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<pre spellcheck="false" tabindex="0"> {{ Reads 2 axis joystick,
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<?xml version="1.0" encoding="utf-8"?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom"> <channel> <title>Robotics — Parallax Forums</title> <link>https://forums.parallax.com/</link> <pubDate>Tue, 11 Mar 2025 11:19:15 +0000</pubDate> <language>en</language> <description>Robotics — Parallax Forums</description> <atom:link href="https://forums.parallax.com/categories/robotics/feed.rss" rel="self" type="application/rss+xml"/> <item> <title>BoeBot has some Competition</title> <link>https://forums.parallax.com/discussion/176119/boebot-has-some-competition</link> <pubDate>Sun, 09 Feb 2025 19:25:35 +0000</pubDate> <category>Robotics</category> <dc:creator>erco</dc:creator> <guid isPermaLink="false">176119@/discussions</guid> <description><![CDATA[<p>WOW! The Chinese DEEP Robotics' Lynx is scary agile. Move over, Boston Dynamics!</p> <p><span data-youtube="youtube-yPFXBLavoro?autoplay=1"><a rel="nofollow" href="https://www.youtube.com/watch?v=yPFXBLavoro"><img src="https://img.youtube.com/vi/yPFXBLavoro/0.jpg" width="640" height="385" border="0" alt="image" /></a></span></p>]]> </description> </item> <item> <title>Next large robot</title> <link>https://forums.parallax.com/discussion/135857/next-large-robot</link> <pubDate>Mon, 14 Nov 2011 14:18:24 +0000</pubDate> <category>Robotics</category> <dc:creator>DiverBob</dc:creator> <guid isPermaLink="false">135857@/discussions</guid> <description><![CDATA[I've started the design work on my next creation which will be a bit different than the last few I've built. This robot will be a Hexapod based on a circular body. Each leg will have 3 drive motors and will use a design similar to the old Odex I (look it up if the name isn't familiar!). All moving parts will be on bearings or bushings, there will be 24 per leg. Linear actuators drive two axis and the third uses a large gear motor.<br /><br />I built a wooden version of one leg to validate the design,clearances and interferences. The CAD drawings were finished last night so the next step is cutting out the aluminum stock. Then it all goes into a CNC mill to make the parts!<br /><br />I'm using Parallax parts as much as possible but some things like the linear actuators were ordered elsewhere. The HB-25 motor controllersl are used to drive the 12 volt motors and 6 custom propellor boards will be used to control the legs. These controllers will be networked together with a master prop board running the show. The goal is to get the mechanical parts for a single leg together before the end of the year and have the basic individual leg programming completed before spring. I expect the final weight of the robot to be around 125 pounds and it will stand up to a maximum of around 4.5 ft.<br /><br />The rest of the legs will follow shortly after that (nice thing about a CNC is that design changes are easy to incorporate and reproduce!). I plan on using Rodney Brooks's behavioral programming ideas for this robot. So I have a lot of studying to do. My big goal is for it to be able to climb stairs with a minimum of input from myself. If I can do that, then it will be a success for me!<br /><br />This is actually my second Hexapod using this basic design but with access to better machining (CNC) capabilities and more modern electronics I expect to have more success this time around (the original was built in the 80's and had very limited capabilities)<br /><br />I'll add photos as I go along if anyone is interested.<br /><br />Bob]]> </description> </item> <item> <title>Beacon (IR?) for simple navigation outdoors</title> <link>https://forums.parallax.com/discussion/176037/beacon-ir-for-simple-navigation-outdoors</link> <pubDate>Mon, 18 Nov 2024 17:13:43 +0000</pubDate> <category>Robotics</category> <dc:creator>banjo</dc:creator> <guid isPermaLink="false">176037@/discussions</guid> <description><![CDATA[<p>TL/DR: Circuit recommendations for simple robot navigation outdoors seeked, perhaps IR.