logic analyzer - that works on a Mac!!)</summary> <content type="html"><div><p>checking out a second-hand Saleae Logic (24 MS/s, 8 channel USB logic analyzer - that works on a Mac!!)</p><img src="https://leap.tardate.com/equipment/saleaelogic/assets/saleaelogic_build.jpg" /></div></content> <category term="Tools"/> <category term="Test Equipment"/> <category term="Logic Analyzer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitalpots/m62429/</id> <link href="https://leap.tardate.com/electronics101/digitalpots/m62429/"/> <g:image_link>https://leap.tardate.com/electronics101/digitalpots/m62429/assets/m62429_build.jpg</g:image_link> <updated>2016-10-22T10:04:15Z</updated> <title>#259 DigitalPots/M62429</title> <summary>control the M62429 dual channel volume control with an Arduino</summary> <content type="html"><div><p>control the M62429 dual channel volume control with an Arduino</p><img src="https://leap.tardate.com/electronics101/digitalpots/m62429/assets/m62429_build.jpg" /></div></content> <category term="Arduino"/> <category term="Digital Pot"/> <category term="M62429"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/clapswitchkit2/</id> <link href="https://leap.tardate.com/electronics101/clapswitchkit2/"/> <g:image_link>https://leap.tardate.com/electronics101/clapswitchkit2/assets/clapswitchkit2_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#258 Clap-switch Kit 2</title> <summary>practice some Boldport-style soldering on yet-another clap switch kit</summary> <content type="html"><div><p>practice some Boldport-style soldering on yet-another clap switch kit</p><img src="https://leap.tardate.com/electronics101/clapswitchkit2/assets/clapswitchkit2_build.jpg" /></div></content> <category term="Oscillators"/> <category term="BJT"/> <category term="Digital Logic"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/emergency/</id> <link href="https://leap.tardate.com/boldportclub/emergency/"/> <g:image_link>https://leap.tardate.com/boldportclub/emergency/assets/emergency_build.jpg</g:image_link> <updated>2016-11-19T06:52:15Z</updated> <title>#257 BoldportClub/Emergency</title> <summary>pimp the Boldport Club Emergency kit (Project #2) .. now a LED blinky with 3 passives and a transistor (Esaki Effect)</summary> <content type="html"><div><p>pimp the Boldport Club Emergency kit (Project #2) .. now a LED blinky with 3 passives and a transistor (Esaki Effect)</p><img src="https://leap.tardate.com/boldportclub/emergency/assets/emergency_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/pease/</id> <link href="https://leap.tardate.com/boldportclub/pease/"/> <g:image_link>https://leap.tardate.com/boldportclub/pease/assets/pease_build.jpg</g:image_link> <updated>2016-10-22T15:11:10Z</updated> <title>#256 BoldportClub/Pease</title> <summary>a Bob Pease tribute, LM331 voltage-to-frequency kit from The Boldport Club (Project #1)</summary> <content type="html"><div><p>a Bob Pease tribute, LM331 voltage-to-frequency kit from The Boldport Club (Project #1)</p><img src="https://leap.tardate.com/boldportclub/pease/assets/pease_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="LM331"/> </entry> <entry> <id>https://leap.tardate.com/playground/avrhardwarepwm/attiny/</id> <link href="https://leap.tardate.com/playground/avrhardwarepwm/attiny/"/> <g:image_link>https://leap.tardate.com/playground/avrhardwarepwm/attiny/assets/attiny_build.jpg</g:image_link> <updated>2016-10-11T17:04:34Z</updated> <title>#255 AvrHardwarePWM/ATtiny</title> <summary>all about hardware PWM and demonstrating the modes with the ATtiny85</summary> <content type="html"><div><p>all about hardware PWM and demonstrating the modes with the ATtiny85</p><img src="https://leap.tardate.com/playground/avrhardwarepwm/attiny/assets/attiny_build.jpg" /></div></content> <category term="ATtiny"/> <category term="ATmel"/> <category term="Arduino"/> <category term="PWM"/> </entry> <entry> <id>https://leap.tardate.com/playground/avrhardwarepwm/</id> <link href="https://leap.tardate.com/playground/avrhardwarepwm/"/> <g:image_link>https://leap.tardate.com/playground/avrhardwarepwm/assets/avrhardwarepwm_build.jpg</g:image_link> <updated>2016-10-11T17:04:34Z</updated> <title>#254 AvrHardwarePWM</title> <summary>all about hardware PWM and demonstrating the modes with the Arduino UNO/ATmega328</summary> <content type="html"><div><p>all about hardware PWM and demonstrating the modes with the Arduino UNO/ATmega328</p><img src="https://leap.tardate.com/playground/avrhardwarepwm/assets/avrhardwarepwm_build.jpg" /></div></content> <category term="ATmega"/> <category term="ATmel"/> <category term="Arduino"/> <category term="PWM"/> </entry> <entry> <id>https://leap.tardate.com/playground/attiny/programmingshield/</id> <link href="https://leap.tardate.com/playground/attiny/programmingshield/"/> <g:image_link>https://leap.tardate.com/playground/attiny/programmingshield/assets/programmingshield_build.jpg</g:image_link> <updated>2020-02-17T17:45:56Z</updated> <title>#253 ATtiny Programming Shield</title> <summary>a custom ATtiny programming shield for Arduino ISP</summary> <content type="html"><div><p>a custom ATtiny programming shield for Arduino ISP</p><img src="https://leap.tardate.com/playground/attiny/programmingshield/assets/programmingshield_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/messagewaiting/</id> <link href="https://leap.tardate.com/electronics101/555timer/messagewaiting/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/messagewaiting/assets/messagewaiting_build.jpg</g:image_link> <updated>2016-10-05T15:38:59Z</updated> <title>#252 Message Waiting</title> <summary>two-LED flasher with a 555 and minimal components - turned into a "message waiting" indicator with some free-wired SMD construction</summary> <content type="html"><div><p>two-LED flasher with a 555 and minimal components - turned into a "message waiting" indicator with some free-wired SMD construction</p><img src="https://leap.tardate.com/electronics101/555timer/messagewaiting/assets/messagewaiting_build.jpg" /></div></content> <category term="LED"/> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/boldportclub/thelady/</id> <link href="https://leap.tardate.com/boldportclub/thelady/"/> <g:image_link>https://leap.tardate.com/boldportclub/thelady/assets/thelady_build.jpg</g:image_link> <updated>2017-12-08T02:08:15Z</updated> <title>#251 BoldportClub/TheLady</title> <summary>a ladybird soldering and display kit from The Boldport Club (Project #4)</summary> <content type="html"><div><p>a ladybird soldering and display kit from The Boldport Club (Project #4)</p><img src="https://leap.tardate.com/boldportclub/thelady/assets/thelady_build.jpg" /></div></content> <category term="Boldport"/> <category term="PCB Design"/> <category term="Bugs"/> </entry> <entry> <id>https://leap.tardate.com/playground/pedalshielduno/audiodsp/</id> <link href="https://leap.tardate.com/playground/pedalshielduno/audiodsp/"/> <g:image_link>https://leap.tardate.com/playground/pedalshielduno/audiodsp/assets/audiodsp_build.jpg</g:image_link> <updated>2016-09-25T11:10:19Z</updated> <title>#250 pedalShieldUno/AudioDSP</title> <summary>test and develop the AudioDSP library for programming the pedalSHIELD Uno</summary> <content type="html"><div><p>test and develop the AudioDSP library for programming the pedalSHIELD Uno</p><img src="https://leap.tardate.com/playground/pedalshielduno/audiodsp/assets/audiodsp_build.jpg" /></div></content> <category term="DSP"/> <category term="Guitar"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioamps/guitarpracticeamp/</id> <link href="https://leap.tardate.com/audio/audioamps/guitarpracticeamp/"/> <g:image_link>https://leap.tardate.com/audio/audioamps/guitarpracticeamp/assets/guitarpracticeamp_build.jpg</g:image_link> <updated>2020-06-06T05:35:40Z</updated> <title>#249 TDA2050 Guitar Practice Amp</title> <summary>single-channel 10W guitar practice amplifier based on the TDA2050</summary> <content type="html"><div><p>single-channel 10W guitar practice amplifier based on the TDA2050</p><img src="https://leap.tardate.com/audio/audioamps/guitarpracticeamp/assets/guitarpracticeamp_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/piercegateoscillator/</id> <link href="https://leap.tardate.com/electronics101/oscillators/piercegateoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/piercegateoscillator/assets/piercegateoscillator_build.jpg</g:image_link> <updated>2019-03-23T04:20:19Z</updated> <title>#248 PierceGateOscillator</title> <summary>build and test a 4.27 MHz Pierce Gate Oscillator circuit using a 74LS14 schmitt inverter</summary> <content type="html"><div><p>build and test a 4.27 MHz Pierce Gate Oscillator circuit using a 74LS14 schmitt inverter</p><img src="https://leap.tardate.com/electronics101/oscillators/piercegateoscillator/assets/piercegateoscillator_build.jpg" /></div></content> <category term="Oscillators"/> <category term="Crystal"/> </entry> <entry> <id>https://leap.tardate.com/playground/pedalshielduno/</id> <link href="https://leap.tardate.com/playground/pedalshielduno/"/> <g:image_link>https://leap.tardate.com/playground/pedalshielduno/assets/pedalshielduno_build.jpg</g:image_link> <updated>2016-09-21T11:12:07Z</updated> <title>#247 pedalShieldUno</title> <summary>build and test a genuine pedalSHIELD UNO Arduino-based guitar effects pedal</summary> <content type="html"><div><p>build and test a genuine pedalSHIELD UNO Arduino-based guitar effects pedal</p><img src="https://leap.tardate.com/playground/pedalshielduno/assets/pedalshielduno_build.jpg" /></div></content> <category term="DSP"/> <category term="Guitar"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/cmososcillators/</id> <link href="https://leap.tardate.com/electronics101/oscillators/cmososcillators/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/cmososcillators/assets/cmososcillators_build.jpg</g:image_link> <updated>2019-04-17T13:05:46Z</updated> <title>#246 CMOS Oscillators</title> <summary>testing 4-pin CMOS oscillators - NCH060C, MCO-1510A</summary> <content type="html"><div><p>testing 4-pin CMOS oscillators - NCH060C, MCO-1510A</p><img src="https://leap.tardate.com/electronics101/oscillators/cmososcillators/assets/cmososcillators_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/generalcurvetracer/</id> <link href="https://leap.tardate.com/electronics101/generalcurvetracer/"/> <g:image_link>https://leap.tardate.com/electronics101/generalcurvetracer/assets/generalcurvetracer_build.jpg</g:image_link> <updated>2016-09-06T07:43:25Z</updated> <title>#245 GeneralCurveTracer</title> <summary>test a DC-powered general curve tracer circuit</summary> <content type="html"><div><p>test a DC-powered general curve tracer circuit</p><img src="https://leap.tardate.com/electronics101/generalcurvetracer/assets/generalcurvetracer_build.jpg" /></div></content> <category term="BJT"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/switches/dpdt/</id> <link href="https://leap.tardate.com/electronics101/switches/dpdt/"/> <g:image_link>https://leap.tardate.com/electronics101/switches/dpdt/assets/dpdt_build.jpg</g:image_link> <updated>2016-09-19T15:45:05Z</updated> <title>#244 Switches/DPDT</title> <summary>all about double-pole, double-throw (DPDT) toggle switches</summary> <content type="html"><div><p>all about double-pole, double-throw (DPDT) toggle switches</p><img src="https://leap.tardate.com/electronics101/switches/dpdt/assets/dpdt_build.jpg" /></div></content> <category term="Switches"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/switches/</id> <link href="https://leap.tardate.com/electronics101/switches/"/> <g:image_link>https://leap.tardate.com/electronics101/switches/assets/switches_build.jpg</g:image_link> <updated>2016-09-19T15:45:05Z</updated> <title>#243 Switches</title> <summary>Notes on miscellaneous mechanical switches used in electrical circuits</summary> <content type="html"><div><p>Notes on miscellaneous mechanical switches used in electrical circuits</p><img src="https://leap.tardate.com/electronics101/switches/assets/switches_build.jpg" /></div></content> <category term="Switches"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/pierceoscillator/</id> <link href="https://leap.tardate.com/electronics101/oscillators/pierceoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/pierceoscillator/assets/pierceoscillator_build.jpg</g:image_link> <updated>2019-03-23T04:20:19Z</updated> <title>#242 PierceOscillator</title> <summary>test a Pierce Oscillator made with a minimum of components</summary> <content type="html"><div><p>test a Pierce Oscillator made with a minimum of components</p><img src="https://leap.tardate.com/electronics101/oscillators/pierceoscillator/assets/pierceoscillator_build.jpg" /></div></content> <category term="Oscillators"/> <category term="Crystal"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioamps/generalpurpose358/</id> <link href="https://leap.tardate.com/audio/audioamps/generalpurpose358/"/> <g:image_link>https://leap.tardate.com/audio/audioamps/generalpurpose358/assets/generalpurpose358_build.jpg</g:image_link> <updated>2020-06-06T05:35:40Z</updated> <title>#241 General Purpose 358</title> <summary>test a general-purpose LM358 amplifier circuit</summary> <content type="html"><div><p>test a general-purpose LM358 amplifier circuit</p><img src="https://leap.tardate.com/audio/audioamps/generalpurpose358/assets/generalpurpose358_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/playground/digitalinputwithanalogpins/</id> <link href="https://leap.tardate.com/playground/digitalinputwithanalogpins/"/> <g:image_link>https://leap.tardate.com/playground/digitalinputwithanalogpins/assets/digitalinputwithanalogpins_build.jpg</g:image_link> <updated>2016-09-01T14:12:29Z</updated> <title>#240 DigitalInputWithAnalogPins</title> <summary>demonstrate how analog pins can also be used as a digital GPIO</summary> <content type="html"><div><p>demonstrate how analog pins can also be used as a digital GPIO</p><img src="https://leap.tardate.com/playground/digitalinputwithanalogpins/assets/digitalinputwithanalogpins_build.jpg" /></div></content> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/audiodsp/supercrunch/</id> <link href="https://leap.tardate.com/playground/audiodsp/supercrunch/"/> <g:image_link>https://leap.tardate.com/playground/audiodsp/supercrunch/assets/supercrunch_build.jpg</g:image_link> <updated>2016-08-28T05:23:51Z</updated> <title>#239 AudioDSP/SuperCrunch</title> <summary>arduino DSP crunchy symmetrical Schetzen distortion effect based on the pedalSHIELD by electrosmash</summary> <content type="html"><div><p>arduino DSP crunchy symmetrical Schetzen distortion effect based on the pedalSHIELD by electrosmash</p><img src="https://leap.tardate.com/playground/audiodsp/supercrunch/assets/supercrunch_build.jpg" /></div></content> <category term="Audio"/> <category term="Arduino"/> <category term="DSP"/> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/playground/audiodsp/crunch/</id> <link href="https://leap.tardate.com/playground/audiodsp/crunch/"/> <g:image_link>https://leap.tardate.com/playground/audiodsp/crunch/assets/crunch_build.jpg</g:image_link> <updated>2016-08-22T15:02:50Z</updated> <title>#238 AudioDSP/Crunch</title> <summary>arduino DSP crunchy distortion effect based on the pedalSHIELD by electrosmash</summary> <content type="html"><div><p>arduino DSP crunchy distortion effect based on the pedalSHIELD by electrosmash</p><img src="https://leap.tardate.com/playground/audiodsp/crunch/assets/crunch_build.jpg" /></div></content> <category term="Audio"/> <category term="Arduino"/> <category term="DSP"/> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/playground/audiodsp/distortion/</id> <link href="https://leap.tardate.com/playground/audiodsp/distortion/"/> <g:image_link>https://leap.tardate.com/playground/audiodsp/distortion/assets/distortion_build.jpg</g:image_link> <updated>2016-08-21T15:01:43Z</updated> <title>#237 AudioDSP/Distortion</title> <summary>arduino DSP simple distortion effect based on the pedalSHIELD by electrosmash</summary> <content type="html"><div><p>arduino DSP simple distortion effect based on the pedalSHIELD by electrosmash</p><img src="https://leap.tardate.com/playground/audiodsp/distortion/assets/distortion_build.jpg" /></div></content> <category term="Audio"/> <category term="Arduino"/> <category term="DSP"/> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/playground/audiodsp/boost/</id> <link href="https://leap.tardate.com/playground/audiodsp/boost/"/> <g:image_link>https://leap.tardate.com/playground/audiodsp/boost/assets/boost_build.jpg</g:image_link> <updated>2016-08-21T10:59:27Z</updated> <title>#236 AudioDSP/Boost</title> <summary>arduino DSP boost effect based on the pedalSHIELD by electrosmash</summary> <content type="html"><div><p>arduino DSP boost effect based on the pedalSHIELD by electrosmash</p><img src="https://leap.tardate.com/playground/audiodsp/boost/assets/boost_build.jpg" /></div></content> <category term="Audio"/> <category term="Arduino"/> <category term="DSP"/> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/playground/audiodsp/</id> <link href="https://leap.tardate.com/playground/audiodsp/"/> <g:image_link>https://leap.tardate.com/playground/audiodsp/assets/audiodsp_build.jpg</g:image_link> <updated>2016-08-20T10:38:44Z</updated> <title>#235 AudioDSP</title> <summary>build and test an arduino DSP circuit based on the pedalSHIELD by electrosmash</summary> <content type="html"><div><p>build and test an arduino DSP circuit based on the pedalSHIELD by electrosmash</p><img src="https://leap.tardate.com/playground/audiodsp/assets/audiodsp_build.jpg" /></div></content> <category term="Audio"/> <category term="Arduino"/> <category term="DSP"/> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/cmosinverteroscillator/</id> <link href="https://leap.tardate.com/electronics101/oscillators/cmosinverteroscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/cmosinverteroscillator/assets/cmosinverteroscillator_build.jpg</g:image_link> <updated>2022-09-16T13:35:07Z</updated> <title>#234 CMOS Inverter Oscillator</title> <summary>use a CD4096 to generate an oscillating waveform and plot the results</summary> <content type="html"><div><p>use a CD4096 to generate an oscillating waveform and plot the results</p><img src="https://leap.tardate.com/electronics101/oscillators/cmosinverteroscillator/assets/cmosinverteroscillator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/pwm/generalpurposehighsidecontroller/</id> <link href="https://leap.tardate.com/electronics101/pwm/generalpurposehighsidecontroller/"/> <g:image_link>https://leap.tardate.com/electronics101/pwm/generalpurposehighsidecontroller/assets/generalpurposehighsidecontroller_build.jpg</g:image_link> <updated>2016-08-11T16:02:26Z</updated> <title>#233 General Purpose High-Side Controller</title> <summary>build and test a general-purpose high-side PWM controller</summary> <content type="html"><div><p>build and test a general-purpose high-side PWM controller</p><img src="https://leap.tardate.com/electronics101/pwm/generalpurposehighsidecontroller/assets/generalpurposehighsidecontroller_build.jpg" /></div></content> <category term="PWM"/> <category term="555 Timer"/> <category term="Oscillators"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/dimmer/555pwm/</id> <link href="https://leap.tardate.com/electronics101/led/dimmer/555pwm/"/> <g:image_link>https://leap.tardate.com/electronics101/led/dimmer/555pwm/assets/555pwm_build.jpg</g:image_link> <updated>2023-09-14T10:19:20Z</updated> <title>#232 555 PWM LED Dimmer</title> <summary>test a PWM LED dimmer circuit using a 555 timer</summary> <content type="html"><div><p>test a PWM LED dimmer circuit using a 555 timer</p><img src="https://leap.tardate.com/electronics101/led/dimmer/555pwm/assets/555pwm_build.jpg" /></div></content> <category term="LED"/> <category term="Power"/> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/dimmer/currentregulator/</id> <link href="https://leap.tardate.com/electronics101/led/dimmer/currentregulator/"/> <g:image_link>https://leap.tardate.com/electronics101/led/dimmer/currentregulator/assets/currentregulator_build.jpg</g:image_link> <updated>2023-09-14T10:19:20Z</updated> <title>#231 LED Current Regulator</title> <summary>test a current-regulator style LED dimmer circuit</summary> <content type="html"><div><p>test a current-regulator style LED dimmer circuit</p><img src="https://leap.tardate.com/electronics101/led/dimmer/currentregulator/assets/currentregulator_build.jpg" /></div></content> <category term="LED"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/minimallcoscillator/</id> <link href="https://leap.tardate.com/electronics101/minimallcoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/minimallcoscillator/assets/minimallcoscillator_build.jpg</g:image_link> <updated>2016-08-06T06:43:28Z</updated> <title>#230 MinimalLCOscillator</title> <summary>test an LC oscillator of just 5 components</summary> <content type="html"><div><p>test an LC oscillator of just 5 components</p><img src="https://leap.tardate.com/electronics101/minimallcoscillator/assets/minimallcoscillator_build.jpg" /></div></content> <category term="LC"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/dice/</id> <link href="https://leap.tardate.com/electronics101/555timer/dice/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/dice/assets/dice_build.jpg</g:image_link> <updated>2016-07-25T16:52:01Z</updated> <title>#229 Dice</title> <summary>a 555/4017-based dice circuit with slow-down and auto power-off</summary> <content type="html"><div><p>a 555/4017-based dice circuit with slow-down and auto power-off</p><img src="https://leap.tardate.com/electronics101/555timer/dice/assets/dice_build.jpg" /></div></content> <category term="555 Timer"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/transistorcurvetracer/</id> <link href="https://leap.tardate.com/electronics101/transistorcurvetracer/"/> <g:image_link>https://leap.tardate.com/electronics101/transistorcurvetracer/assets/transistorcurvetracer_build.jpg</g:image_link> <updated>2016-06-19T04:39:39Z</updated> <title>#228 Transistor Curve Tracer</title> <summary>simple NPN transistor curve tracer using a Stair-step generator circuit</summary> <content type="html"><div><p>simple NPN transistor curve tracer using a Stair-step generator circuit</p><img src="https://leap.tardate.com/electronics101/transistorcurvetracer/assets/transistorcurvetracer_build.jpg" /></div></content> <category term="OpAmp"/> <category term="555 Timer"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/knightrider/</id> <link href="https://leap.tardate.com/electronics101/555timer/knightrider/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/knightrider/assets/knightrider_build.jpg</g:image_link> <updated>2021-11-23T11:14:19Z</updated> <title>#227 Knight Rider</title> <summary>the familiar Knight Rider LED circuit using a 555 and 4017</summary> <content type="html"><div><p>the familiar Knight Rider LED circuit using a 555 and 4017</p><img src="https://leap.tardate.com/electronics101/555timer/knightrider/assets/knightrider_build.jpg" /></div></content> <category term="555 Timer"/> <category term="CMOS/TTL"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/musicboxkit/</id> <link href="https://leap.tardate.com/electronics101/musicboxkit/"/> <g:image_link>https://leap.tardate.com/electronics101/musicboxkit/assets/musicboxkit_build.jpg</g:image_link> <updated>2016-07-02T11:18:24Z</updated> <title>#226 MusicBoxKit</title> <summary>build and test a Music Box kit, and run a demonstration under Arduino control</summary> <content type="html"><div><p>build and test a Music Box kit, and run a demonstration under Arduino control</p><img src="https://leap.tardate.com/electronics101/musicboxkit/assets/musicboxkit_build.jpg" /></div></content> <category term="Music"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/fq777-954/teardown/</id> <link href="https://leap.tardate.com/kinetics/fq777-954/teardown/"/> <g:image_link>https://leap.tardate.com/kinetics/fq777-954/teardown/assets/teardown_build.jpg</g:image_link> <updated>2018-07-08T04:38:55Z</updated> <title>#225 FQ777-954 Tear Down</title> <summary>teardown an FQ777-954 nano drone and figure out as much of the technical design as possible</summary> <content type="html"><div><p>teardown an FQ777-954 nano drone and figure out as much of the technical design as possible</p><img src="https://leap.tardate.com/kinetics/fq777-954/teardown/assets/teardown_build.jpg" /></div></content> <category term="Drones"/> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/ledstrobekit/</id> <link href="https://leap.tardate.com/electronics101/led/ledstrobekit/"/> <g:image_link>https://leap.tardate.com/electronics101/led/ledstrobekit/assets/ledstrobekit_build.jpg</g:image_link> <updated>2023-09-14T10:19:20Z</updated> <title>#224 LED Strobe Kit</title> <summary>build and analyse a common LED strobe kit</summary> <content type="html"><div><p>build and analyse a common LED strobe kit</p><img src="https://leap.tardate.com/electronics101/led/ledstrobekit/assets/ledstrobekit_build.jpg" /></div></content> <category term="LED"/> <category term="555 Timer"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/fritzingparts/</id> <link href="https://leap.tardate.com/fritzingparts/"/> <g:image_link>https://leap.tardate.com/fritzingparts/assets/fritzingparts_build.jpg</g:image_link> <updated>2016-06-20T13:45:57Z</updated> <title>#223 Fritzing Parts</title> <summary>my collection of custom Fritzing Parts</summary> <content type="html"><div><p>my collection of custom Fritzing Parts</p><img src="https://leap.tardate.com/fritzingparts/assets/fritzingparts_build.jpg" /></div></content> <category term="EDA"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/stairstepgenerator/</id> <link href="https://leap.tardate.com/electronics101/stairstepgenerator/"/> <g:image_link>https://leap.tardate.com/electronics101/stairstepgenerator/assets/stairstepgenerator_build.jpg</g:image_link> <updated>2016-06-19T04:39:39Z</updated> <title>#222 Stair-step Generator</title> <summary>generate a stair-step waveform with analog components</summary> <content type="html"><div><p>generate a stair-step waveform with analog components</p><img src="https://leap.tardate.com/electronics101/stairstepgenerator/assets/stairstepgenerator_build.jpg" /></div></content> <category term="OpAmp"/> <category term="555 Timer"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/resistortransistorlogic/xor/</id> <link href="https://leap.tardate.com/electronics101/resistortransistorlogic/xor/"/> <g:image_link>https://leap.tardate.com/electronics101/resistortransistorlogic/xor/assets/xor_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#221 XOR Gate with Resistor-Transistor Logic</title> <summary>test the basic resistor-transistor logic XOR gate/XOR</summary> <content type="html"><div><p>test the basic resistor-transistor logic XOR gate/XOR</p><img src="https://leap.tardate.com/electronics101/resistortransistorlogic/xor/assets/xor_build.jpg" /></div></content> <category term="BJT"/> <category term="RTL"/> <category term="Digital Logic"/> </entry> <entry> <id>https://leap.tardate.com/playground/gcctoolchain/</id> <link href="https://leap.tardate.com/playground/gcctoolchain/"/> <g:image_link>https://leap.tardate.com/playground/gcctoolchain/assets/gcctoolchain_build.jpg</g:image_link> <updated>2020-01-10T16:17:10Z</updated> <title>#220 AVR GCC Toolchain</title> <summary>programming an Arduino with C and a command line</summary> <content type="html"><div><p>programming an Arduino with C and a command line</p><img src="https://leap.tardate.com/playground/gcctoolchain/assets/gcctoolchain_build.jpg" /></div></content> <category term="AVR"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ds18s20/onewirereading/</id> <link href="https://leap.tardate.com/electronics101/ds18s20/onewirereading/"/> <g:image_link>https://leap.tardate.com/electronics101/ds18s20/onewirereading/assets/onewirereading_build.jpg</g:image_link> <updated>2021-03-09T14:31:51Z</updated> <title>#219 DS18S20 1-Wire Reading</title> <summary>basic interrogation of a DS18S20 using 1-wire protocol</summary> <content type="html"><div><p>basic interrogation of a DS18S20 using 1-wire protocol</p><img src="https://leap.tardate.com/electronics101/ds18s20/onewirereading/assets/onewirereading_build.jpg" /></div></content> <category term="Sensors"/> <category term="Arduino"/> <category term="DS18S20"/> </entry> <entry> <id>https://leap.tardate.com/playground/mpu6050/accelgyrotest/</id> <link href="https://leap.tardate.com/playground/mpu6050/accelgyrotest/"/> <g:image_link>https://leap.tardate.com/playground/mpu6050/accelgyrotest/assets/accelgyrotest_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#218 MPU6050/AccelGyroTest</title> <summary>first test of an Invensense MPU-6050 3-Axes Accelerometer Gyroscope Module</summary> <content type="html"><div><p>first test of an Invensense MPU-6050 3-Axes Accelerometer Gyroscope Module</p><img src="https://leap.tardate.com/playground/mpu6050/accelgyrotest/assets/accelgyrotest_build.jpg" /></div></content> <category term="Sensors"/> <category term="MPU-6050"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/basicbuckavrcontrol/</id> <link href="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/basicbuckavrcontrol/"/> <g:image_link>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/basicbuckavrcontrol/assets/basicbuckavrcontrol_build.jpg</g:image_link> <updated>2017-05-06T10:08:03Z</updated> <title>#217 Basic AVR-controlled Buck Converter</title> <summary>a simple buck converter circuit from first principles</summary> <content type="html"><div><p>a simple buck converter circuit from first principles</p><img src="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/basicbuckavrcontrol/assets/basicbuckavrcontrol_build.jpg" /></div></content> <category term="Power"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/oshchip/ledx16module/</id> <link href="https://leap.tardate.com/oshchip/ledx16module/"/> <g:image_link>https://leap.tardate.com/oshchip/ledx16module/assets/ledx16module_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#216 OSHChip LEDx16 Module</title> <summary>driving an SPI LED module with the OSHChip</summary> <content type="html"><div><p>driving an SPI LED module with the OSHChip</p><img src="https://leap.tardate.com/oshchip/ledx16module/assets/ledx16module_build.jpg" /></div></content> <category term="OSHChip"/> <category term="SPI"/> </entry> <entry> <id>https://leap.tardate.com/oshchip/yottatoolchain/</id> <link href="https://leap.tardate.com/oshchip/yottatoolchain/"/> <g:image_link>https://leap.tardate.com/oshchip/yottatoolchain/assets/yottatoolchain_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#215 OSHChip Yotta Toolchain</title> <summary>build a simple program using the Official Yotta target for OSHChip and gcc on MacOSX</summary> <content type="html"><div><p>build a simple program using the Official Yotta target for OSHChip and gcc on MacOSX</p><img src="https://leap.tardate.com/oshchip/yottatoolchain/assets/yottatoolchain_build.jpg" /></div></content> <category term="ARM"/> <category term="OSHChip"/> </entry> <entry> <id>https://leap.tardate.com/oshchip/gcctoolchain/</id> <link href="https://leap.tardate.com/oshchip/gcctoolchain/"/> <g:image_link>https://leap.tardate.com/oshchip/gcctoolchain/assets/gcctoolchain_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#214 OSHChip Gcc Toolchain</title> <summary>can I build a program for the OSHChip using the gcc toolchain and Nordic Semi SDK on MacOSX?</summary> <content type="html"><div><p>can I build a program for the OSHChip using the gcc toolchain and Nordic Semi SDK on MacOSX?</p><img src="https://leap.tardate.com/oshchip/gcctoolchain/assets/gcctoolchain_build.jpg" /></div></content> <category term="ARM"/> <category term="gcc"/> <category term="OSHChip"/> </entry> <entry> <id>https://leap.tardate.com/oshchip/blinky/</id> <link href="https://leap.tardate.com/oshchip/blinky/"/> <g:image_link>https://leap.tardate.com/oshchip/blinky/assets/blinky_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#213 OSHChip Blinky</title> <summary>first tests of the OSHChip nRF51822-CFAC-A0 in DIP16 packaging</summary> <content type="html"><div><p>first tests of the OSHChip nRF51822-CFAC-A0 in DIP16 packaging</p><img src="https://leap.tardate.com/oshchip/blinky/assets/blinky_build.jpg" /></div></content> <category term="ARM"/> <category term="OSHChip"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/staycreative/</id> <link href="https://leap.tardate.com/electronics101/staycreative/"/> <g:image_link>https://leap.tardate.com/electronics101/staycreative/assets/staycreative_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#212 StayCreative</title> <summary>an audio level VU meter driving a custom LED sign</summary> <content type="html"><div><p>an audio level VU meter driving a custom LED sign</p><img src="https://leap.tardate.com/electronics101/staycreative/assets/staycreative_build.jpg" /></div></content> <category term="Audio"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/buckconvertermodules/</id> <link href="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/buckconvertermodules/"/> <g:image_link>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/buckconvertermodules/assets/buckconvertermodules_build.jpg</g:image_link> <updated>2016-06-23T14:13:43Z</updated> <title>#211 Buck Converter Modules</title> <summary>Testing a range of low-cost buck converter modules, often using LM2596</summary> <content type="html"><div><p>Testing a range of low-cost buck converter modules, often using LM2596</p><img src="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/buckconvertermodules/assets/buckconvertermodules_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioamps/tda7297kit/</id> <link href="https://leap.tardate.com/audio/audioamps/tda7297kit/"/> <g:image_link>https://leap.tardate.com/audio/audioamps/tda7297kit/assets/tda7297kit_build.jpg</g:image_link> <updated>2020-06-06T05:35:40Z</updated> <title>#210 TDA7297 Audio Amp Kit</title> <summary>testing a TDA7297 audio amplifier kit (pump up the jam)</summary> <content type="html"><div><p>testing a TDA7297 audio amplifier kit (pump up the jam)</p><img src="https://leap.tardate.com/audio/audioamps/tda7297kit/assets/tda7297kit_build.jpg" /></div></content> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/playground/ledpaneldisplay72r02/</id> <link href="https://leap.tardate.com/playground/ledpaneldisplay72r02/"/> <g:image_link>https://leap.tardate.com/playground/ledpaneldisplay72r02/assets/ledpaneldisplay72r02_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#209 LedPanelDisplay72R02</title> <summary>test a 7-digit & 7-status indicator LED display</summary> <content type="html"><div><p>test a 7-digit &amp; 7-status indicator LED display</p><img src="https://leap.tardate.com/playground/ledpaneldisplay72r02/assets/ledpaneldisplay72r02_build.jpg" /></div></content> <category term="LED"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/radio/fm/singlestagetransmitterkit/</id> <link href="https://leap.tardate.com/radio/fm/singlestagetransmitterkit/"/> <g:image_link>https://leap.tardate.com/radio/fm/singlestagetransmitterkit/assets/singlestagetransmitterkit_build.jpg</g:image_link> <updated>2019-08-04T11:25:24Z</updated> <title>#208 Single-stage FM Transmitter Kit</title> <summary>build a simple single-stage FK702 FM Transmitter Kit by Future Kit</summary> <content type="html"><div><p>build a simple single-stage FK702 FM Transmitter Kit by Future Kit</p><img src="https://leap.tardate.com/radio/fm/singlestagetransmitterkit/assets/singlestagetransmitterkit_build.jpg" /></div></content> <category term="Radio"/> <category term="FM"/> <category term="Transmitter"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/frequencycounter/</id> <link href="https://leap.tardate.com/electronics101/frequencycounter/"/> <g:image_link>https://leap.tardate.com/electronics101/frequencycounter/assets/frequencycounter_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#207 FrequencyCounter</title> <summary>test a CMOS frequency counter circuit with 100Hz - 5MHz range</summary> <content type="html"><div><p>test a CMOS frequency counter circuit with 100Hz - 5MHz range</p><img src="https://leap.tardate.com/electronics101/frequencycounter/assets/frequencycounter_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/cd4047/astableoscillator/</id> <link href="https://leap.tardate.com/electronics101/cd4047/astableoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/cd4047/astableoscillator/assets/astableoscillator_build.jpg</g:image_link> <updated>2022-09-16T13:35:07Z</updated> <title>#206 CD4047 Astable Oscillator</title> <summary>test the astable operating mode of the CD4047</summary> <content type="html"><div><p>test the astable operating mode of the CD4047</p><img src="https://leap.tardate.com/electronics101/cd4047/astableoscillator/assets/astableoscillator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="CD4047"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/triacdimmer/</id> <link href="https://leap.tardate.com/electronics101/triacdimmer/"/> <g:image_link>https://leap.tardate.com/electronics101/triacdimmer/assets/triacdimmer_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#205 TriacDimmer</title> <summary>investigate the operation of triacs and build the basic dimmaer circuit</summary> <content type="html"><div><p>investigate the operation of triacs and build the basic dimmaer circuit</p><img src="https://leap.tardate.com/electronics101/triacdimmer/assets/triacdimmer_build.jpg" /></div></content> <category term="Triac"/> <category term="Thyristor"/> </entry> <entry> <id>https://leap.tardate.com/playground/temperatureloggertypek/</id> <link href="https://leap.tardate.com/playground/temperatureloggertypek/"/> <g:image_link>https://leap.tardate.com/playground/temperatureloggertypek/assets/temperatureloggertypek_build.jpg</g:image_link> <updated>2021-08-15T13:42:05Z</updated> <title>#204 Type K Temperature Logger</title> <summary>simple high-temperature monitor using Type K (differential) and LM35 (cold-junction) sensors</summary> <content type="html"><div><p>simple high-temperature monitor using Type K (differential) and LM35 (cold-junction) sensors</p><img src="https://leap.tardate.com/playground/temperatureloggertypek/assets/temperatureloggertypek_build.jpg" /></div></content> <category term="Sensors"/> <category term="Thermocouple"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/homopolarmotor/</id> <link href="https://leap.tardate.com/kinetics/homopolarmotor/"/> <g:image_link>https://leap.tardate.com/kinetics/homopolarmotor/assets/homopolarmotor_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#203 HomopolarMotor</title> <summary>build a basic homopolar motor</summary> <content type="html"><div><p>build a basic homopolar motor</p><img src="https://leap.tardate.com/kinetics/homopolarmotor/assets/homopolarmotor_build.jpg" /></div></content> <category term="Kinetics"/> </entry> <entry> <id>https://leap.tardate.com/audio/visualization/audiolevelindicatorkit/</id> <link href="https://leap.tardate.com/audio/visualization/audiolevelindicatorkit/"/> <g:image_link>https://leap.tardate.com/audio/visualization/audiolevelindicatorkit/assets/audiolevelindicatorkit_build.jpg</g:image_link> <updated>2022-09-03T11:05:51Z</updated> <title>#202 Audio Level Indicator Kit</title> <summary>an audio level indicator kit based on the LM3915</summary> <content type="html"><div><p>an audio level indicator kit based on the LM3915</p><img src="https://leap.tardate.com/audio/visualization/audiolevelindicatorkit/assets/audiolevelindicatorkit_build.jpg" /></div></content> <category term="LM3915"/> <category term="Audio"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/doorbellkit/</id> <link href="https://leap.tardate.com/electronics101/555timer/doorbellkit/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/doorbellkit/assets/doorbellkit_build.jpg</g:image_link> <updated>2019-09-07T08:50:36Z</updated> <title>#201 555 Timer Doorbell Kit</title> <summary>another two-tone doorbell using a 555 timer oscillator</summary> <content type="html"><div><p>another two-tone doorbell using a 555 timer oscillator</p><img src="https://leap.tardate.com/electronics101/555timer/doorbellkit/assets/doorbellkit_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/solenoids/solenoidmotor/</id> <link href="https://leap.tardate.com/kinetics/solenoids/solenoidmotor/"/> <g:image_link>https://leap.tardate.com/kinetics/solenoids/solenoidmotor/assets/solenoidmotor_build.jpg</g:image_link> <updated>2019-08-18T03:38:40Z</updated> <title>#200 Solenoid Motor</title> <summary>a single-cylinder mini-solenoid engine</summary> <content type="html"><div><p>a single-cylinder mini-solenoid engine</p><img src="https://leap.tardate.com/kinetics/solenoids/solenoidmotor/assets/solenoidmotor_build.jpg" /></div></content> <category term="Solenoid"/> </entry> <entry> <id>https://leap.tardate.com/playground/led7segment/cd4026bucketbrigade/</id> <link href="https://leap.tardate.com/playground/led7segment/cd4026bucketbrigade/"/> <g:image_link>https://leap.tardate.com/playground/led7segment/cd4026bucketbrigade/assets/cd4026bucketbrigade_build.jpg</g:image_link> <updated>2020-10-02T13:02:32Z</updated> <title>#199 7-Segment CD4026 Bucket-brigade</title> <summary>a CD4026 bucket-brigade for driving multiple 7-segment LED displays</summary> <content type="html"><div><p>a CD4026 bucket-brigade for driving multiple 7-segment LED displays</p><img src="https://leap.tardate.com/playground/led7segment/cd4026bucketbrigade/assets/cd4026bucketbrigade_build.jpg" /></div></content> <category term="LED"/> <category term="LED 7-Segment"/> <category term="CMOS/TTL"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/halleffectswitch/</id> <link href="https://leap.tardate.com/electronics101/halleffectswitch/"/> <g:image_link>https://leap.tardate.com/electronics101/halleffectswitch/assets/halleffectswitch_build.jpg</g:image_link> <updated>2019-08-18T03:27:41Z</updated> <title>#198 Hall Effect Switch</title> <summary>using a Hall effect switch (A3144)</summary> <content type="html"><div><p>using a Hall effect switch (A3144)</p><img src="https://leap.tardate.com/electronics101/halleffectswitch/assets/halleffectswitch_build.jpg" /></div></content> <category term="Sensors"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/wienbridgeaudiotonegenerator/</id> <link href="https://leap.tardate.com/electronics101/wienbridgeaudiotonegenerator/"/> <g:image_link>https://leap.tardate.com/electronics101/wienbridgeaudiotonegenerator/assets/wienbridgeaudiotonegenerator_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#197 WienBridgeAudioToneGenerator</title> <summary>fixed-frequency tone generator based on a Wien Bridge Oscillator</summary> <content type="html"><div><p>fixed-frequency tone generator based on a Wien Bridge Oscillator</p><img src="https://leap.tardate.com/electronics101/wienbridgeaudiotonegenerator/assets/wienbridgeaudiotonegenerator_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/playground/led7segment/cd4026drive/</id> <link href="https://leap.tardate.com/playground/led7segment/cd4026drive/"/> <g:image_link>https://leap.tardate.com/playground/led7segment/cd4026drive/assets/cd4026drive_build.jpg</g:image_link> <updated>2020-10-02T13:02:32Z</updated> <title>#196 