</p> <p>I've been tasked with developing a "working" prototype of a robot navigating on a driveway outdoors. If approved, I'd get paid for the effort, parts, and for the documentation. "Working" = it's more about showing what's possible with fairly low-tech solutions, pitfalls, costs etc., than something that has to be scaled up.</p> <p>In this first version it would be ok to only have the robot going back and forth, more or less in a straight line, in next project I might want to expand it with more advanced sensors and navigation (e.g. GPS-RTK), but that's out of scope right now.</p> <p>In addition to travel back and forth, the robot will be equipped with another separate device that I can disclose first after the project is completed. The other device has its own circuit and power source. Some simple serial communication might be needed between the P1 and the separate device.</p> <p>I've been studying (and discussing with ChatGPT) different options, putting reflective markers on ploughing poles, using long distance RFID-tags, Bluetooth solutions etc. As the first version should be quite simple, I thought about using a IR-beacon (or a few) at the start of the driveway, and equip the robot with two IR-receivers. So the robot would just "home" in on the beacon, similarly as many robot vacuums do.<br />Line-following would probably be even easier than IR, but no permanent painting can be done on the driveway, also snow/ice/uneven asphalt will play a factor.</p> <p>The driveway is ~30 meter x 3 meter wide, so distance might become a problem with IR. I'd though be satisfied with getting 5-10 meter range. Let's assume the robot is only working during dark hours without any light interferences. The weather is a factor, but for this POC I'd ensure no harm will be done to the robot or to the electronics, I'll also 3D-print enclosures for the electronics.</p> <p>The robot I'd use is a Wild Thumper I already own, it's equipped with a Propeller Project Board and working pretty well.</p> <p>Any thoughts on this?</p> <p>If IR is the "easiest", any circuit recommendations for the beacon and for the receivers?</p>]]> </description> </item> <item> <title>joystick driven BOEBot using Xbee in spin</title> <link>https://forums.parallax.com/discussion/159798/joystick-driven-boebot-using-xbee-in-spin</link> <pubDate>Sat, 17 Jan 2015 20:50:51 +0000</pubDate> <category>Robotics</category> <dc:creator>Patrick Lang</dc:creator> <guid isPermaLink="false">159798@/discussions</guid> <description><![CDATA[I had built a propeller BOEBot from the tutorial<a href="http://learn.parallax.com/node/162" rel="nofollow">http://learn.parallax.com/node/162</a>. I then went through the getting started with XBee RF modules text <a href="http://www.parallax.com/product/32450" rel="nofollow">http://www.parallax.com/product/32450</a> including chapter 7 that uses an mx2125 accelerometer on a board to navigate the robot by tilting the board. When I saw a recent Projects forum post by Vale T. that used a 2 axis joystick to navigate an activity bot with XBee I was wondering If I could do the same with my BOEBot. His code was in c with which I am not familiar. So I thought I would try writing spin code that would accomplish my purpose. The two codes at the end of this post is my attempt. It worked for my BOEBot and should work for an activity BOT also. I mounted the joystick (parallax 27800) on an activity board but it should work on any board. If you follow the steps below it should work.<br />1. Build the joystick on an activity board or BOE as shown at: <a href="http://learn.parallax.com/KickStart/27800" rel="nofollow">http://learn.parallax.com/KickStart/27800 </a> and download the propeller demo code there also. Put an XBee on the board containing the joystick being careful to orient it correctly. A small diagram next to the XBEee socket on the board will show how it goes into the socket. Propeller board I/O pin 6 should be connected to XBee pin DI and propeller board I/O pin 7 should connect to XBee pin DO. See image below.