7-Segment CD4026 Drive</title> <summary>driving a 7-segment LED display with CD4026 Counter</summary> <content type="html"><div><p>driving a 7-segment LED display with CD4026 Counter</p><img src="https://leap.tardate.com/playground/led7segment/cd4026drive/assets/cd4026drive_build.jpg" /></div></content> <category term="LED"/> <category term="LED 7-Segment"/> <category term="CMOS/TTL"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/lcresonator/</id> <link href="https://leap.tardate.com/electronics101/lcresonator/"/> <g:image_link>https://leap.tardate.com/electronics101/lcresonator/assets/lcresonator_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#195 LCResonator</title> <summary>measure the resonant frequency of an LC circuit or inductance of an inductor </summary> <content type="html"><div><p>measure the resonant frequency of an LC circuit or inductance of an inductor </p><img src="https://leap.tardate.com/electronics101/lcresonator/assets/lcresonator_build.jpg" /></div></content> <category term="Oscillators"/> <category term="LC"/> </entry> <entry> <id>https://leap.tardate.com/esp8266/diydevboard/</id> <link href="https://leap.tardate.com/esp8266/diydevboard/"/> <g:image_link>https://leap.tardate.com/esp8266/diydevboard/assets/diydevboard_build.jpg</g:image_link> <updated>2017-09-19T15:46:13Z</updated> <title>#194 ESP8266 DIY Devboard</title> <summary>a DIY devboard for an ESP-01 ESP8266</summary> <content type="html"><div><p>a DIY devboard for an ESP-01 ESP8266</p><img src="https://leap.tardate.com/esp8266/diydevboard/assets/diydevboard_build.jpg" /></div></content> <category term="ESP8266"/> </entry> <entry> <id>https://leap.tardate.com/8051/povshakestickkit/</id> <link href="https://leap.tardate.com/8051/povshakestickkit/"/> <g:image_link>https://leap.tardate.com/8051/povshakestickkit/assets/povshakestickkit_build.jpg</g:image_link> <updated>2023-03-27T13:57:21Z</updated> <title>#193 PoV Shake Stick Kit</title> <summary>build and investigate an AT89S52-based "shake stick" kit</summary> <content type="html"><div><p>build and investigate an AT89S52-based "shake stick" kit</p><img src="https://leap.tardate.com/8051/povshakestickkit/assets/povshakestickkit_build.jpg" /></div></content> <category term="8051"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/kraft/sagradafamilia/</id> <link href="https://leap.tardate.com/kraft/sagradafamilia/"/> <g:image_link>https://leap.tardate.com/kraft/sagradafamilia/assets/sagradafamilia_build.jpg</g:image_link> <updated>2019-04-22T12:07:30Z</updated> <title>#192 Sagrada Família</title> <summary>a paper model with some LED effects</summary> <content type="html"><div><p>a paper model with some LED effects</p><img src="https://leap.tardate.com/kraft/sagradafamilia/assets/sagradafamilia_build.jpg" /></div></content> <category term="LED"/> <category term="Craft"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/lowvoltageglowingleds/</id> <link href="https://leap.tardate.com/electronics101/lowvoltageglowingleds/"/> <g:image_link>https://leap.tardate.com/electronics101/lowvoltageglowingleds/assets/lowvoltageglowingleds_build.jpg</g:image_link> <updated>2019-09-07T08:50:36Z</updated> <title>#191 Low-voltage Glowing LEDs</title> <summary>a dual-LED "glowing" oscillator from a 1.5V supply</summary> <content type="html"><div><p>a dual-LED "glowing" oscillator from a 1.5V supply</p><img src="https://leap.tardate.com/electronics101/lowvoltageglowingleds/assets/lowvoltageglowingleds_build.jpg" /></div></content> <category term="BJT"/> <category term="LED"/> <category term="Oscillators"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/playground/multislavespi/</id> <link href="https://leap.tardate.com/playground/multislavespi/"/> <g:image_link>https://leap.tardate.com/playground/multislavespi/assets/multislavespi_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#190 MultiSlaveSPI</title> <summary>using SPI to control multiple devices that support an SPIish interface</summary> <content type="html"><div><p>using SPI to control multiple devices that support an SPIish interface</p><img src="https://leap.tardate.com/playground/multislavespi/assets/multislavespi_build.jpg" /></div></content> <category term="SPI"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/led7segment/shiftdrivespi/</id> <link href="https://leap.tardate.com/playground/led7segment/shiftdrivespi/"/> <g:image_link>https://leap.tardate.com/playground/led7segment/shiftdrivespi/assets/shiftdrivespi_build.jpg</g:image_link> <updated>2020-10-02T13:02:32Z</updated> <title>#189 7-Segment Shift Drive SPI</title> <summary>using SPI to control a 7-segment LED display via a 74HC595 shift register</summary> <content type="html"><div><p>using SPI to control a 7-segment LED display via a 74HC595 shift register</p><img src="https://leap.tardate.com/playground/led7segment/shiftdrivespi/assets/shiftdrivespi_build.jpg" /></div></content> <category term="LED"/> <category term="LED 7-Segment"/> <category term="CMOS/TTL"/> <category term="Arduino"/> <category term="SPI"/> </entry> <entry> <id>https://leap.tardate.com/playground/eeprom/at24c02/basicreadwrite/</id> <link href="https://leap.tardate.com/playground/eeprom/at24c02/basicreadwrite/"/> <g:image_link>https://leap.tardate.com/playground/eeprom/at24c02/basicreadwrite/assets/basicreadwrite_build.jpg</g:image_link> <updated>2020-10-02T13:02:32Z</updated> <title>#188 Basic AT24C02 EEPROM Read/Write</title> <summary>basic read/write operations to external EEPROM (AT24C02) with the Wire library</summary> <content type="html"><div><p>basic read/write operations to external EEPROM (AT24C02) with the Wire library</p><img src="https://leap.tardate.com/playground/eeprom/at24c02/basicreadwrite/assets/basicreadwrite_build.jpg" /></div></content> <category term="EEPROM"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/nrf24/pingpong/</id> <link href="https://leap.tardate.com/playground/nrf24/pingpong/"/> <g:image_link>https://leap.tardate.com/playground/nrf24/pingpong/assets/pingpong_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#187 nRF24/PingPong</title> <summary>two Arduino's entertaining themselves with a game of "ping pong" over nRF24L01+ 2.4GHz RF</summary> <content type="html"><div><p>two Arduino's entertaining themselves with a game of "ping pong" over nRF24L01+ 2.4GHz RF</p><img src="https://leap.tardate.com/playground/nrf24/pingpong/assets/pingpong_build.jpg" /></div></content> <category term="nRF24"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitallogic/asyncjkcounter/</id> <link href="https://leap.tardate.com/electronics101/digitallogic/asyncjkcounter/"/> <g:image_link>https://leap.tardate.com/electronics101/digitallogic/asyncjkcounter/assets/asyncjkcounter_build.jpg</g:image_link> <updated>2019-09-07T08:50:36Z</updated> <title>#186 Asynchronous JK Counter</title> <summary>an asynchronous 4-bit counter built with JK Flip-Flops</summary> <content type="html"><div><p>an asynchronous 4-bit counter built with JK Flip-Flops</p><img src="https://leap.tardate.com/electronics101/digitallogic/asyncjkcounter/assets/asyncjkcounter_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Digital Logic"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/stirlingenginehb13/</id> <link href="https://leap.tardate.com/kinetics/stirlingenginehb13/"/> <g:image_link>https://leap.tardate.com/kinetics/stirlingenginehb13/assets/stirlingenginehb13_build.jpg</g:image_link> <updated>2021-08-15T07:08:58Z</updated> <title>#185 HB13 Stirling Engine</title> <summary>building the Böhm Stirling-Technik HB13 Small Bonsai engine</summary> <content type="html"><div><p>building the Böhm Stirling-Technik HB13 Small Bonsai engine</p><img src="https://leap.tardate.com/kinetics/stirlingenginehb13/assets/stirlingenginehb13_build.jpg" /></div></content> <category term="Kinetics"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/adjustablepulsegenerator/</id> <link href="https://leap.tardate.com/electronics101/555timer/adjustablepulsegenerator/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/adjustablepulsegenerator/assets/adjustablepulsegenerator_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#184 Adjustable Pulse Generator</title> <summary>widely-adjustable square wave generator using the 555 timer</summary> <content type="html"><div><p>widely-adjustable square wave generator using the 555 timer</p><img src="https://leap.tardate.com/electronics101/555timer/adjustablepulsegenerator/assets/adjustablepulsegenerator_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/polaritytester/</id> <link href="https://leap.tardate.com/electronics101/polaritytester/"/> <g:image_link>https://leap.tardate.com/electronics101/polaritytester/assets/polaritytester_build.jpg</g:image_link> <updated>2022-05-24T04:49:42Z</updated> <title>#183 Polarity Tester</title> <summary>Demonstrate a polarity-testing circuit using the CD4069 inverter</summary> <content type="html"><div><p>Demonstrate a polarity-testing circuit using the CD4069 inverter</p><img src="https://leap.tardate.com/electronics101/polaritytester/assets/polaritytester_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="CD4069"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/powersupply317kit/</id> <link href="https://leap.tardate.com/electronics101/power/powersupply317kit/"/> <g:image_link>https://leap.tardate.com/electronics101/power/powersupply317kit/assets/powersupply317kit_build.jpg</g:image_link> <updated>2024-04-10T06:05:34Z</updated> <title>#182 LM317 Variable Power Supply Kit</title> <summary>build and test a mains-powered 1.25V-12V DC LM317 power supply kit</summary> <content type="html"><div><p>build and test a mains-powered 1.25V-12V DC LM317 power supply kit</p><img src="https://leap.tardate.com/electronics101/power/powersupply317kit/assets/powersupply317kit_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/meters/voltmetermodule/</id> <link href="https://leap.tardate.com/electronics101/meters/voltmetermodule/"/> <g:image_link>https://leap.tardate.com/electronics101/meters/voltmetermodule/assets/voltmetermodule_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#181 DC Voltmeter Modules</title> <summary>Testing a selection of 2 and 3-wire DC voltmeter modules</summary> <content type="html"><div><p>Testing a selection of 2 and 3-wire DC voltmeter modules</p><img src="https://leap.tardate.com/electronics101/meters/voltmetermodule/assets/voltmetermodule_build.jpg" /></div></content> <category term="Sensors"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/colpitts/</id> <link href="https://leap.tardate.com/electronics101/oscillators/colpitts/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/colpitts/assets/colpitts_build.jpg</g:image_link> <updated>2018-10-07T15:44:30Z</updated> <title>#180 ColpittsOscillator</title> <summary>testing a basic Colpitts Oscillator circuit</summary> <content type="html"><div><p>testing a basic Colpitts Oscillator circuit</p><img src="https://leap.tardate.com/electronics101/oscillators/colpitts/assets/colpitts_build.jpg" /></div></content> <category term="LC"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/playground/ledx16module/</id> <link href="https://leap.tardate.com/playground/ledx16module/"/> <g:image_link>https://leap.tardate.com/playground/ledx16module/assets/ledx16module_build.jpg</g:image_link> <updated>2017-05-24T15:39:45Z</updated> <title>#179 LEDx16Module</title> <summary>a custom 16 LED SMD PCB with 74HC595 shift register interface</summary> <content type="html"><div><p>a custom 16 LED SMD PCB with 74HC595 shift register interface</p><img src="https://leap.tardate.com/playground/ledx16module/assets/ledx16module_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="SMD"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/led7segment/shiftdrivemodule/</id> <link href="https://leap.tardate.com/playground/led7segment/shiftdrivemodule/"/> <g:image_link>https://leap.tardate.com/playground/led7segment/shiftdrivemodule/assets/shiftdrivemodule_build.jpg</g:image_link> <updated>2020-10-02T13:02:32Z</updated> <title>#178 7-Segment Shift Drive Module</title> <summary>a custom 7-segment LED display module PCB with 74HC595 shift register interface</summary> <content type="html"><div><p>a custom 7-segment LED display module PCB with 74HC595 shift register interface</p><img src="https://leap.tardate.com/playground/led7segment/shiftdrivemodule/assets/shiftdrivemodule_build.jpg" /></div></content> <category term="LED 7-Segment"/> <category term="CMOS/TTL"/> <category term="Arduino"/> <category term="PCB"/> </entry> <entry> <id>https://leap.tardate.com/playground/led7segment/shiftdrive/</id> <link href="https://leap.tardate.com/playground/led7segment/shiftdrive/"/> <g:image_link>https://leap.tardate.com/playground/led7segment/shiftdrive/assets/shiftdrive_build.jpg</g:image_link> <updated>2020-10-02T13:02:32Z</updated> <title>#177 7-Segment Shift Drive</title> <summary>test control of a 7-segment LED display via a 74HC595 shift register</summary> <content type="html"><div><p>test control of a 7-segment LED display via a 74HC595 shift register</p><img src="https://leap.tardate.com/playground/led7segment/shiftdrive/assets/shiftdrive_build.jpg" /></div></content> <category term="LED"/> <category term="LED 7-Segment"/> <category term="CMOS/TTL"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/nrf24breakout/</id> <link href="https://leap.tardate.com/electronics101/nrf24breakout/"/> <g:image_link>https://leap.tardate.com/electronics101/nrf24breakout/assets/nrf24breakout_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#176 nRF24Breakout</title> <summary>a simple PCB breadboard adapter for 8-pin nRF24 modules</summary> <content type="html"><div><p>a simple PCB breadboard adapter for 8-pin nRF24 modules</p><img src="https://leap.tardate.com/electronics101/nrf24breakout/assets/nrf24breakout_build.jpg" /></div></content> <category term="nRF24"/> <category term="PCB"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/switchsoftlatch/</id> <link href="https://leap.tardate.com/electronics101/switchsoftlatch/"/> <g:image_link>https://leap.tardate.com/electronics101/switchsoftlatch/assets/switchsoftlatch_build.jpg</g:image_link> <updated>2023-02-07T09:31:38Z</updated> <title>#175 Soft-latch Switch</title> <summary>Test a soft-latching power switching circuit based on a p-channel MOSFET</summary> <content type="html"><div><p>Test a soft-latching power switching circuit based on a p-channel MOSFET</p><img src="https://leap.tardate.com/electronics101/switchsoftlatch/assets/switchsoftlatch_build.jpg" /></div></content> <category term="MOSFET"/> <category term="BJT"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/usbnotifier/</id> <link href="https://leap.tardate.com/electronics101/usbnotifier/"/> <g:image_link>https://leap.tardate.com/electronics101/usbnotifier/assets/usbnotifier_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#174 USB Notifier</title> <summary>tear-down and demo code for some oldUSB Webmail Notifier devices</summary> <content type="html"><div><p>tear-down and demo code for some oldUSB Webmail Notifier devices</p><img src="https://leap.tardate.com/electronics101/usbnotifier/assets/usbnotifier_build.jpg" /></div></content> <category term="LED"/> <category term="USB"/> </entry> <entry> <id>https://leap.tardate.com/playground/ledcubes/mini4/</id> <link href="https://leap.tardate.com/playground/ledcubes/mini4/"/> <g:image_link>https://leap.tardate.com/playground/ledcubes/mini4/assets/mini4_build.jpg</g:image_link> <updated>2017-05-24T15:39:45Z</updated> <title>#173 LEDCubes/Mini4</title> <summary>a mini 64 LED cube with an Atmel328 and 3 x 74HC595 register interface</summary> <content type="html"><div><p>a mini 64 LED cube with an Atmel328 and 3 x 74HC595 register interface</p><img src="https://leap.tardate.com/playground/ledcubes/mini4/assets/mini4_build.jpg" /></div></content> <category term="LED"/> <category term="CMOS/TTL"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/scrlatch/</id> <link href="https://leap.tardate.com/electronics101/scrlatch/"/> <g:image_link>https://leap.tardate.com/electronics101/scrlatch/assets/scrlatch_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#172 SCRLatch</title> <summary>exploring the behaviour of low-power silicon controlled rectifiers (SCR)</summary> <content type="html"><div><p>exploring the behaviour of low-power silicon controlled rectifiers (SCR)</p><img src="https://leap.tardate.com/electronics101/scrlatch/assets/scrlatch_build.jpg" /></div></content> <category term="SCR"/> <category term="Thyristor"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/smdpracticeboards/</id> <link href="https://leap.tardate.com/electronics101/smdpracticeboards/"/> <g:image_link>https://leap.tardate.com/electronics101/smdpracticeboards/assets/smdpracticeboards_build.jpg</g:image_link> <updated>2022-01-20T14:40:39Z</updated> <title>#171 SMD Practice Boards</title> <summary>a collection of notes, kits and resources for hand-soldering surface mount devices</summary> <content type="html"><div><p>a collection of notes, kits and resources for hand-soldering surface mount devices</p><img src="https://leap.tardate.com/electronics101/smdpracticeboards/assets/smdpracticeboards_build.jpg" /></div></content> <category term="SMD"/> <category term="CMOS/TTL"/> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/clapswitchkit/</id> <link href="https://leap.tardate.com/electronics101/clapswitchkit/"/> <g:image_link>https://leap.tardate.com/electronics101/clapswitchkit/assets/clapswitchkit_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#170 Clap-switch Kit</title> <summary>build and analyse a simple clap switch circuit available as a kit</summary> <content type="html"><div><p>build and analyse a simple clap switch circuit available as a kit</p><img src="https://leap.tardate.com/electronics101/clapswitchkit/assets/clapswitchkit_build.jpg" /></div></content> <category term="Oscillators"/> <category term="BJT"/> <category term="Digital Logic"/> </entry> <entry> <id>https://leap.tardate.com/playground/rgbledmodule/</id> <link href="https://leap.tardate.com/playground/rgbledmodule/"/> <g:image_link>https://leap.tardate.com/playground/rgbledmodule/assets/rgbledmodule_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#169 RGB LED Module</title> <summary>demo an RGB LED module</summary> <content type="html"><div><p>demo an RGB LED module</p><img src="https://leap.tardate.com/playground/rgbledmodule/assets/rgbledmodule_build.jpg" /></div></content> <category term="LED"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/currentsensormodule/</id> <link href="https://leap.tardate.com/playground/currentsensormodule/"/> <g:image_link>https://leap.tardate.com/playground/currentsensormodule/assets/currentsensormodule_build.jpg</g:image_link> <updated>2017-12-31T04:01:08Z</updated> <title>#168 CurrentSensorModule</title> <summary>test an ACS712 current sensor module with display on a 5110 LCD</summary> <content type="html"><div><p>test an ACS712 current sensor module with display on a 5110 LCD</p><img src="https://leap.tardate.com/playground/currentsensormodule/assets/currentsensormodule_build.jpg" /></div></content> <category term="Sensors"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/voltagesensormodule/</id> <link href="https://leap.tardate.com/playground/voltagesensormodule/"/> <g:image_link>https://leap.tardate.com/playground/voltagesensormodule/assets/voltagesensormodule_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#167 VoltageSensorModule</title> <summary>test a 25V voltage sensor module with display on a 5110 LCD</summary> <content type="html"><div><p>test a 25V voltage sensor module with display on a 5110 LCD</p><img src="https://leap.tardate.com/playground/voltagesensormodule/assets/voltagesensormodule_build.jpg" /></div></content> <category term="Sensors"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/ds3231rtc/timedemo/</id> <link href="https://leap.tardate.com/playground/ds3231rtc/timedemo/"/> <g:image_link>https://leap.tardate.com/playground/ds3231rtc/timedemo/assets/timedemo_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#166 DS3231RTC/TimeDemo</title> <summary>prints the system time synced from the RTC to the serial output</summary> <content type="html"><div><p>prints the system time synced from the RTC to the serial output</p><img src="https://leap.tardate.com/playground/ds3231rtc/timedemo/assets/timedemo_build.jpg" /></div></content> <category term="RTC"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/lm2662inverter/</id> <link href="https://leap.tardate.com/electronics101/power/lm2662inverter/"/> <g:image_link>https://leap.tardate.com/electronics101/power/lm2662inverter/assets/lm2662inverter_build.jpg</g:image_link> <updated>2024-04-10T06:10:50Z</updated> <title>#165 LM2662 Inverter</title> <summary>test a negative 5V power supply using the LM2662 Switched Capacitor Voltage Converter</summary> <content type="html"><div><p>test a negative 5V power supply using the LM2662 Switched Capacitor Voltage Converter</p><img src="https://leap.tardate.com/electronics101/power/lm2662inverter/assets/lm2662inverter_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/watsonledring/</id> <link href="https://leap.tardate.com/electronics101/oscillators/watsonledring/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/watsonledring/assets/watsonledring_build.jpg</g:image_link> <updated>2022-12-23T09:30:56Z</updated> <title>#164 Watson LED Ring</title> <summary>test a Watson 3-LED Ring oscillator</summary> <content type="html"><div><p>test a Watson 3-LED Ring oscillator</p><img src="https://leap.tardate.com/electronics101/oscillators/watsonledring/assets/watsonledring_build.jpg" /></div></content> <category term="Oscillators"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/variablesawtoothgenerator/</id> <link href="https://leap.tardate.com/electronics101/variablesawtoothgenerator/"/> <g:image_link>https://leap.tardate.com/electronics101/variablesawtoothgenerator/assets/variablesawtoothgenerator_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#163 Variable Sawtooth Generator</title> <summary>test a variable-geometry, fixed-amplitude sawtooth wave generator circuit</summary> <content type="html"><div><p>test a variable-geometry, fixed-amplitude sawtooth wave generator circuit</p><img src="https://leap.tardate.com/electronics101/variablesawtoothgenerator/assets/variablesawtoothgenerator_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/boostbuckconvertermodule/</id> <link href="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/boostbuckconvertermodule/"/> <g:image_link>https://leap.tardate.com/electronics101/power/switchmodepowersupplies/boostbuckconvertermodule/assets/boostbuckconvertermodule_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#162 Boost-Buck Converter Module</title> <summary>quick test of an LM2577S/LM2596S Boost/Buck Converter Module</summary> <content type="html"><div><p>quick test of an LM2577S/LM2596S Boost/Buck Converter Module</p><img src="https://leap.tardate.com/electronics101/power/switchmodepowersupplies/boostbuckconvertermodule/assets/boostbuckconvertermodule_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ml741/noninvertingamplifier/</id> <link href="https://leap.tardate.com/electronics101/ml741/noninvertingamplifier/"/> <g:image_link>https://leap.tardate.com/electronics101/ml741/noninvertingamplifier/assets/noninvertingamplifier_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#161 ML741/NonInvertingAmplifier</title> <summary>test a non-inverting amplifier circuit using the ML741 discrete component opamp</summary> <content type="html"><div><p>test a non-inverting amplifier circuit using the ML741 discrete component opamp</p><img src="https://leap.tardate.com/electronics101/ml741/noninvertingamplifier/assets/noninvertingamplifier_build.jpg" /></div></content> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/lm324/splitterbuffer/</id> <link href="https://leap.tardate.com/electronics101/lm324/splitterbuffer/"/> <g:image_link>https://leap.tardate.com/electronics101/lm324/splitterbuffer/assets/splitterbuffer_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#160 LM324 Splitter Buffer</title> <summary>demonstrate load-independence of an LM324 buffer and signal splitter</summary> <content type="html"><div><p>demonstrate load-independence of an LM324 buffer and signal splitter</p><img src="https://leap.tardate.com/electronics101/lm324/splitterbuffer/assets/splitterbuffer_build.jpg" /></div></content> <category term="OpAmp"/> <category term="LM324"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ml741/invertingamplifier/</id> <link href="https://leap.tardate.com/electronics101/ml741/invertingamplifier/"/> <g:image_link>https://leap.tardate.com/electronics101/ml741/invertingamplifier/assets/invertingamplifier_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#159 ML741/InvertingAmplifier</title> <summary>test an inverting amplifier circuit using the ML741 discrete component opamp</summary> <content type="html"><div><p>test an inverting amplifier circuit using the ML741 discrete component opamp</p><img src="https://leap.tardate.com/electronics101/ml741/invertingamplifier/assets/invertingamplifier_build.jpg" /></div></content> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ml741/inverter/</id> <link href="https://leap.tardate.com/electronics101/ml741/inverter/"/> <g:image_link>https://leap.tardate.com/electronics101/ml741/inverter/assets/inverter_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#158 ML741/Inverter</title> <summary>test an inverter circuit using the ML741 discrete component opamp</summary> <content type="html"><div><p>test an inverter circuit using the ML741 discrete component opamp</p><img src="https://leap.tardate.com/electronics101/ml741/inverter/assets/inverter_build.jpg" /></div></content> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ml741/voltagefollower/</id> <link href="https://leap.tardate.com/electronics101/ml741/voltagefollower/"/> <g:image_link>https://leap.tardate.com/electronics101/ml741/voltagefollower/assets/voltagefollower_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#157 ML741/VoltageFollower</title> <summary>test a voltage follower/buffer circuit with the ML741 discrete component opamp</summary> <content type="html"><div><p>test a voltage follower/buffer circuit with the ML741 discrete component opamp</p><img src="https://leap.tardate.com/electronics101/ml741/voltagefollower/assets/voltagefollower_build.jpg" /></div></content> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/equipment/mso5074fg_unboxing/</id> <link href="https://leap.tardate.com/equipment/mso5074fg_unboxing/"/> <g:image_link>https://leap.tardate.com/equipment/mso5074fg_unboxing/assets/mso5074fg_unboxing_build.jpg</g:image_link> <updated>2016-10-22T13:39:15Z</updated> <title>#156 MSO5074FG Unboxing</title> <summary>unboxing and first tests of a Hantek MSO5074FG oscilloscope</summary> <content type="html"><div><p>unboxing and first tests of a Hantek MSO5074FG oscilloscope</p><img src="https://leap.tardate.com/equipment/mso5074fg_unboxing/assets/mso5074fg_unboxing_build.jpg" /></div></content> <category term="Tools"/> <category term="Test Equipment"/> <category term="Oscilloscope"/> </entry> <entry> <id>https://leap.tardate.com/esp8266/serialtest/ruby/</id> <link href="https://leap.tardate.com/esp8266/serialtest/ruby/"/> <g:image_link>https://leap.tardate.com/esp8266/serialtest/ruby/assets/ruby_build.jpg</g:image_link> <updated>2017-09-19T15:46:13Z</updated> <title>#155 ESP8266 SerialTest (ruby)</title> <summary>exercising ESP8266 serial communications with Ruby</summary> <content type="html"><div><p>exercising ESP8266 serial communications with Ruby</p><img src="https://leap.tardate.com/esp8266/serialtest/ruby/assets/ruby_build.jpg" /></div></content> <category term="ESP8266"/> <category term="Ruby"/> </entry> <entry> <id>https://leap.tardate.com/esp8266/serialtest/</id> <link href="https://leap.tardate.com/esp8266/serialtest/"/> <g:image_link>https://leap.tardate.com/esp8266/serialtest/assets/serialtest_build.jpg</g:image_link> <updated>2017-09-19T15:46:13Z</updated> <title>#154 ESP8266 SerialTest</title> <summary>first test of an ESP8266 module - serial communication to the SoC</summary> <content type="html"><div><p>first test of an ESP8266 module - serial communication to the SoC</p><img src="https://leap.tardate.com/esp8266/serialtest/assets/serialtest_build.jpg" /></div></content> <category term="ESP8266"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/linearregulators/ams1117/</id> <link href="https://leap.tardate.com/electronics101/power/linearregulators/ams1117/"/> <g:image_link>https://leap.tardate.com/electronics101/power/linearregulators/ams1117/assets/ams1117_build.jpg</g:image_link> <updated>2021-07-20T17:12:56Z</updated> <title>#153 AMS1117 Regulator</title> <summary>test an AMS1117 3.3V linear regulator</summary> <content type="html"><div><p>test an AMS1117 3.3V linear regulator</p><img src="https://leap.tardate.com/electronics101/power/linearregulators/ams1117/assets/ams1117_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/linearregulators/ld1117/</id> <link href="https://leap.tardate.com/electronics101/power/linearregulators/ld1117/"/> <g:image_link>https://leap.tardate.com/electronics101/power/linearregulators/ld1117/assets/ld1117_build.jpg</g:image_link> <updated>2021-07-20T17:12:56Z</updated> <title>#152 LD1117 Regulator</title> <summary>test an LD1117 3.3V linear regulator</summary> <content type="html"><div><p>test an LD1117 3.3V linear regulator</p><img src="https://leap.tardate.com/electronics101/power/linearregulators/ld1117/assets/ld1117_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ml741/comparator/</id> <link href="https://leap.tardate.com/electronics101/ml741/comparator/"/> <g:image_link>https://leap.tardate.com/electronics101/ml741/comparator/assets/comparator_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#151 ML741/Comparator</title> <summary>test a comparator circuit with the ML741 discrete component opamp</summary> <content type="html"><div><p>test a comparator circuit with the ML741 discrete component opamp</p><img src="https://leap.tardate.com/electronics101/ml741/comparator/assets/comparator_build.jpg" /></div></content> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ml741/</id> <link href="https://leap.tardate.com/electronics101/ml741/"/> <g:image_link>https://leap.tardate.com/electronics101/ml741/assets/ml741_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#150 ML741</title> <summary>an LM741-style OpAmp built with discrete components</summary> <content type="html"><div><p>an LM741-style OpAmp built with discrete components</p><img src="https://leap.tardate.com/electronics101/ml741/assets/ml741_build.jpg" /></div></content> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/playground/lcd5110/juliansu8glibdemo/</id> <link href="https://leap.tardate.com/playground/lcd5110/juliansu8glibdemo/"/> <g:image_link>https://leap.tardate.com/playground/lcd5110/juliansu8glibdemo/assets/juliansu8glibdemo_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#149 Lcd5110/JuliansU8glibDemo</title> <summary>quick test drive of Julian Ilett's 5110 LCD demo with the u8glib library</summary> <content type="html"><div><p>quick test drive of Julian Ilett's 5110 LCD demo with the u8glib library</p><img src="https://leap.tardate.com/playground/lcd5110/juliansu8glibdemo/assets/juliansu8glibdemo_build.jpg" /></div></content> <category term="LCD"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/ad9833/basicdemocycle/</id> <link href="https://leap.tardate.com/playground/ad9833/basicdemocycle/"/> <g:image_link>https://leap.tardate.com/playground/ad9833/basicdemocycle/assets/basicdemocycle_build.jpg</g:image_link> <updated>2022-12-18T01:02:41Z</updated> <title>#148 AD9833 Basic Demo Cycle</title> <summary>run a basic waveform demo with an AD9833 module</summary> <content type="html"><div><p>run a basic waveform demo with an AD9833 module</p><img src="https://leap.tardate.com/playground/ad9833/basicdemocycle/assets/basicdemocycle_build.jpg" /></div></content> <category term="Arduino"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/voltagedoublerchargepump/</id> <link href="https://leap.tardate.com/electronics101/555timer/voltagedoublerchargepump/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/voltagedoublerchargepump/assets/voltagedoublerchargepump_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#147 555 Voltage Doubler Charge Pump</title> <summary>test a voltage-doubling charge pump circuit based on a 555 timer</summary> <content type="html"><div><p>test a voltage-doubling charge pump circuit based on a 555 timer</p><img src="https://leap.tardate.com/electronics101/555timer/voltagedoublerchargepump/assets/voltagedoublerchargepump_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/invertingchargepump/</id> <link href="https://leap.tardate.com/electronics101/555timer/invertingchargepump/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/invertingchargepump/assets/invertingchargepump_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#146 Inverting Charge Pump</title> <summary>test an inverting charge pump circuit based on a 555 timer</summary> <content type="html"><div><p>test an inverting charge pump circuit based on a 555 timer</p><img src="https://leap.tardate.com/electronics101/555timer/invertingchargepump/assets/invertingchargepump_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/variabledutycycle/</id> <link href="https://leap.tardate.com/electronics101/555timer/variabledutycycle/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/variabledutycycle/assets/variabledutycycle_build.jpg</g:image_link> <updated>2019-09-07T08:50:36Z</updated> <title>#145 Variable Duty-Cycle 555 Timer</title> <summary>a 555 oscillator circuit that allows easy manual duty cycle adjustment while minimising the change to frequency</summary> <content type="html"><div><p>a 555 oscillator circuit that allows easy manual duty cycle adjustment while minimising the change to frequency</p><img src="https://leap.tardate.com/electronics101/555timer/variabledutycycle/assets/variabledutycycle_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/ringoscillator/</id> <link href="https://leap.tardate.com/electronics101/oscillators/ringoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/ringoscillator/assets/ringoscillator_build.jpg</g:image_link> <updated>2024-04-10T06:17:55Z</updated> <title>#144 Ring Oscillator</title> <summary>test a ring oscillator built with a 74LS14 Inverter chip</summary> <content type="html"><div><p>test a ring oscillator built with a 74LS14 Inverter chip</p><img src="https://leap.tardate.com/electronics101/oscillators/ringoscillator/assets/ringoscillator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/radio/am/opamptransmitter/</id> <link href="https://leap.tardate.com/radio/am/opamptransmitter/"/> <g:image_link>https://leap.tardate.com/radio/am/opamptransmitter/assets/opamptransmitter_build.jpg</g:image_link> <updated>2019-04-05T15:34:36Z</updated> <title>#143 OpAmp AM Transmitter</title> <summary>simple AM transmitter with OpAmp carrier/mixer</summary> <content type="html"><div><p>simple AM transmitter with OpAmp carrier/mixer</p><img src="https://leap.tardate.com/radio/am/opamptransmitter/assets/opamptransmitter_build.jpg" /></div></content> <category term="Radio"/> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/highfrequencyopamposcillators/</id> <link href="https://leap.tardate.com/electronics101/oscillators/highfrequencyopamposcillators/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/highfrequencyopamposcillators/assets/highfrequencyopamposcillators_build.jpg</g:image_link> <updated>2024-04-10T06:20:22Z</updated> <title>#142 High-frequency OpAmp Oscillators</title> <summary>how fast can you push an Op-Amp oscillator?</summary> <content type="html"><div><p>how fast can you push an Op-Amp oscillator?</p><img src="https://leap.tardate.com/electronics101/oscillators/highfrequencyopamposcillators/assets/highfrequencyopamposcillators_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/crystaltester/</id> <link href="https://leap.tardate.com/electronics101/crystaltester/"/> <g:image_link>https://leap.tardate.com/electronics101/crystaltester/assets/crystaltester_build.jpg</g:image_link> <updated>2018-07-08T04:38:55Z</updated> <title>#141 CrystalTester</title> <summary>a Colpitts Oscillator circuit for testing crystal oscillators with a frequency counter</summary> <content type="html"><div><p>a Colpitts Oscillator circuit for testing crystal oscillators with a frequency counter</p><img src="https://leap.tardate.com/electronics101/crystaltester/assets/crystaltester_build.jpg" /></div></content> <category term="Radio"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioeffects/zenermodeeffects/</id> <link href="https://leap.tardate.com/audio/audioeffects/zenermodeeffects/"/> <g:image_link>https://leap.tardate.com/audio/audioeffects/zenermodeeffects/assets/zenermodeeffects_build.jpg</g:image_link> <updated>2020-06-06T05:35:40Z</updated> <title>#140 BJT Zener-Mode Effects</title> <summary>playing around with some zener-mode sound effects</summary> <content type="html"><div><p>playing around with some zener-mode sound effects</p><img src="https://leap.tardate.com/audio/audioeffects/zenermodeeffects/assets/zenermodeeffects_build.jpg" /></div></content> <category term="Audio"/> <category term="BJT"/> <category term="Zener"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/playground/analogcomparator/</id> <link href="https://leap.tardate.com/playground/analogcomparator/"/> <g:image_link>https://leap.tardate.com/playground/analogcomparator/assets/analogcomparator_build.jpg</g:image_link> <updated>2021-09-16T18:14:44Z</updated> <title>#139 Analog Comparator</title> <summary>test the Atmega328 built-in analog comparator</summary> <content type="html"><div><p>test the Atmega328 built-in analog comparator</p><img src="https://leap.tardate.com/playground/analogcomparator/assets/analogcomparator_build.jpg" /></div></content> <category term="Arduino"/> <category term="Sensors"/> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/bjt/monostable/</id> <link href="https://leap.tardate.com/electronics101/bjt/monostable/"/> <g:image_link>https://leap.tardate.com/electronics101/bjt/monostable/assets/monostable_build.jpg</g:image_link> <updated>2018-02-12T12:07:29Z</updated> <title>#138 BJT Monostable</title> <summary>test a 2-transistor monostable multivibrator</summary> <content type="html"><div><p>test a 2-transistor monostable multivibrator</p><img src="https://leap.tardate.com/electronics101/bjt/monostable/assets/monostable_build.jpg" /></div></content> <category term="BJT"/> <category term="RC"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/toroidjoulethief/</id> <link href="https://leap.tardate.com/electronics101/toroidjoulethief/"/> <g:image_link>https://leap.tardate.com/electronics101/toroidjoulethief/assets/toroidjoulethief_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#137 ToroidJouleThief</title> <summary>test a "joule thief" circuit based on a ferrite toroid</summary> <content type="html"><div><p>test a "joule thief" circuit based on a ferrite toroid</p><img src="https://leap.tardate.com/electronics101/toroidjoulethief/assets/toroidjoulethief_build.jpg" /></div></content> <category term="Power"/> <category term="RL"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/playground/countermodule/</id> <link href="https://leap.tardate.com/playground/countermodule/"/> <g:image_link>https://leap.tardate.com/playground/countermodule/assets/countermodule_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#136 CounterModule</title> <summary>a general-purpose CD4017 counter module</summary> <content type="html"><div><p>a general-purpose CD4017 counter module</p><img src="https://leap.tardate.com/playground/countermodule/assets/countermodule_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/touchswitch/</id> <link href="https://leap.tardate.com/electronics101/555timer/touchswitch/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/touchswitch/assets/touchswitch_build.jpg</g:image_link> <updated>2023-02-07T09:31:38Z</updated> <title>#135 555 Timer Touch Switch</title> <summary>test a touch switch circuit based on a 555 timer</summary> <content type="html"><div><p>test a touch switch circuit based on a 555 timer</p><img src="https://leap.tardate.com/electronics101/555timer/touchswitch/assets/touchswitch_build.jpg" /></div></content> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/bidirectionallevelshiftermodule/</id> <link href="https://leap.tardate.com/electronics101/bidirectionallevelshiftermodule/"/> <g:image_link>https://leap.tardate.com/electronics101/bidirectionallevelshiftermodule/assets/bidirectionallevelshiftermodule_build.jpg</g:image_link> <updated>2020-04-05T09:10:00Z</updated> <title>#134 Bidirectional Level Shifter Module</title> <summary>test a bi-directional 5/3.3V level shifter module</summary> <content type="html"><div><p>test a bi-directional 5/3.3V level shifter module</p><img src="https://leap.tardate.com/electronics101/bidirectionallevelshiftermodule/assets/bidirectionallevelshiftermodule_build.jpg" /></div></content> <category term="FET"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/bidirectionallevelshifter/</id> <link href="https://leap.tardate.com/electronics101/bidirectionallevelshifter/"/> <g:image_link>https://leap.tardate.com/electronics101/bidirectionallevelshifter/assets/bidirectionallevelshifter_build.jpg</g:image_link> <updated>2021-09-12T08:12:35Z</updated> <title>#133 Bi-directional Level Shifter</title> <summary>test a basic bi-directional 5/3.3V level shifter circuit</summary> <content type="html"><div><p>test a basic bi-directional 5/3.3V level shifter circuit</p><img src="https://leap.tardate.com/electronics101/bidirectionallevelshifter/assets/bidirectionallevelshifter_build.jpg" /></div></content> <category term="FET"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/amtransmitter/</id> <link href="https://leap.tardate.com/electronics101/555timer/amtransmitter/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/amtransmitter/assets/amtransmitter_build.jpg</g:image_link> <updated>2020-11-27T17:47:57Z</updated> <title>#132 555 AM Transmitter</title> <summary>a simple 555-based AM transmitter</summary> <content type="html"><div><p>a simple 555-based AM transmitter</p><img src="https://leap.tardate.com/electronics101/555timer/amtransmitter/assets/amtransmitter_build.jpg" /></div></content> <category term="Radio"/> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/radio/amfmradiokit/</id> <link href="https://leap.tardate.com/radio/amfmradiokit/"/> <g:image_link>https://leap.tardate.com/radio/amfmradiokit/assets/amfmradiokit_build.jpg</g:image_link> <updated>2019-04-28T05:47:59Z</updated> <title>#131 AM/FM Radio Kit</title> <summary>build notes for an AM/FM radio kit using the CD7642 AM, CD9088 FM and TDA2822 amp chips</summary> <content type="html"><div><p>build notes for an AM/FM radio kit using the CD7642 AM, CD9088 FM and TDA2822 amp chips</p><img src="https://leap.tardate.com/radio/amfmradiokit/assets/amfmradiokit_build.jpg" /></div></content> <category term="Radio"/> <category term="AM"/> <category term="FM"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/darlingtontouchswitch/</id> <link href="https://leap.tardate.com/electronics101/darlingtontouchswitch/"/> <g:image_link>https://leap.tardate.com/electronics101/darlingtontouchswitch/assets/darlingtontouchswitch_build.jpg</g:image_link> <updated>2023-02-07T09:31:38Z</updated> <title>#130 Darlington Touch Switch</title> <summary>test a Darlington-pair touch switch</summary> <content type="html"><div><p>test a Darlington-pair touch switch</p><img src="https://leap.tardate.com/electronics101/darlingtontouchswitch/assets/darlingtontouchswitch_build.jpg" /></div></content> <category term="Sensors"/> <category term="BJT"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/relaxationjoulethief/</id> <link href="https://leap.tardate.com/electronics101/relaxationjoulethief/"/> <g:image_link>https://leap.tardate.com/electronics101/relaxationjoulethief/assets/relaxationjoulethief_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#129 RelaxationJouleThief</title> <summary>test a "joule thief" circuit based on a relaxation oscillator</summary> <content type="html"><div><p>test a "joule thief" circuit based on a relaxation oscillator</p><img src="https://leap.tardate.com/electronics101/relaxationjoulethief/assets/relaxationjoulethief_build.jpg" /></div></content> <category term="Power"/> <category term="RLC"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/playground/attiny/totalsleep/</id> <link href="https://leap.tardate.com/playground/attiny/totalsleep/"/> <g:image_link>https://leap.tardate.com/playground/attiny/totalsleep/assets/totalsleep_build.jpg</g:image_link> <updated>2020-02-17T17:45:56Z</updated> <title>#128 ATtiny TotalSleep</title> <summary>test a total power shutdown with an ATtiny85 processor on a breadboard</summary> <content type="html"><div><p>test a total power shutdown with an ATtiny85 processor on a breadboard</p><img src="https://leap.tardate.com/playground/attiny/totalsleep/assets/totalsleep_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> </entry> <entry> <id>https://leap.tardate.com/playground/attiny/sleepmode/</id> <link href="https://leap.tardate.com/playground/attiny/sleepmode/"/> <g:image_link>https://leap.tardate.com/playground/attiny/sleepmode/assets/sleepmode_build.jpg</g:image_link> <updated>2020-02-17T17:45:56Z</updated> <title>#127 ATtiny SleepMode</title> <summary>test sleep mode with an ATtiny85 processor on a breadboard</summary> <content type="html"><div><p>test sleep mode with an ATtiny85 processor on a breadboard</p><img src="https://leap.tardate.com/playground/attiny/sleepmode/assets/sleepmode_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> </entry> <entry> <id>https://leap.tardate.com/playground/attiny/hardwareinterrupt/</id> <link href="https://leap.tardate.com/playground/attiny/hardwareinterrupt/"/> <g:image_link>https://leap.tardate.com/playground/attiny/hardwareinterrupt/assets/hardwareinterrupt_build.jpg</g:image_link> <updated>2020-02-17T17:45:56Z</updated> <title>#126 ATtiny Hardware Interrupt</title> <summary>test hardware interrupts with an ATtiny85 processor on a breadboard</summary> <content type="html"><div><p>test hardware interrupts with an ATtiny85 processor on a breadboard</p><img src="https://leap.tardate.com/playground/attiny/hardwareinterrupt/assets/hardwareinterrupt_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> </entry> <entry> <id>https://leap.tardate.com/audio/visualization/voicelevelindicatorkit/</id> <link href="https://leap.tardate.com/audio/visualization/voicelevelindicatorkit/"/> <g:image_link>https://leap.tardate.com/audio/visualization/voicelevelindicatorkit/assets/voicelevelindicatorkit_build.jpg</g:image_link> <updated>2022-09-03T11:05:51Z</updated> <title>#125 Voice Level Indicator Kit</title> <summary>build and investigate a commercially available "3-band voice level indicator" kit</summary> <content type="html"><div><p>build and investigate a commercially available "3-band voice level indicator" kit</p><img src="https://leap.tardate.com/audio/visualization/voicelevelindicatorkit/assets/voicelevelindicatorkit_build.jpg" /></div></content> <category term="LED"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/emrdetection/rfdetectorprobe/</id> <link href="https://leap.tardate.com/electronics101/emrdetection/rfdetectorprobe/"/> <g:image_link>https://leap.tardate.com/electronics101/emrdetection/rfdetectorprobe/assets/rfdetectorprobe_build.jpg</g:image_link> <updated>2018-07-08T04:38:55Z</updated> <title>#124 RFDetectorProbe</title> <summary>a simple RF detector mounted in a pen</summary> <content type="html"><div><p>a simple RF detector mounted in a pen</p><img src="https://leap.tardate.com/electronics101/emrdetection/rfdetectorprobe/assets/rfdetectorprobe_build.jpg" /></div></content> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/radio/am/hx6b/</id> <link href="https://leap.tardate.com/radio/am/hx6b/"/> <g:image_link>https://leap.tardate.com/radio/am/hx6b/assets/hx6b_build.jpg</g:image_link> <updated>2019-03-12T11:24:48Z</updated> <title>#123 HX6B</title> <summary>build and analyse the HX-6B superheterodyne AM MW radio receiver kit</summary> <content type="html"><div><p>build and analyse the HX-6B superheterodyne AM MW radio receiver kit</p><img src="https://leap.tardate.com/radio/am/hx6b/assets/hx6b_build.jpg" /></div></content> <category term="Radio"/> <category term="AM"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/opamptimer/</id> <link href="https://leap.tardate.com/electronics101/opamptimer/"/> <g:image_link>https://leap.tardate.com/electronics101/opamptimer/assets/opamptimer_build.jpg</g:image_link> <updated>2023-02-07T09:31:38Z</updated> <title>#122 Op-amp Timer</title> <summary>testing an op-amp timer switch</summary> <content type="html"><div><p>testing an op-amp timer switch</p><img src="https://leap.tardate.com/electronics101/opamptimer/assets/opamptimer_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/detectors/peakdetector/</id> <link href="https://leap.tardate.com/electronics101/detectors/peakdetector/"/> <g:image_link>https://leap.tardate.com/electronics101/detectors/peakdetector/assets/peakdetector_build.jpg</g:image_link> <updated>2020-03-28T03:05:36Z</updated> <title>#121 Peak Detector</title> <summary>test an OpAmp-based peak detector circuit</summary> <content type="html"><div><p>test an OpAmp-based peak detector circuit</p><img src="https://leap.tardate.com/electronics101/detectors/peakdetector/assets/peakdetector_build.jpg" /></div></content> <category term="OpAmp"/> <category term="RC"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/detectors/simplepeakdetector/</id> <link href="https://leap.tardate.com/electronics101/detectors/simplepeakdetector/"/> <g:image_link>https://leap.tardate.com/electronics101/detectors/simplepeakdetector/assets/simplepeakdetector_build.jpg</g:image_link> <updated>2020-03-28T03:05:36Z</updated> <title>#120 Simple Peak Detector</title> <summary>test the basic diode-RC peak detector circuit</summary> <content type="html"><div><p>test the basic diode-RC peak detector circuit</p><img src="https://leap.tardate.com/electronics101/detectors/simplepeakdetector/assets/simplepeakdetector_build.jpg" /></div></content> <category term="RC"/> </entry> <entry> <id>https://leap.tardate.com/playground/rotaryencodermodule/</id> <link href="https://leap.tardate.com/playground/rotaryencodermodule/"/> <g:image_link>https://leap.tardate.com/playground/rotaryencodermodule/assets/rotaryencodermodule_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#119 RotaryEncoderModule</title> <summary>testing a Rotary Encoder module controlling an LED 8x8 display</summary> <content type="html"><div><p>testing a Rotary Encoder module controlling an LED 8x8 display</p><img src="https://leap.tardate.com/playground/rotaryencodermodule/assets/rotaryencodermodule_build.jpg" /></div></content> <category term="Sensors"/> <category term="LED 8x8"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/rotaryencodermethods/</id> <link href="https://leap.tardate.com/playground/rotaryencodermethods/"/> <g:image_link>https://leap.tardate.com/playground/rotaryencodermethods/assets/rotaryencodermethods_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#118 RotaryEncoderMethods</title> <summary>finding the best method for reading a rotary-encoder</summary> <content type="html"><div><p>finding the best method for reading a rotary-encoder</p><img src="https://leap.tardate.com/playground/rotaryencodermethods/assets/rotaryencodermethods_build.jpg" /></div></content> <category term="Sensors"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/solenoids/solenoiddiy/</id> <link href="https://leap.tardate.com/kinetics/solenoids/solenoiddiy/"/> <g:image_link>https://leap.tardate.com/kinetics/solenoids/solenoiddiy/assets/solenoiddiy_build.jpg</g:image_link> <updated>2019-08-18T03:38:40Z</updated> <title>#117 Solenoid DIY</title> <summary>build and test a basic electromechanical solenoid</summary> <content type="html"><div><p>build and test a basic electromechanical solenoid</p><img src="https://leap.tardate.com/kinetics/solenoids/solenoiddiy/assets/solenoiddiy_build.jpg" /></div></content> <category term="Solenoid"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/switchnjfet/</id> <link href="https://leap.tardate.com/electronics101/switchnjfet/"/> <g:image_link>https://leap.tardate.com/electronics101/switchnjfet/assets/switchnjfet_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#116 Switch - NJFET</title> <summary>switch an independent power source using an Arduino and n-channel JFET</summary> <content type="html"><div><p>switch an independent power source using an Arduino and n-channel JFET</p><img src="https://leap.tardate.com/electronics101/switchnjfet/assets/switchnjfet_build.jpg" /></div></content> <category term="JFET"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/r2rdac/</id> <link href="https://leap.tardate.com/playground/r2rdac/"/> <g:image_link>https://leap.tardate.com/playground/r2rdac/assets/r2rdac_build.jpg</g:image_link> <updated>2016-11-05T03:45:38Z</updated> <title>#115 R2RDAC</title> <summary>build and test a 16-bit R2R-ladder digital to analog converter with shift register interface</summary> <content type="html"><div><p>build and test a 16-bit R2R-ladder digital to analog converter with shift register interface</p><img src="https://leap.tardate.com/playground/r2rdac/assets/r2rdac_build.jpg" /></div></content> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/norgateoscillator/</id> <link href="https://leap.tardate.com/electronics101/oscillators/norgateoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/norgateoscillator/assets/norgateoscillator_build.jpg</g:image_link> <updated>2022-09-16T13:35:07Z</updated> <title>#114 NOR Gate Oscillator</title> <summary>test a low-speed square wave oscillator using NOR gates</summary> <content type="html"><div><p>test a low-speed square wave oscillator using NOR gates</p><img src="https://leap.tardate.com/electronics101/oscillators/norgateoscillator/assets/norgateoscillator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Oscillators"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ttlbufferdriver/</id> <link href="https://leap.tardate.com/electronics101/ttlbufferdriver/"/> <g:image_link>https://leap.tardate.com/electronics101/ttlbufferdriver/assets/ttlbufferdriver_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#113 TTL Buffer Driver</title> <summary>using an OpAmp as a final buffer stage for TTL or similar circuits</summary> <content type="html"><div><p>using an OpAmp as a final buffer stage for TTL or similar circuits</p><img src="https://leap.tardate.com/electronics101/ttlbufferdriver/assets/ttlbufferdriver_build.jpg" /></div></content> <category term="OpAmp"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/resistortransistorlogic/or/</id> <link href="https://leap.tardate.com/electronics101/resistortransistorlogic/or/"/> <g:image_link>https://leap.tardate.com/electronics101/resistortransistorlogic/or/assets/or_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#112 OR Gate with Resistor-Transistor Logic</title> <summary>test the basic resistor-transistor logic OR gate</summary> <content type="html"><div><p>test the basic resistor-transistor logic OR gate</p><img src="https://leap.tardate.com/electronics101/resistortransistorlogic/or/assets/or_build.jpg" /></div></content> <category term="BJT"/> <category term="RTL"/> <category term="Digital Logic"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/resistortransistorlogic/nor/</id> <link href="https://leap.tardate.com/electronics101/resistortransistorlogic/nor/"/> <g:image_link>https://leap.tardate.com/electronics101/resistortransistorlogic/nor/assets/nor_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#111 NOR Gate with Resistor-Transistor Logic</title> <summary>test the basic resistor-transistor logic NOR gate </summary> <content type="html"><div><p>test the basic resistor-transistor logic NOR gate </p><img src="https://leap.tardate.com/electronics101/resistortransistorlogic/nor/assets/nor_build.jpg" /></div></content> <category term="BJT"/> <category term="RTL"/> <category term="Digital Logic"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/diodelogic/and/</id> <link href="https://leap.tardate.com/electronics101/diodelogic/and/"/> <g:image_link>https://leap.tardate.com/electronics101/diodelogic/and/assets/and_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#110 AND Gate with Diode Logic</title> <summary>test the basic diode-logic AND gate</summary> <content type="html"><div><p>test the basic diode-logic AND gate</p><img src="https://leap.tardate.com/electronics101/diodelogic/and/assets/and_build.jpg" /></div></content> <category term="Diode"/> <category term="Digital Logic"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/diodelogic/or/</id> <link href="https://leap.tardate.com/electronics101/diodelogic/or/"/> <g:image_link>https://leap.tardate.com/electronics101/diodelogic/or/assets/or_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#109 OR Gate with Diode Logic</title> <summary>test the basic diode-logic OR gate</summary> <content type="html"><div><p>test the basic diode-logic OR gate</p><img src="https://leap.tardate.com/electronics101/diodelogic/or/assets/or_build.jpg" /></div></content> <category term="Diode"/> <category term="Digital Logic"/> </entry> <entry> <id>https://leap.tardate.com/playground/ringcountercontroller/</id> <link href="https://leap.tardate.com/playground/ringcountercontroller/"/> <g:image_link>https://leap.tardate.com/playground/ringcountercontroller/assets/ringcountercontroller_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#108 RingCounterController</title> <summary>control the classic CD4017 walking-ring counter with an Arduino</summary> <content type="html"><div><p>control the classic CD4017 walking-ring counter with an Arduino</p><img src="https://leap.tardate.com/playground/ringcountercontroller/assets/ringcountercontroller_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ringcounter/</id> <link href="https://leap.tardate.com/electronics101/ringcounter/"/> <g:image_link>https://leap.tardate.com/electronics101/ringcounter/assets/ringcounter_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#107 Ring Counter</title> <summary>test the classic CD4017 walking-ring counter</summary> <content type="html"><div><p>test the classic CD4017 walking-ring counter</p><img src="https://leap.tardate.com/electronics101/ringcounter/assets/ringcounter_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/switchpfet/</id> <link href="https://leap.tardate.com/electronics101/switchpfet/"/> <g:image_link>https://leap.tardate.com/electronics101/switchpfet/assets/switchpfet_build.jpg</g:image_link> <updated>2023-02-07T09:31:38Z</updated> <title>#106 PFET Switch with Delay</title> <summary>small-signal p-channel MOSFET switch with turn-on delay</summary> <content type="html"><div><p>small-signal p-channel MOSFET switch with turn-on delay</p><img src="https://leap.tardate.com/electronics101/switchpfet/assets/switchpfet_build.jpg" /></div></content> <category term="MOSFET"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/bjt/sawtooth/</id> <link href="https://leap.tardate.com/electronics101/bjt/sawtooth/"/> <g:image_link>https://leap.tardate.com/electronics101/bjt/sawtooth/assets/sawtooth_build.jpg</g:image_link> <updated>2018-01-25T02:34:55Z</updated> <title>#105 BJT SawTooth</title> <summary>testing a simple BJT saw-tooth oscillator</summary> <content type="html"><div><p>testing a simple BJT saw-tooth oscillator</p><img src="https://leap.tardate.com/electronics101/bjt/sawtooth/assets/sawtooth_build.jpg" /></div></content> <category term="BJT"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioamps/ruby/</id> <link href="https://leap.tardate.com/audio/audioamps/ruby/"/> <g:image_link>https://leap.tardate.com/audio/audioamps/ruby/assets/ruby_build.jpg</g:image_link> <updated>2020-06-06T05:35:40Z</updated> <title>#104 Ruby Guitar Amp</title> <summary>a version of the runoffgroove Ruby LM386 guitar amp</summary> <content type="html"><div><p>a version of the runoffgroove Ruby LM386 guitar amp</p><img src="https://leap.tardate.com/audio/audioamps/ruby/assets/ruby_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/playground/led8x8/ledcontroldemo/</id> <link href="https://leap.tardate.com/playground/led8x8/ledcontroldemo/"/> <g:image_link>https://leap.tardate.com/playground/led8x8/ledcontroldemo/assets/ledcontroldemo_build.jpg</g:image_link> <updated>2019-05-02T16:17:15Z</updated> <title>#103 8x8 LED Matrix LedControl</title> <summary>test driving and LED matrix with the LedControl library</summary> <content type="html"><div><p>test driving and LED matrix with the LedControl library</p><img src="https://leap.tardate.com/playground/led8x8/ledcontroldemo/assets/ledcontroldemo_build.jpg" /></div></content> <category term="LED 8x8"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/solenoidcontrol/</id> <link href="https://leap.tardate.com/playground/solenoidcontrol/"/> <g:image_link>https://leap.tardate.com/playground/solenoidcontrol/assets/solenoidcontrol_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#102 SolenoidControl</title> <summary>controlling a mini solenoid with an Arduino</summary> <content type="html"><div><p>controlling a mini solenoid with an Arduino</p><img src="https://leap.tardate.com/playground/solenoidcontrol/assets/solenoidcontrol_build.jpg" /></div></content> <category term="Solenoid"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/led8x8/maxrawdemo/</id> <link href="https://leap.tardate.com/playground/led8x8/maxrawdemo/"/> <g:image_link>https://leap.tardate.com/playground/led8x8/maxrawdemo/assets/maxrawdemo_build.jpg</g:image_link> <updated>2019-05-02T16:17:15Z</updated> <title>#101 8x8 LED Matrix Raw Drive</title> <summary>drive an 8x8 LED Matrix with a MAX7219 chip and raw SPI commands</summary> <content type="html"><div><p>drive an 8x8 LED Matrix with a MAX7219 chip and raw SPI commands</p><img src="https://leap.tardate.com/playground/led8x8/maxrawdemo/assets/maxrawdemo_build.jpg" /></div></content> <category term="LED 8x8"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/oled/ardwinvaders/</id> <link href="https://leap.tardate.com/playground/oled/ardwinvaders/"/> <g:image_link>https://leap.tardate.com/playground/oled/ardwinvaders/assets/ardwinvaders_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#100 ArdWinVaders</title> <summary>an Arduino & OLED version of a classic game</summary> <content type="html"><div><p>an Arduino &amp; OLED version of a classic game</p><img src="https://leap.tardate.com/playground/oled/ardwinvaders/assets/ardwinvaders_build.jpg" /></div></content> <category term="Arduino"/> <category term="OLED"/> </entry> <entry> <id>https://leap.tardate.com/playground/atmegaispshield/</id> <link href="https://leap.tardate.com/playground/atmegaispshield/"/> <g:image_link>https://leap.tardate.com/playground/atmegaispshield/assets/atmegaispshield_build.jpg</g:image_link> <updated>2018-07-22T16:39:25Z</updated> <title>#099 ATmegaISPShield</title> <summary>a DIY ATmega programming shield for using an Arduino as ISP </summary> <content type="html"><div><p>a DIY ATmega programming shield for using an Arduino as ISP </p><img src="https://leap.tardate.com/playground/atmegaispshield/assets/atmegaispshield_build.jpg" /></div></content> <category term="Arduino"/> <category term="ATmel"/> <category term="ICSP"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioamps/guitarheadphoneamp/</id> <link href="https://leap.tardate.com/audio/audioamps/guitarheadphoneamp/"/> <g:image_link>https://leap.tardate.com/audio/audioamps/guitarheadphoneamp/assets/guitarheadphoneamp_build.jpg</g:image_link> <updated>2020-06-06T05:35:40Z</updated> <title>#098 Guitar Headphone Amp</title> <summary>an LM386 fixed-gain guitar headphone amp</summary> <content type="html"><div><p>an LM386 fixed-gain guitar headphone amp</p><img src="https://leap.tardate.com/audio/audioamps/guitarheadphoneamp/assets/guitarheadphoneamp_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioamps/volumecontrolpoweramp/</id> <link href="https://leap.tardate.com/audio/audioamps/volumecontrolpoweramp/"/> <g:image_link>https://leap.tardate.com/audio/audioamps/volumecontrolpoweramp/assets/volumecontrolpoweramp_build.jpg</g:image_link> <updated>2020-06-06T05:35:40Z</updated> <title>#097 Volume Control Power Amp</title> <summary>an LM386 fixed-gain audio power amp with volume control</summary> <content type="html"><div><p>an LM386 fixed-gain audio power amp with volume control</p><img src="https://leap.tardate.com/audio/audioamps/volumecontrolpoweramp/assets/volumecontrolpoweramp_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioamps/smokey/</id> <link href="https://leap.tardate.com/audio/audioamps/smokey/"/> <g:image_link>https://leap.tardate.com/audio/audioamps/smokey/assets/smokey_build.jpg</g:image_link> <updated>2020-06-06T05:35:40Z</updated> <title>#096 Smokey</title> <summary>quick build of a Smokey-like LM386 guitar power amp</summary> <content type="html"><div><p>quick build of a Smokey-like LM386 guitar power amp</p><img src="https://leap.tardate.com/audio/audioamps/smokey/assets/smokey_build.jpg" /></div></content> <category term="Amplifier"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/audio/audioamps/littlegem/</id> <link href="https://leap.tardate.com/audio/audioamps/littlegem/"/> <g:image_link>https://leap.tardate.com/audio/audioamps/littlegem/assets/littlegem_build.jpg</g:image_link> <updated>2020-06-06T05:35:40Z</updated> <title>#095 Little Gem</title> <summary>a basic Smokey-inspired LM386 guitar power amp</summary> <content type="html"><div><p>a basic Smokey-inspired LM386 guitar power amp</p><img src="https://leap.tardate.com/audio/audioamps/littlegem/assets/littlegem_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/bjt/longtailpair/</id> <link href="https://leap.tardate.com/electronics101/bjt/longtailpair/"/> <g:image_link>https://leap.tardate.com/electronics101/bjt/longtailpair/assets/longtailpair_build.jpg</g:image_link> <updated>2018-02-11T14:45:00Z</updated> <title>#094 BJT LongTail Pair</title> <summary>test the basic BJT "long-tail" differential amplifier circuit</summary> <content type="html"><div><p>test the basic BJT "long-tail" differential amplifier circuit</p><img src="https://leap.tardate.com/electronics101/bjt/longtailpair/assets/longtailpair_build.jpg" /></div></content> <category term="BJT"/> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/bjt/currentsink/</id> <link href="https://leap.tardate.com/electronics101/bjt/currentsink/"/> <g:image_link>https://leap.tardate.com/electronics101/bjt/currentsink/assets/currentsink_build.jpg</g:image_link> <updated>2018-01-25T02:34:55Z</updated> <title>#093 BJT CurrentSink</title> <summary>test a BJT constant current sink circuit</summary> <content type="html"><div><p>test a BJT constant current sink circuit</p><img src="https://leap.tardate.com/electronics101/bjt/currentsink/assets/currentsink_build.jpg" /></div></content> <category term="BJT"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/linearregulators/lm317cc/</id> <link href="https://leap.tardate.com/electronics101/power/linearregulators/lm317cc/"/> <g:image_link>https://leap.tardate.com/electronics101/power/linearregulators/lm317cc/assets/lm317cc_build.jpg</g:image_link> <updated>2024-04-10T06:00:48Z</updated> <title>#092 LM317 Constant Current Power Supply</title> <summary>test a constant current power supply built with the LM317</summary> <content type="html"><div><p>test a constant current power supply built with the LM317</p><img src="https://leap.tardate.com/electronics101/power/linearregulators/lm317cc/assets/lm317cc_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/switchpjfet/</id> <link href="https://leap.tardate.com/electronics101/switchpjfet/"/> <g:image_link>https://leap.tardate.com/electronics101/switchpjfet/assets/switchpjfet_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#091 Switch - PJFET</title> <summary>switch an independent power source using an Arduino and p-channel JFET</summary> <content type="html"><div><p>switch an independent power source using an Arduino and p-channel JFET</p><img src="https://leap.tardate.com/electronics101/switchpjfet/assets/switchpjfet_build.jpg" /></div></content> <category term="JFET"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/plotnvalues/</id> <link href="https://leap.tardate.com/playground/plotnvalues/"/> <g:image_link>https://leap.tardate.com/playground/plotnvalues/assets/plotnvalues_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#090 PlotNValues</title> <summary>generic script to sample up to 6 analog inputs and stream the data to serial in ASCII format for plotting with Processing</summary> <content type="html"><div><p>generic script to sample up to 6 analog inputs and stream the data to serial in ASCII format for plotting with Processing</p><img src="https://leap.tardate.com/playground/plotnvalues/assets/plotnvalues_build.jpg" /></div></content> <category term="Arduino"/> <category term="Processing"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/breathelamp/</id> <link href="https://leap.tardate.com/electronics101/breathelamp/"/> <g:image_link>https://leap.tardate.com/electronics101/breathelamp/assets/breathelamp_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#089 Breathing Lamp Effect</title> <summary>build and test a common LED visual effect circuit</summary> <content type="html"><div><p>build and test a common LED visual effect circuit</p><img src="https://leap.tardate.com/electronics101/breathelamp/assets/breathelamp_build.jpg" /></div></content> <category term="OpAmp"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/8051/electronicclockkit/</id> <link href="https://leap.tardate.com/8051/electronicclockkit/"/> <g:image_link>https://leap.tardate.com/8051/electronicclockkit/assets/electronicclockkit_build.jpg</g:image_link> <updated>2023-03-27T13:57:21Z</updated> <title>#088 Electronic Clock Kit</title> <summary>build and investigate a commercially available "electronic clock" kit</summary> <content type="html"><div><p>build and investigate a commercially available "electronic clock" kit</p><img src="https://leap.tardate.com/8051/electronicclockkit/assets/electronicclockkit_build.jpg" /></div></content> <category term="LCD"/> <category term="8051"/> </entry> <entry> <id>https://leap.tardate.com/playground/oled/ssd1306bareback/</id> <link href="https://leap.tardate.com/playground/oled/ssd1306bareback/"/> <g:image_link>https://leap.tardate.com/playground/oled/ssd1306bareback/assets/ssd1306bareback_build.jpg</g:image_link> <updated>2020-02-16T16:08:47Z</updated> <title>#087 SSD1306 OLED Bareback SPI</title> <summary>driving a monochrome 128x64 OLED Display with an Arduino and the raw command set over SPI</summary> <content type="html"><div><p>driving a monochrome 128x64 OLED Display with an Arduino and the raw command set over SPI</p><img src="https://leap.tardate.com/playground/oled/ssd1306bareback/assets/ssd1306bareback_build.jpg" /></div></content> <category term="OLED"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/oled/ssd1306withadafruitlibraries/</id> <link href="https://leap.tardate.com/playground/oled/ssd1306withadafruitlibraries/"/> <g:image_link>https://leap.tardate.com/playground/oled/ssd1306withadafruitlibraries/assets/ssd1306withadafruitlibraries_build.jpg</g:image_link> <updated>2020-01-27T10:31:38Z</updated> <title>#086 SSD1306 OLED With AdaFruit Libraries</title> <summary>running the AdaFruit example program with a monochrome 128x64 OLED Display</summary> <content type="html"><div><p>running the AdaFruit example program with a monochrome 128x64 OLED Display</p><img src="https://leap.tardate.com/playground/oled/ssd1306withadafruitlibraries/assets/ssd1306withadafruitlibraries_build.jpg" /></div></content> <category term="OLED"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/lcd5110/bareback/</id> <link href="https://leap.tardate.com/playground/lcd5110/bareback/"/> <g:image_link>https://leap.tardate.com/playground/lcd5110/bareback/assets/bareback_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#085 Lcd5110/BareBack</title> <summary>driving a Nokia 5110 LCD Display with an Arduino and the raw command set</summary> <content type="html"><div><p>driving a Nokia 5110 LCD Display with an Arduino and the raw command set</p><img src="https://leap.tardate.com/playground/lcd5110/bareback/assets/bareback_build.jpg" /></div></content> <category term="LCD"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/roulettekit/</id> <link href="https://leap.tardate.com/electronics101/555timer/roulettekit/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/roulettekit/assets/roulettekit_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#084 Roulette Kit</title> <summary>build and examine the workings of a commercial 555 Roulette kit</summary> <content type="html"><div><p>build and examine the workings of a commercial 555 Roulette kit</p><img src="https://leap.tardate.com/electronics101/555timer/roulettekit/assets/roulettekit_build.jpg" /></div></content> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/transistortester/</id> <link href="https://leap.tardate.com/electronics101/transistortester/"/> <g:image_link>https://leap.tardate.com/electronics101/transistortester/assets/transistortester_build.jpg</g:image_link> <updated>2019-09-07T08:50:36Z</updated> <title>#083 Transistor Tester</title> <summary>use an Arduino to test NPN and PNP BJTs</summary> <content type="html"><div><p>use an Arduino to test NPN and PNP BJTs</p><img src="https://leap.tardate.com/electronics101/transistortester/assets/transistortester_build.jpg" /></div></content> <category term="Arduino"/> <category term="BJT"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/emrdetection/mobilerfdetectorkit/</id> <link href="https://leap.tardate.com/electronics101/emrdetection/mobilerfdetectorkit/"/> <g:image_link>https://leap.tardate.com/electronics101/emrdetection/mobilerfdetectorkit/assets/mobilerfdetectorkit_build.jpg</g:image_link> <updated>2018-07-08T04:38:55Z</updated> <title>#082 MobileRFDetectorKit</title> <summary>build and investigate a commercially available "mobile phone signal" detector kit</summary> <content type="html"><div><p>build and investigate a commercially available "mobile phone signal" detector kit</p><img src="https://leap.tardate.com/electronics101/emrdetection/mobilerfdetectorkit/assets/mobilerfdetectorkit_build.jpg" /></div></content> <category term="Radio"/> </entry> <entry> <id>https://leap.tardate.com/playground/led4digit7segment/doubleshiftwithfets/</id> <link href="https://leap.tardate.com/playground/led4digit7segment/doubleshiftwithfets/"/> <g:image_link>https://leap.tardate.com/playground/led4digit7segment/doubleshiftwithfets/assets/doubleshiftwithfets_build.jpg</g:image_link> <updated>2020-10-02T13:02:32Z</updated> <title>#081 4x7-Segment Double Shift With FETs</title> <summary>driving a 4-Digit 7-Segment LED display with only 3 pins, using two 74HC595 shift registers and some n-channel FETs</summary> <content type="html"><div><p>driving a 4-Digit 7-Segment LED display with only 3 pins, using two 74HC595 shift registers and some n-channel FETs</p><img src="https://leap.tardate.com/playground/led4digit7segment/doubleshiftwithfets/assets/doubleshiftwithfets_build.jpg" /></div></content> <category term="LED"/> <category term="LED 7-Segment"/> <category term="CMOS/TTL"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/led4digit7segment/doubleshift/</id> <link href="https://leap.tardate.com/playground/led4digit7segment/doubleshift/"/> <g:image_link>https://leap.tardate.com/playground/led4digit7segment/doubleshift/assets/doubleshift_build.jpg</g:image_link> <updated>2020-10-02T13:02:32Z</updated> <title>#080 4x7-Segment Double Shift</title> <summary>driving a 4-Digit 7-Segment LED display with only 3 pins, using two 74HC595 shift registers and some NPN BJTs</summary> <content type="html"><div><p>driving a 4-Digit 7-Segment LED display with only 3 pins, using two 74HC595 shift registers and some NPN BJTs</p><img src="https://leap.tardate.com/playground/led4digit7segment/doubleshift/assets/doubleshift_build.jpg" /></div></content> <category term="LED"/> <category term="LED 7-Segment"/> <category term="CMOS/TTL"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/ledtemperaturedisplay/</id> <link href="https://leap.tardate.com/playground/ledtemperaturedisplay/"/> <g:image_link>https://leap.tardate.com/playground/ledtemperaturedisplay/assets/ledtemperaturedisplay_build.jpg</g:image_link> <updated>2021-08-15T13:42:05Z</updated> <title>#079 7-Segment Temperature Display</title> <summary>Measure ambient temperature with an LM35 and display with a 4-digit 7-segment LED unit</summary> <content type="html"><div><p>Measure ambient temperature with an LM35 and display with a 4-digit 7-segment LED unit</p><img src="https://leap.tardate.com/playground/ledtemperaturedisplay/assets/ledtemperaturedisplay_build.jpg" /></div></content> <category term="Sensors"/> <category term="LM35"/> <category term="LED 7-Segment"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/led4digit7segment/singleshift/</id> <link href="https://leap.tardate.com/playground/led4digit7segment/singleshift/"/> <g:image_link>https://leap.tardate.com/playground/led4digit7segment/singleshift/assets/singleshift_build.jpg</g:image_link> <updated>2020-10-02T13:02:32Z</updated> <title>#078 4x7-Segment Single Shift</title> <summary>driving a 4-digit 7-segment LED display with a shift register and a few BJTs</summary> <content type="html"><div><p>driving a 4-digit 7-segment LED display with a shift register and a few BJTs</p><img src="https://leap.tardate.com/playground/led4digit7segment/singleshift/assets/singleshift_build.jpg" /></div></content> <category term="LED 7-Segment"/> <category term="CMOS/TTL"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitallogic/srlatchwithnorgates/</id> <link href="https://leap.tardate.com/electronics101/digitallogic/srlatchwithnorgates/"/> <g:image_link>https://leap.tardate.com/electronics101/digitallogic/srlatchwithnorgates/assets/srlatchwithnorgates_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#077 NOR Gate SR Latch</title> <summary>Set-Reset latch implemented with NOR gates</summary> <content type="html"><div><p>Set-Reset latch implemented with NOR gates</p><img src="https://leap.tardate.com/electronics101/digitallogic/srlatchwithnorgates/assets/srlatchwithnorgates_build.jpg" /></div></content> <category term="Digital Logic"/> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/playground/monostablepulseextender/</id> <link href="https://leap.tardate.com/playground/monostablepulseextender/"/> <g:image_link>https://leap.tardate.com/playground/monostablepulseextender/assets/monostablepulseextender_build.jpg</g:image_link> <updated>2022-12-18T01:02:41Z</updated> <title>#076 Monostable Pulse Extender</title> <summary>test the behaviour of a 74LS122 monostable with external timing configuration and plot the results with an Arduino</summary> <content type="html"><div><p>test the behaviour of a 74LS122 monostable with external timing configuration and plot the results with an Arduino</p><img src="https://leap.tardate.com/playground/monostablepulseextender/assets/monostablepulseextender_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/monostable122/</id> <link href="https://leap.tardate.com/electronics101/monostable122/"/> <g:image_link>https://leap.tardate.com/electronics101/monostable122/assets/monostable122_build.jpg</g:image_link> <updated>2019-09-07T08:50:36Z</updated> <title>#075 Monostable 74LS122</title> <summary>simple pulse trigger using 74LS122 monostable with external timing configuration</summary> <content type="html"><div><p>simple pulse trigger using 74LS122 monostable with external timing configuration</p><img src="https://leap.tardate.com/electronics101/monostable122/assets/monostable122_build.jpg" /></div></content> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/playground/ir/testir/</id> <link href="https://leap.tardate.com/playground/ir/testir/"/> <g:image_link>https://leap.tardate.com/playground/ir/testir/assets/testir_build.jpg</g:image_link> <updated>2022-02-21T17:33:20Z</updated> <title>#074 Raw Arduino Infrared</title> <summary>test raw IR reception with a TSOP1838-type IR sensor and an Arduino</summary> <content type="html"><div><p>test raw IR reception with a TSOP1838-type IR sensor and an Arduino</p><img src="https://leap.tardate.com/playground/ir/testir/assets/testir_build.jpg" /></div></content> <category term="IR"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/quadnor/</id> <link href="https://leap.tardate.com/electronics101/quadnor/"/> <g:image_link>https://leap.tardate.com/electronics101/quadnor/assets/quadnor_build.jpg</g:image_link> <updated>2017-05-24T15:39:45Z</updated> <title>#073 QuadNOR</title> <summary>demo simple cascading NOR gate logic with the 74LS02 and an Arduino</summary> <content type="html"><div><p>demo simple cascading NOR gate logic with the 74LS02 and an Arduino</p><img src="https://leap.tardate.com/electronics101/quadnor/assets/quadnor_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/nor7402/</id> <link href="https://leap.tardate.com/electronics101/nor7402/"/> <g:image_link>https://leap.tardate.com/electronics101/nor7402/assets/nor7402_build.jpg</g:image_link> <updated>2017-05-24T15:39:45Z</updated> <title>#072 NOR7402</title> <summary>demo the 74LS02 Quad 2-input NOR gate with an Arduino</summary> <content type="html"><div><p>demo the 74LS02 Quad 2-input NOR gate with an Arduino</p><img src="https://leap.tardate.com/electronics101/nor7402/assets/nor7402_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/attiny/tinyblink/</id> <link href="https://leap.tardate.com/playground/attiny/tinyblink/"/> <g:image_link>https://leap.tardate.com/playground/attiny/tinyblink/assets/tinyblink_build.jpg</g:image_link> <updated>2020-02-17T17:45:56Z</updated> <title>#071 TinyBlink</title> <summary>a simple blink sketch with an ATTINY85-20PU on a breadboard</summary> <content type="html"><div><p>a simple blink sketch with an ATTINY85-20PU on a breadboard</p><img src="https://leap.tardate.com/playground/attiny/tinyblink/assets/tinyblink_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> </entry> <entry> <id>https://leap.tardate.com/playground/attiny/programmingwitharduinoisp/</id> <link href="https://leap.tardate.com/playground/attiny/programmingwitharduinoisp/"/> <g:image_link>https://leap.tardate.com/playground/attiny/programmingwitharduinoisp/assets/programmingwitharduinoisp_build.jpg</g:image_link> <updated>2020-02-17T17:45:56Z</updated> <title>#070 ATtiny Programming over ArduinoISP</title> <summary>programming an ATTINY85-20PU on a breadboard with Arduino ISP</summary> <content type="html"><div><p>programming an ATTINY85-20PU on a breadboard with Arduino ISP</p><img src="https://leap.tardate.com/playground/attiny/programmingwitharduinoisp/assets/programmingwitharduinoisp_build.jpg" /></div></content> <category term="Arduino"/> <category term="AVR"/> <category term="ICSP"/> </entry> <entry> <id>https://leap.tardate.com/playground/atmegabreadboard/</id> <link href="https://leap.tardate.com/playground/atmegabreadboard/"/> <g:image_link>https://leap.tardate.com/playground/atmegabreadboard/assets/atmegabreadboard_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#069 ATmegaBreadboard</title> <summary>running an ATMEGA328P-PU on a breadboard </summary> <content type="html"><div><p>running an ATMEGA328P-PU on a breadboard </p><img src="https://leap.tardate.com/playground/atmegabreadboard/assets/atmegabreadboard_build.jpg" /></div></content> <category term="Arduino"/> <category term="ATmel"/> </entry> <entry> <id>https://leap.tardate.com/playground/atmegaviaarduinoisp/</id> <link href="https://leap.tardate.com/playground/atmegaviaarduinoisp/"/> <g:image_link>https://leap.tardate.com/playground/atmegaviaarduinoisp/assets/atmegaviaarduinoisp_build.jpg</g:image_link> <updated>2018-07-22T16:39:25Z</updated> <title>#068 ATmegaViaArduinoISP</title> <summary>Programming an ATMEGA328P-PU on a breadboard with Arduino ISP</summary> <content type="html"><div><p>Programming an ATMEGA328P-PU on a breadboard with Arduino ISP</p><img src="https://leap.tardate.com/playground/atmegaviaarduinoisp/assets/atmegaviaarduinoisp_build.jpg" /></div></content> <category term="Arduino"/> <category term="ATmel"/> <category term="ICSP"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/led/acbulb/</id> <link href="https://leap.tardate.com/electronics101/led/acbulb/"/> <g:image_link>https://leap.tardate.com/electronics101/led/acbulb/assets/acbulb_build.jpg</g:image_link> <updated>2019-04-20T11:57:36Z</updated> <title>#067 LED AC Bulb</title> <summary>build and analyse a commercial LED lamp kit with capacitive power supply</summary> <content type="html"><div><p>build and analyse a commercial LED lamp kit with capacitive power supply</p><img src="https://leap.tardate.com/electronics101/led/acbulb/assets/acbulb_build.jpg" /></div></content> <category term="Power"/> <category term="LED"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/switchnfet/</id> <link href="https://leap.tardate.com/electronics101/switchnfet/"/> <g:image_link>https://leap.tardate.com/electronics101/switchnfet/assets/switchnfet_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#066 Switch - NFET</title> <summary>small-signal n-channel MOSFET switch with turn-off delay</summary> <content type="html"><div><p>small-signal n-channel MOSFET switch with turn-off delay</p><img src="https://leap.tardate.com/electronics101/switchnfet/assets/switchnfet_build.jpg" /></div></content> <category term="MOSFET"/> </entry> <entry> <id>https://leap.tardate.com/playground/levelindicatorlm3915/</id> <link href="https://leap.tardate.com/playground/levelindicatorlm3915/"/> <g:image_link>https://leap.tardate.com/playground/levelindicatorlm3915/assets/levelindicatorlm3915_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#065 LevelIndicatorLM3915</title> <summary>Driving an LM3915 10-segment display with a single Arduino pin</summary> <content type="html"><div><p>Driving an LM3915 10-segment display with a single Arduino pin</p><img src="https://leap.tardate.com/playground/levelindicatorlm3915/assets/levelindicatorlm3915_build.jpg" /></div></content> <category term="LM3915"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/radio/lpd433/rfswitchask/</id> <link href="https://leap.tardate.com/radio/lpd433/rfswitchask/"/> <g:image_link>https://leap.tardate.com/radio/lpd433/rfswitchask/assets/rfswitchask_build.jpg</g:image_link> <updated>2019-09-22T13:54:58Z</updated> <title>#064 ASK RF Switch</title> <summary>data communications using ASK protocol over 433Mhz RF transmitter and receiver set</summary> <content type="html"><div><p>data communications using ASK protocol over 433Mhz RF transmitter and receiver set</p><img src="https://leap.tardate.com/radio/lpd433/rfswitchask/assets/rfswitchask_build.jpg" /></div></content> <category term="Radio"/> <category term="ASK"/> <category term="Arduino"/> <category term="LPD433"/> </entry> <entry> <id>https://leap.tardate.com/radio/lpd433/rfswitch/</id> <link href="https://leap.tardate.com/radio/lpd433/rfswitch/"/> <g:image_link>https://leap.tardate.com/radio/lpd433/rfswitch/assets/rfswitch_build.jpg</g:image_link> <updated>2019-09-22T13:54:58Z</updated> <title>#063 RF Switch</title> <summary>simple remote control switch with 433Mhz transmitter/receiver and some analog signal processing</summary> <content type="html"><div><p>simple remote control switch with 433Mhz transmitter/receiver and some analog signal processing</p><img src="https://leap.tardate.com/radio/lpd433/rfswitch/assets/rfswitch_build.jpg" /></div></content> <category term="Radio"/> <category term="OpAmp"/> <category term="LPD433"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitallogic/srlatchflipper/</id> <link href="https://leap.tardate.com/electronics101/digitallogic/srlatchflipper/"/> <g:image_link>https://leap.tardate.com/electronics101/digitallogic/srlatchflipper/assets/srlatchflipper_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#062 SR Latch Flipper</title> <summary>Set/Reset latch with BJTs, controlled and monitored by an Arduino</summary> <content type="html"><div><p>Set/Reset latch with BJTs, controlled and monitored by an Arduino</p><img src="https://leap.tardate.com/electronics101/digitallogic/srlatchflipper/assets/srlatchflipper_build.jpg" /></div></content> <category term="Digital Logic"/> <category term="BJT"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/digitallogic/srlatch/</id> <link href="https://leap.tardate.com/electronics101/digitallogic/srlatch/"/> <g:image_link>https://leap.tardate.com/electronics101/digitallogic/srlatch/assets/srlatch_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#061 SR Latch</title> <summary>Set/Reset latch with BJTs</summary> <content type="html"><div><p>Set/Reset latch with BJTs</p><img src="https://leap.tardate.com/electronics101/digitallogic/srlatch/assets/srlatch_build.jpg" /></div></content> <category term="Digital Logic"/> <category term="BJT"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/breadboard5v/</id> <link href="https://leap.tardate.com/electronics101/power/breadboard5v/"/> <g:image_link>https://leap.tardate.com/electronics101/power/breadboard5v/assets/breadboard5v_build.jpg</g:image_link> <updated>2019-12-14T09:56:20Z</updated> <title>#060 5V Breadboard Regulator</title> <summary>an LM7805 5V regulated power supply on breadboard-compatible protoboard</summary> <content type="html"><div><p>an LM7805 5V regulated power supply on breadboard-compatible protoboard</p><img src="https://leap.tardate.com/electronics101/power/breadboard5v/assets/breadboard5v_build.jpg" /></div></content> <category term="Breadboard Bling"/> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/twotonedoorbell/</id> <link href="https://leap.tardate.com/electronics101/555timer/twotonedoorbell/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/twotonedoorbell/assets/twotonedoorbell_build.jpg</g:image_link> <updated>2019-09-23T14:03:02Z</updated> <title>#059 Two-tone Doorbell</title> <summary>basic two-tone doorbell using a 555 timer oscillator, with n-channel FET for power conservation</summary> <content type="html"><div><p>basic two-tone doorbell using a 555 timer oscillator, with n-channel FET for power conservation</p><img src="https://leap.tardate.com/electronics101/555timer/twotonedoorbell/assets/twotonedoorbell_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/playground/led4digit7segment/</id> <link href="https://leap.tardate.com/playground/led4digit7segment/"/> <g:image_link>https://leap.tardate.com/playground/led4digit7segment/assets/led4digit7segment_build.jpg</g:image_link> <updated>2020-10-02T13:02:32Z</updated> <title>#058 4 Digit 7-Segment LED Displays</title> <summary>overview of driving a 4-digit 7-segment display</summary> <content type="html"><div><p>overview of driving a 4-digit 7-segment display</p><img src="https://leap.tardate.com/playground/led4digit7segment/assets/led4digit7segment_build.jpg" /></div></content> <category term="LED 7-Segment"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/capacitancetester/</id> <link href="https://leap.tardate.com/electronics101/capacitancetester/"/> <g:image_link>https://leap.tardate.com/electronics101/capacitancetester/assets/capacitancetester_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#057 CapacitanceTester</title> <summary>capacitor tester with LCD output</summary> <content type="html"><div><p>capacitor tester with LCD output</p><img src="https://leap.tardate.com/electronics101/capacitancetester/assets/capacitancetester_build.jpg" /></div></content> <category term="LCD"/> <category term="RC"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/servomotors/joystickservocontrol/</id> <link href="https://leap.tardate.com/kinetics/servomotors/joystickservocontrol/"/> <g:image_link>https://leap.tardate.com/kinetics/servomotors/joystickservocontrol/assets/joystickservocontrol_build.jpg</g:image_link> <updated>2021-09-12T08:12:35Z</updated> <title>#056 JoystickServoControl</title> <summary>controlling two SG90 servos with a joystick</summary> <content type="html"><div><p>controlling two SG90 servos with a joystick</p><img src="https://leap.tardate.com/kinetics/servomotors/joystickservocontrol/assets/joystickservocontrol_build.jpg" /></div></content> <category term="Human Input"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/relaycontroltest/</id> <link href="https://leap.tardate.com/playground/relaycontroltest/"/> <g:image_link>https://leap.tardate.com/playground/relaycontroltest/assets/relaycontroltest_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#055 RelayControlTest</title> <summary>quick test to drive a motor with a common relay using NPN switching circuit under Arduino control</summary> <content type="html"><div><p>quick test to drive a motor with a common relay using NPN switching circuit under Arduino control</p><img src="https://leap.tardate.com/playground/relaycontroltest/assets/relaycontroltest_build.jpg" /></div></content> <category term="Servo"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/relaymoduletest/</id> <link href="https://leap.tardate.com/playground/relaymoduletest/"/> <g:image_link>https://leap.tardate.com/playground/relaymoduletest/assets/relaymoduletest_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#054 RelayModuleTest</title> <summary>quick test of a common relay board to switch a motor under Arduino control</summary> <content type="html"><div><p>quick test of a common relay board to switch a motor under Arduino control</p><img src="https://leap.tardate.com/playground/relaymoduletest/assets/relaymoduletest_build.jpg" /></div></content> <category term="Servo"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/functiongenerator324/</id> <link href="https://leap.tardate.com/electronics101/functiongenerator324/"/> <g:image_link>https://leap.tardate.com/electronics101/functiongenerator324/assets/functiongenerator324_build.jpg</g:image_link> <updated>2023-09-14T16:38:56Z</updated> <title>#053 LM324 Function Generator</title> <summary>LM324 configured as a low-frequency square, triangle, sine, and cosine function generator</summary> <content type="html"><div><p>LM324 configured as a low-frequency square, triangle, sine, and cosine function generator</p><img src="https://leap.tardate.com/electronics101/functiongenerator324/assets/functiongenerator324_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Oscillators"/> <category term="LM324"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/comparator741/</id> <link href="https://leap.tardate.com/electronics101/comparator741/"/> <g:image_link>https://leap.tardate.com/electronics101/comparator741/assets/comparator741_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#052 Comparator741</title> <summary>demo LM741 OpAmp comparator mode (with PWM-to-analog side-topic)</summary> <content type="html"><div><p>demo LM741 OpAmp comparator mode (with PWM-to-analog side-topic)</p><img src="https://leap.tardate.com/electronics101/comparator741/assets/comparator741_build.jpg" /></div></content> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/playground/jarabetapatio/</id> <link href="https://leap.tardate.com/playground/jarabetapatio/"/> <g:image_link>https://leap.tardate.com/playground/jarabetapatio/assets/jarabetapatio_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#051 El Jarabe Tapatío</title> <summary>play The Mexican Hat Dance on a piezo buzzer with LM 386 amplification</summary> <content type="html"><div><p>play The Mexican Hat Dance on a piezo buzzer with LM 386 amplification</p><img src="https://leap.tardate.com/playground/jarabetapatio/assets/jarabetapatio_build.jpg" /></div></content> <category term="Audio"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/girabot/</id> <link href="https://leap.tardate.com/girabot/"/> <g:image_link>https://leap.tardate.com/girabot/assets/girabot_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#050 Girabot</title> <summary>EE40LX Electronic Interfaces robot project</summary> <content type="html"><div><p>EE40LX Electronic Interfaces robot project</p><img src="https://leap.tardate.com/girabot/assets/girabot_build.jpg" /></div></content> <category term="Sensors"/> <category term="OpAmp"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/bjtrcoscillator/</id> <link href="https://leap.tardate.com/electronics101/oscillators/bjtrcoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/bjtrcoscillator/assets/bjtrcoscillator_build.jpg</g:image_link> <updated>2019-06-01T02:54:20Z</updated> <title>#049 BJT RC Oscillator</title> <summary>Demonstrates a simple RC/transistor astable multivibrator</summary> <content type="html"><div><p>Demonstrates a simple RC/transistor astable multivibrator</p><img src="https://leap.tardate.com/electronics101/oscillators/bjtrcoscillator/assets/bjtrcoscillator_build.jpg" /></div></content> <category term="BJT"/> <category term="RC"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/playground/stereolighttrigger/</id> <link href="https://leap.tardate.com/playground/stereolighttrigger/"/> <g:image_link>https://leap.tardate.com/playground/stereolighttrigger/assets/stereolighttrigger_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#048 StereoLightTrigger</title> <summary>A dual input low-light trigger: demonstrates an interrupt-driven method for an Arduino to respond to LDR light threshold triggers.</summary> <content type="html"><div><p>A dual input low-light trigger: demonstrates an interrupt-driven method for an Arduino to respond to LDR light threshold triggers.</p><img src="https://leap.tardate.com/playground/stereolighttrigger/assets/stereolighttrigger_build.jpg" /></div></content> <category term="Sensors"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ldr/stereotripdetector/</id> <link href="https://leap.tardate.com/electronics101/ldr/stereotripdetector/"/> <g:image_link>https://leap.tardate.com/electronics101/ldr/stereotripdetector/assets/stereotripdetector_build.jpg</g:image_link> <updated>2022-12-21T10:21:30Z</updated> <title>#047 LDR Stereo Trip Detector</title> <summary>demo LM324 OpAmp as threshold trigger for stereo LDR/Wheatstone Bridge sensor</summary> <content type="html"><div><p>demo LM324 OpAmp as threshold trigger for stereo LDR/Wheatstone Bridge sensor</p><img src="https://leap.tardate.com/electronics101/ldr/stereotripdetector/assets/stereotripdetector_build.jpg" /></div></content> <category term="OpAmp"/> </entry> <entry> <id>https://leap.tardate.com/playground/motorcontrolpwm/</id> <link href="https://leap.tardate.com/playground/motorcontrolpwm/"/> <g:image_link>https://leap.tardate.com/playground/motorcontrolpwm/assets/motorcontrolpwm_build.jpg</g:image_link> <updated>2020-11-20T14:41:46Z</updated> <title>#046 PWM Motor Control</title> <summary>Testing DC motor speed control using an Arduino-generated PWM signal</summary> <content type="html"><div><p>Testing DC motor speed control using an Arduino-generated PWM signal</p><img src="https://leap.tardate.com/playground/motorcontrolpwm/assets/motorcontrolpwm_build.jpg" /></div></content> <category term="Motors"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/simplesiren/</id> <link href="https://leap.tardate.com/electronics101/555timer/simplesiren/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/simplesiren/assets/simplesiren_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#045 Simple Siren</title> <summary>classic timer circuit producing a two-tone oscillation</summary> <content type="html"><div><p>classic timer circuit producing a two-tone oscillation</p><img src="https://leap.tardate.com/electronics101/555timer/simplesiren/assets/simplesiren_build.jpg" /></div></content> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/simplechime/</id> <link href="https://leap.tardate.com/electronics101/555timer/simplechime/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/simplechime/assets/simplechime_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#044 Simple Chime</title> <summary>play a sound for a fixed duration when a button is pressed</summary> <content type="html"><div><p>play a sound for a fixed duration when a button is pressed</p><img src="https://leap.tardate.com/electronics101/555timer/simplechime/assets/simplechime_build.jpg" /></div></content> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/playground/hitthelights/</id> <link href="https://leap.tardate.com/playground/hitthelights/"/> <g:image_link>https://leap.tardate.com/playground/hitthelights/assets/hitthelights_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#043 HitTheLights</title> <summary>simple LED game with LCD output and interrupt-driven button input</summary> <content type="html"><div><p>simple LED game with LCD output and interrupt-driven button input</p><img src="https://leap.tardate.com/playground/hitthelights/assets/hitthelights_build.jpg" /></div></content> <category term="LCD"/> <category term="Human Input"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/servomotors/servotest/</id> <link href="https://leap.tardate.com/kinetics/servomotors/servotest/"/> <g:image_link>https://leap.tardate.com/kinetics/servomotors/servotest/assets/servotest_build.jpg</g:image_link> <updated>2021-09-12T08:12:35Z</updated> <title>#042 ServoTest</title> <summary>test the positioning accuracy of an SG90 servo motor driven by an Arduino</summary> <content type="html"><div><p>test the positioning accuracy of an SG90 servo motor driven by an Arduino</p><img src="https://leap.tardate.com/kinetics/servomotors/servotest/assets/servotest_build.jpg" /></div></content> <category term="Servo"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/shifty/</id> <link href="https://leap.tardate.com/playground/shifty/"/> <g:image_link>https://leap.tardate.com/playground/shifty/assets/shifty_build.jpg</g:image_link> <updated>2017-05-24T15:39:45Z</updated> <title>#041 Shifty</title> <summary>drive 8 LEDs with 3 pins using a 74HC595 shift register</summary> <content type="html"><div><p>drive 8 LEDs with 3 pins using a 74HC595 shift register</p><img src="https://leap.tardate.com/playground/shifty/assets/shifty_build.jpg" /></div></content> <category term="LED"/> <category term="CMOS/TTL"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/meledy/</id> <link href="https://leap.tardate.com/electronics101/meledy/"/> <g:image_link>https://leap.tardate.com/electronics101/meledy/assets/meledy_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#040 MeLEDy</title> <summary>use an electret microphone to light a series of LEDs in proportion to volume</summary> <content type="html"><div><p>use an electret microphone to light a series of LEDs in proportion to volume</p><img src="https://leap.tardate.com/electronics101/meledy/assets/meledy_build.jpg" /></div></content> <category term="Audio"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/astableopamp/</id> <link href="https://leap.tardate.com/electronics101/oscillators/astableopamp/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/astableopamp/assets/astableopamp_build.jpg</g:image_link> <updated>2017-08-19T11:25:32Z</updated> <title>#039 Square Wave - LM324</title> <summary>using an LM324 OpAmp to generate a square wave (astable opamp oscillator)</summary> <content type="html"><div><p>using an LM324 OpAmp to generate a square wave (astable opamp oscillator)</p><img src="https://leap.tardate.com/electronics101/oscillators/astableopamp/assets/astableopamp_build.jpg" /></div></content> <category term="OpAmp"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/playground/electretadc/</id> <link href="https://leap.tardate.com/playground/electretadc/"/> <g:image_link>https://leap.tardate.com/playground/electretadc/assets/electretadc_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#038 ElectretADC</title> <summary>convert electret signal to a full range analog input with an LM324 preamp and plot the raw and aplified signals</summary> <content type="html"><div><p>convert electret signal to a full range analog input with an LM324 preamp and plot the raw and aplified signals</p><img src="https://leap.tardate.com/playground/electretadc/assets/electretadc_build.jpg" /></div></content> <category term="Audio"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/electrettrigger/</id> <link href="https://leap.tardate.com/playground/electrettrigger/"/> <g:image_link>https://leap.tardate.com/playground/electrettrigger/assets/electrettrigger_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#037 ElectretTrigger</title> <summary>uses an electret microphone and LM324 amplifier to trigger action when over audio threshold</summary> <content type="html"><div><p>uses an electret microphone and LM324 amplifier to trigger action when over audio threshold</p><img src="https://leap.tardate.com/playground/electrettrigger/assets/electrettrigger_build.jpg" /></div></content> <category term="Sensors"/> <category term="Audio"/> <category term="OpAmp"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/noninverting324/</id> <link href="https://leap.tardate.com/electronics101/noninverting324/"/> <g:image_link>https://leap.tardate.com/electronics101/noninverting324/assets/noninverting324_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#036 LM324 OpAmp Non-inverting DC Gain</title> <summary>demo LM324 OpAmp non-inverting DC gain mode</summary> <content type="html"><div><p>demo LM324 OpAmp non-inverting DC gain mode</p><img src="https://leap.tardate.com/electronics101/noninverting324/assets/noninverting324_build.jpg" /></div></content> <category term="OpAmp"/> <category term="LM324"/> </entry> <entry> <id>https://leap.tardate.com/playground/rangefinder/</id> <link href="https://leap.tardate.com/playground/rangefinder/"/> <g:image_link>https://leap.tardate.com/playground/rangefinder/assets/rangefinder_build.jpg</g:image_link> <updated>2018-04-15T01:28:17Z</updated> <title>#035 RangeFinder</title> <summary>proximity/distance measurement with an HC-SR04 untrasonic ranging module</summary> <content type="html"><div><p>proximity/distance measurement with an HC-SR04 untrasonic ranging module</p><img src="https://leap.tardate.com/playground/rangefinder/assets/rangefinder_build.jpg" /></div></content> <category term="Sensors"/> <category term="Arduino"/> <category term="HC-SR04"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/ldr/comparator/</id> <link href="https://leap.tardate.com/electronics101/ldr/comparator/"/> <g:image_link>https://leap.tardate.com/electronics101/ldr/comparator/assets/comparator_build.jpg</g:image_link> <updated>2022-12-21T10:21:30Z</updated> <title>#034 LDR Comparator</title> <summary>low-light/proximity Trip Detector demonstration using LM324 and LDR/Wheatstone Bridge sensor</summary> <content type="html"><div><p>low-light/proximity Trip Detector demonstration using LM324 and LDR/Wheatstone Bridge sensor</p><img src="https://leap.tardate.com/electronics101/ldr/comparator/assets/comparator_build.jpg" /></div></content> <category term="Sensors"/> <category term="OpAmp"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/switchpnp/</id> <link href="https://leap.tardate.com/electronics101/switchpnp/"/> <g:image_link>https://leap.tardate.com/electronics101/switchpnp/assets/switchpnp_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#033 Switch - PNP</title> <summary>small-signal digital switch with PNP BJT</summary> <content type="html"><div><p>small-signal digital switch with PNP BJT</p><img src="https://leap.tardate.com/electronics101/switchpnp/assets/switchpnp_build.jpg" /></div></content> <category term="BJT"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/switchnpn/</id> <link href="https://leap.tardate.com/electronics101/switchnpn/"/> <g:image_link>https://leap.tardate.com/electronics101/switchnpn/assets/switchnpn_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#032 Switch - NPN</title> <summary>small-signal digital switch with NPN BJT</summary> <content type="html"><div><p>small-signal digital switch with NPN BJT</p><img src="https://leap.tardate.com/electronics101/switchnpn/assets/switchnpn_build.jpg" /></div></content> <category term="BJT"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/trianglewavegen/</id> <link href="https://leap.tardate.com/electronics101/555timer/trianglewavegen/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/trianglewavegen/assets/trianglewavegen_build.jpg</g:image_link> <updated>2017-05-22T12:36:50Z</updated> <title>#031 Triangle Wave - 555</title> <summary>generate a triangle wave with 555 timer astable oscillator and RC integrator</summary> <content type="html"><div><p>generate a triangle wave with 555 timer astable oscillator and RC integrator</p><img src="https://leap.tardate.com/electronics101/555timer/trianglewavegen/assets/trianglewavegen_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/playground/blinkprecision/</id> <link href="https://leap.tardate.com/playground/blinkprecision/"/> <g:image_link>https://leap.tardate.com/playground/blinkprecision/assets/blinkprecision_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#030 BlinkPrecision</title> <summary>use a timer to perform a function on a precise schedule</summary> <content type="html"><div><p>use a timer to perform a function on a precise schedule</p><img src="https://leap.tardate.com/playground/blinkprecision/assets/blinkprecision_build.jpg" /></div></content> <category term="LED"/> <category term="Timing"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/linearregulators/zener/</id> <link href="https://leap.tardate.com/electronics101/power/linearregulators/zener/"/> <g:image_link>https://leap.tardate.com/electronics101/power/linearregulators/zener/assets/zener_build.jpg</g:image_link> <updated>2021-07-20T17:12:56Z</updated> <title>#029 Zener Regulator</title> <summary>demonstrates using a 1N4733 Zener diode as a 5V regulator, using an Arduino to measure the voltage supply and plot the results with Processing</summary> <content type="html"><div><p>demonstrates using a 1N4733 Zener diode as a 5V regulator, using an Arduino to measure the voltage supply and plot the results with Processing</p><img src="https://leap.tardate.com/electronics101/power/linearregulators/zener/assets/zener_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/mb102breadboardpowersupply/</id> <link href="https://leap.tardate.com/electronics101/power/mb102breadboardpowersupply/"/> <g:image_link>https://leap.tardate.com/electronics101/power/mb102breadboardpowersupply/assets/mb102breadboardpowersupply_build.jpg</g:image_link> <updated>2024-04-10T06:15:32Z</updated> <title>#028 MB102 3.3/5V Breadboard Power Supply</title> <summary>demo and test a commercial 3.3/5V MB102 breadboard power supply unit</summary> <content type="html"><div><p>demo and test a commercial 3.3/5V MB102 breadboard power supply unit</p><img src="https://leap.tardate.com/electronics101/power/mb102breadboardpowersupply/assets/mb102breadboardpowersupply_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/linearregulators/lm7805/</id> <link href="https://leap.tardate.com/electronics101/power/linearregulators/lm7805/"/> <g:image_link>https://leap.tardate.com/electronics101/power/linearregulators/lm7805/assets/lm7805_build.jpg</g:image_link> <updated>2021-07-20T17:12:56Z</updated> <title>#027 LM7805 Regulator</title> <summary>demonstrates the LM7805 5V regulator, using an Arduino to measure the voltage supply and plot the results with Processing</summary> <content type="html"><div><p>demonstrates the LM7805 5V regulator, using an Arduino to measure the voltage supply and plot the results with Processing</p><img src="https://leap.tardate.com/electronics101/power/linearregulators/lm7805/assets/lm7805_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/power/linearregulators/lm317/</id> <link href="https://leap.tardate.com/electronics101/power/linearregulators/lm317/"/> <g:image_link>https://leap.tardate.com/electronics101/power/linearregulators/lm317/assets/lm317_build.jpg</g:image_link> <updated>2021-07-20T17:12:56Z</updated> <title>#026 LM317 Adjustable Regulator</title> <summary>Demonstrates the LM317 voltage regulator, using an Arduino to measure the voltage supply and plot the results with Processing</summary> <content type="html"><div><p>Demonstrates the LM317 voltage regulator, using an Arduino to measure the voltage supply and plot the results with Processing</p><img src="https://leap.tardate.com/electronics101/power/linearregulators/lm317/assets/lm317_build.jpg" /></div></content> <category term="Power"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/quadlatch/</id> <link href="https://leap.tardate.com/electronics101/quadlatch/"/> <g:image_link>https://leap.tardate.com/electronics101/quadlatch/assets/quadlatch_build.jpg</g:image_link> <updated>2017-05-24T15:39:45Z</updated> <title>#025 Quad Latch</title> <summary>graph the basic operation of the 74LS75 4-bit bistable latch</summary> <content type="html"><div><p>graph the basic operation of the 74LS75 4-bit bistable latch</p><img src="https://leap.tardate.com/electronics101/quadlatch/assets/quadlatch_build.jpg" /></div></content> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/resistortransistorlogic/and/</id> <link href="https://leap.tardate.com/electronics101/resistortransistorlogic/and/"/> <g:image_link>https://leap.tardate.com/electronics101/resistortransistorlogic/and/assets/and_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#024 AND Gate with Resistor-Transistor Logic</title> <summary>test the basic resistor-transistor logic AND gate </summary> <content type="html"><div><p>test the basic resistor-transistor logic AND gate </p><img src="https://leap.tardate.com/electronics101/resistortransistorlogic/and/assets/and_build.jpg" /></div></content> <category term="BJT"/> <category term="RTL"/> <category term="Digital Logic"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/resistortransistorlogic/nand/</id> <link href="https://leap.tardate.com/electronics101/resistortransistorlogic/nand/"/> <g:image_link>https://leap.tardate.com/electronics101/resistortransistorlogic/nand/assets/nand_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#023 NAND Gate with Resistor-Transistor Logic</title> <summary>test the basic resistor-transistor logic NAND gate </summary> <content type="html"><div><p>test the basic resistor-transistor logic NAND gate </p><img src="https://leap.tardate.com/electronics101/resistortransistorlogic/nand/assets/nand_build.jpg" /></div></content> <category term="BJT"/> <category term="RTL"/> <category term="Digital Logic"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/oscillators/schmittoscillator/</id> <link href="https://leap.tardate.com/electronics101/oscillators/schmittoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/oscillators/schmittoscillator/assets/schmittoscillator_build.jpg</g:image_link> <updated>2022-09-16T13:35:07Z</updated> <title>#022 Square Wave - Schmitt Oscillator</title> <summary>using an 74LS14 Hex Inverter with Schmitt Trigger Inputs to generate a square wave</summary> <content type="html"><div><p>using an 74LS14 Hex Inverter with Schmitt Trigger Inputs to generate a square wave</p><img src="https://leap.tardate.com/electronics101/oscillators/schmittoscillator/assets/schmittoscillator_build.jpg" /></div></content> <category term="CMOS/TTL"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/schmittinverter/</id> <link href="https://leap.tardate.com/electronics101/schmittinverter/"/> <g:image_link>https://leap.tardate.com/electronics101/schmittinverter/assets/schmittinverter_build.jpg</g:image_link> <updated>2017-05-24T15:39:45Z</updated> <title>#021 Schmitt Inverter</title> <summary>graph the basic operation of the 74LS14 Hex Inverter with Schmitt Trigger Inputs</summary> <content type="html"><div><p>graph the basic operation of the 74LS14 Hex Inverter with Schmitt Trigger Inputs</p><img src="https://leap.tardate.com/electronics101/schmittinverter/assets/schmittinverter_build.jpg" /></div></content> <category term="CMOS/TTL"/> </entry> <entry> <id>https://leap.tardate.com/playground/internals/</id> <link href="https://leap.tardate.com/playground/internals/"/> <g:image_link>https://leap.tardate.com/playground/internals/assets/internals_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#020 Arduino Internals</title> <summary>report on Arduino Board internals</summary> <content type="html"><div><p>report on Arduino Board internals</p><img src="https://leap.tardate.com/playground/internals/assets/internals_build.jpg" /></div></content> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/popcorn/</id> <link href="https://leap.tardate.com/playground/popcorn/"/> <g:image_link>https://leap.tardate.com/playground/popcorn/assets/popcorn_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#019 Popcorn</title> <summary>How to make a piezo buzzer even more annoying? Make it play popcorn!</summary> <content type="html"><div><p>How to make a piezo buzzer even more annoying? Make it play popcorn!</p><img src="https://leap.tardate.com/playground/popcorn/assets/popcorn_build.jpg" /></div></content> <category term="Audio"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/fretboard/</id> <link href="https://leap.tardate.com/fretboard/"/> <g:image_link>https://leap.tardate.com/fretboard/assets/fretboard_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#018 FretBoard</title> <summary>a multi-project build status indicator, that pulls software build status from the net and animates the status of up to 24 projects with an LED array</summary> <content type="html"><div><p>a multi-project build status indicator, that pulls software build status from the net and animates the status of up to 24 projects with an LED array</p><img src="https://leap.tardate.com/fretboard/assets/fretboard_build.jpg" /></div></content> <category term="LED Array"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/monostable/</id> <link href="https://leap.tardate.com/electronics101/555timer/monostable/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/monostable/assets/monostable_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#017 555 Timer Monostable Demo</title> <summary>basic monostable mode using an Arduino and processing to plot the output</summary> <content type="html"><div><p>basic monostable mode using an Arduino and processing to plot the output</p><img src="https://leap.tardate.com/electronics101/555timer/monostable/assets/monostable_build.jpg" /></div></content> <category term="555 Timer"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/555timer/astableoscillator/</id> <link href="https://leap.tardate.com/electronics101/555timer/astableoscillator/"/> <g:image_link>https://leap.tardate.com/electronics101/555timer/astableoscillator/assets/astableoscillator_build.jpg</g:image_link> <updated>2017-05-22T12:36:50Z</updated> <title>#016 Square Wave - 555</title> <summary>using a 555 timer as an astable oscillator to generate a square wave and an Arduino and processing to plot the output</summary> <content type="html"><div><p>using a 555 timer as an astable oscillator to generate a square wave and an Arduino and processing to plot the output</p><img src="https://leap.tardate.com/electronics101/555timer/astableoscillator/assets/astableoscillator_build.jpg" /></div></content> <category term="555 Timer"/> <category term="Oscillators"/> </entry> <entry> <id>https://leap.tardate.com/ledarraydemos/striptease/</id> <link href="https://leap.tardate.com/ledarraydemos/striptease/"/> <g:image_link>https://leap.tardate.com/ledarraydemos/striptease/assets/striptease_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#015 StripTease</title> <summary>demo a range of effects on the LED strip</summary> <content type="html"><div><p>demo a range of effects on the LED strip</p><img src="https://leap.tardate.com/ledarraydemos/striptease/assets/striptease_build.jpg" /></div></content> <category term="LED Array"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/ledarraydemos/asyncledstripeffects/</id> <link href="https://leap.tardate.com/ledarraydemos/asyncledstripeffects/"/> <g:image_link>https://leap.tardate.com/ledarraydemos/asyncledstripeffects/assets/asyncledstripeffects_build.jpg</g:image_link> <updated>2021-03-09T16:33:19Z</updated> <title>#014 LED Array Async Effects</title> <summary>demo effects on the LED strip driven using timer interrupt</summary> <content type="html"><div><p>demo effects on the LED strip driven using timer interrupt</p><img src="https://leap.tardate.com/ledarraydemos/asyncledstripeffects/assets/asyncledstripeffects_build.jpg" /></div></content> <category term="LED Array"/> <category term="Timing"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/resistortransistorlogic/not/</id> <link href="https://leap.tardate.com/electronics101/resistortransistorlogic/not/"/> <g:image_link>https://leap.tardate.com/electronics101/resistortransistorlogic/not/assets/not_build.jpg</g:image_link> <updated>2020-09-20T04:39:01Z</updated> <title>#013 NOT Gate with Resistor-Transistor Logic</title> <summary>test the basic resistor-transistor logic NOT gate (Inverter)</summary> <content type="html"><div><p>test the basic resistor-transistor logic NOT gate (Inverter)</p><img src="https://leap.tardate.com/electronics101/resistortransistorlogic/not/assets/not_build.jpg" /></div></content> <category term="BJT"/> <category term="RTL"/> <category term="Digital Logic"/> </entry> <entry> <id>https://leap.tardate.com/electronics101/capacitorial/</id> <link href="https://leap.tardate.com/electronics101/capacitorial/"/> <g:image_link>https://leap.tardate.com/electronics101/capacitorial/assets/capacitorial_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#012 Capacitorial</title> <summary>graphing capacitor discharge with Processing</summary> <content type="html"><div><p>graphing capacitor discharge with Processing</p><img src="https://leap.tardate.com/electronics101/capacitorial/assets/capacitorial_build.jpg" /></div></content> <category term="RC"/> </entry> <entry> <id>https://leap.tardate.com/kinetics/steppermotors/28byj48/x113647stepperlibrary/</id> <link href="https://leap.tardate.com/kinetics/steppermotors/28byj48/x113647stepperlibrary/"/> <g:image_link>https://leap.tardate.com/kinetics/steppermotors/28byj48/x113647stepperlibrary/assets/x113647stepperlibrary_build.jpg</g:image_link> <updated>2018-11-04T15:18:24Z</updated> <title>#011 X113647StepperLibrary</title> <summary>a standard Stepper-compatible Arduino library that supports half-stepping the 28BYJ-48 unipolar stepper motor with a ULN2003A/X113647 Stepper Motor Driver Board</summary> <content type="html"><div><p>a standard Stepper-compatible Arduino library that supports half-stepping the 28BYJ-48 unipolar stepper motor with a ULN2003A/X113647 Stepper Motor Driver Board</p><img src="https://leap.tardate.com/kinetics/steppermotors/28byj48/x113647stepperlibrary/assets/x113647stepperlibrary_build.jpg" /></div></content> <category term="Stepper"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/lightornot/</id> <link href="https://leap.tardate.com/playground/lightornot/"/> <g:image_link>https://leap.tardate.com/playground/lightornot/assets/lightornot_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#010 LightOrNot</title> <summary>uses an LDR to adjust the blink rate of an LED</summary> <content type="html"><div><p>uses an LDR to adjust the blink rate of an LED</p><img src="https://leap.tardate.com/playground/lightornot/assets/lightornot_build.jpg" /></div></content> <category term="Sensors"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/blink/</id> <link href="https://leap.tardate.com/playground/blink/"/> <g:image_link>https://leap.tardate.com/playground/blink/assets/blink_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#009 Blink</title> <summary>the simplest blinking LED, with some electrical measurements thrown in</summary> <content type="html"><div><p>the simplest blinking LED, with some electrical measurements thrown in</p><img src="https://leap.tardate.com/playground/blink/assets/blink_build.jpg" /></div></content> <category term="LED"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/ledarraydemos/rgbcalibrate/</id> <link href="https://leap.tardate.com/ledarraydemos/rgbcalibrate/"/> <g:image_link>https://leap.tardate.com/ledarraydemos/rgbcalibrate/assets/rgbcalibrate_build.jpg</g:image_link> <updated>2021-03-09T16:33:19Z</updated> <title>#008 LED Array RGB Calibration</title> <summary>quick test to make sure LEDs are correctly addressable and their color can be set correctly</summary> <content type="html"><div><p>quick test to make sure LEDs are correctly addressable and their color can be set correctly</p><img src="https://leap.tardate.com/ledarraydemos/rgbcalibrate/assets/rgbcalibrate_build.jpg" /></div></content> <category term="LED Array"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/ledarraydemos/</id> <link href="https://leap.tardate.com/ledarraydemos/"/> <g:image_link>https://leap.tardate.com/ledarraydemos/assets/ledarraydemos_build.jpg</g:image_link> <updated>2021-03-09T16:33:19Z</updated> <title>#007 Programmable LED Arrays</title> <summary>Intro and Setup.. I bought some WS2811-based LED Strips with a specific project in mind. But first, need to get them working...</summary> <content type="html"><div><p>Intro and Setup.. I bought some WS2811-based LED Strips with a specific project in mind. But first, need to get them working...</p><img src="https://leap.tardate.com/ledarraydemos/assets/ledarraydemos_build.jpg" /></div></content> <category term="LED Array"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/betterwithbacon/</id> <link href="https://leap.tardate.com/playground/betterwithbacon/"/> <g:image_link>https://leap.tardate.com/playground/betterwithbacon/assets/betterwithbacon_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#006 It's Better With Bacon</title> <summary>simple LCD test</summary> <content type="html"><div><p>simple LCD test</p><img src="https://leap.tardate.com/playground/betterwithbacon/assets/betterwithbacon_build.jpg" /></div></content> <category term="LCD"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/heartquotes/</id> <link href="https://leap.tardate.com/playground/heartquotes/"/> <g:image_link>https://leap.tardate.com/playground/heartquotes/assets/heartquotes_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#005 HeartQuotes</title> <summary>press a button to get a quote from the net and display on an LCD</summary> <content type="html"><div><p>press a button to get a quote from the net and display on an LCD</p><img src="https://leap.tardate.com/playground/heartquotes/assets/heartquotes_build.jpg" /></div></content> <category term="LCD"/> <category term="Ethernet"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/pushbuttonled/</id> <link href="https://leap.tardate.com/playground/pushbuttonled/"/> <g:image_link>https://leap.tardate.com/playground/pushbuttonled/assets/pushbuttonled_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#004 Pushbutton LED switch</title> <summary>Momentary push button switch is used to toggle the LED on and off</summary> <content type="html"><div><p>Momentary push button switch is used to toggle the LED on and off</p><img src="https://leap.tardate.com/playground/pushbuttonled/assets/pushbuttonled_build.jpg" /></div></content> <category term="LED"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/ledchaser/</id> <link href="https://leap.tardate.com/playground/ledchaser/"/> <g:image_link>https://leap.tardate.com/playground/ledchaser/assets/ledchaser_build.jpg</g:image_link> <updated>2021-03-09T16:33:19Z</updated> <title>#003 LED Chaser</title> <summary>blinks a series of 12 LEDs in a coninuous loop</summary> <content type="html"><div><p>blinks a series of 12 LEDs in a coninuous loop</p><img src="https://leap.tardate.com/playground/ledchaser/assets/ledchaser_build.jpg" /></div></content> <category term="LED"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/variableled/</id> <link href="https://leap.tardate.com/playground/variableled/"/> <g:image_link>https://leap.tardate.com/playground/variableled/assets/variableled_build.jpg</g:image_link> <updated>2016-06-19T14:13:24Z</updated> <title>#002 Variable LED brightness with PWM</title> <summary>variable resistor is used to control the brightness of an LED with PWM</summary> <content type="html"><div><p>variable resistor is used to control the brightness of an LED with PWM</p><img src="https://leap.tardate.com/playground/variableled/assets/variableled_build.jpg" /></div></content> <category term="LED"/> <category term="Arduino"/> </entry> <entry> <id>https://leap.tardate.com/playground/led7segment/directdrive/</id> <link href="https://leap.tardate.com/playground/led7segment/directdrive/"/> <g:image_link>https://leap.tardate.com/playground/led7segment/directdrive/assets/directdrive_build.jpg</g:image_link> <updated>2020-10-02T13:02:32Z</updated> <title>#001 7-Segment Direct Drive</title> <summary>test direct control of a 7-segment common-cathode LED display, performing a countdown from 9 to 0</summary> <content type="html"><div><p>test direct control of a 7-segment common-cathode LED display, performing a countdown from 9 to 0</p><img src="https://leap.tardate.com/playground/led7segment/directdrive/assets/directdrive_build.jpg" /></div></content> <category term="LED"/> <category term="LED 7-Segment"/> <category term="Arduino"/> </entry></feed> If you would like to create a banner that links to this page (i.e. this validation result), do the following:
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