<br />[img][/img]<a rel="nofollow" href="/categories/robotics/feed.rss#">Attachment not found.</a><br />2. Run the joystick spin demo and check out the raw RC time values displayed on PST. I ran the demo at: http:// learn.parallax.com/KickStart/27800 which gave me the raw RC time data. It was 0 to 230 with 114 as the value with joystick centered. To get both x axis and y axis readings to agree at these values I played around with the 220 ohm resistors and ending up replacing one with a 100 ohm and the other with a 260 ohm. With these values in mind I defined the cases where the wheels were set to zero (BOE-Bot) as having raw RC values (joystick) between 100 and 130. I set the max wheel values to 64 rather than 100 so the steering in turns was smoother and no “wheelies” happened between forward - backward changes. Make appropriate adjustments to your raw data as needed.<br />3. Build the BOE-Bot and download the code at: [url] <a href="http://learn.parallax.com/node/277[/url]" rel="nofollow">http://learn.parallax.com/node/277[/url]</a> the BOEBot tutorial.<br />4. Insert the XBEE module in the socket on the BOE-Bot, making sure it is oriented correctly ( not pointing the same way as on an activity board). Download XBEE_Object.spin and see diagram and code at: <a href="http://learn.parallax.com/node/362" rel="nofollow">http://learn.parallax.com/node/362</a>XBee tutorial .<br />5.Copy the two code files that follow in this post, paste them into a blank propeller editor window , and save them as spin files in the same folder. That folder must also contain all the files in the OBJ section of both: FullDuplexSerial.spin, RCTime.spin (both in propeller tools), PropellerBoardOfEducation.spin, PropellerBoeBotServoDrive.spin, Timing .spin (these three downloaded from the BOEBot tutorial), and XBee_object.spin ( from XBee tutorial)<br /><br />Here is spin code for navigating the propeller BOEBot with a 2 axis joy stick.<br />This is the spin code for the joy stick board.<pre spellcheck="false" tabindex="0"> {{ Reads 2 axis joystick, sends drive information to bot at address 1.}} CON _clkmode = xtal1 + pll16x _xinfreq = 5_000_000 ' Set pins and Baud rate for XBee comms XB_Rx = 7 ' XBee Dout XB_Tx = 6 ' XBee Din XB_Baud = 9600 MY_Addr = 0 DL_Addr = 1 ' bot address 'Constants used by joystick Object Xout_pin = 0 'Propeller pin joystick X Yout_pin = 1 'Propeller pin joystick Y VAR long drive, UD, LR byte Stack[100] OBJ pst : "FullDuplexSerial" XB : "XBee_Object" rc : "RCTime"PUB Start ' Configure XBee XB.start(XB_Rx, XB_Tx, 0, XB_Baud) ' Initialize comms for XBee XB.AT_Init ' Fast AT updates XB.AT_ConfigVal(string("ATMY"), MY_Addr) XB.AT_ConfigVal(string("ATDL"), DL_Addr) cognew(sendcontrol,@Stack) ' start cog to accept incoming data Pub SendControl drive :=5 repeat rc.rctime(0, 1, @UD) 'RC time joystick x axis rc.rctime(1, 1, @LR) 'RC time joystick y axis IF UD < 100 drive := 1 ' 1 is forward IF UD > 130 drive := 2 '2 is backward IF LR > 130 and UD < 100 drive := 3 '3 is left going forward IF LR < 100 and UD <100 drive := 4 '4 is right going forward IF UD >100 AND UD <130 AND LR > 100 AND LR <130 drive := 5 '5 is stop IF LR > 130 and UD > 130 drive := 6 '6 is left going backward IF LR < 100 and UD > 130 drive := 7 '7 is right going backwards XB.DEC(drive) ' send drive value to BOEBot XB.tx(13)</pre><br />This is the spin code for the propeller BOEBot<pre spellcheck="false" tabindex="0">{{ Accept control information from node 0 joystick to drive propeller BOEbot.}}CON _clkmode = xtal1 + pll16x _xinfreq = 5_000_000 ' I/O and Baud rate for XBee comms XB_Rx = 6 ' XBee Dout XB_Tx = 7 ' XBee Din XB_Baud = 9600 ' XBee addresses DL_Addr = $ffff ' Send data to this address (both controller) MY_Addr = 1 ' This units address ' Servo outputs Left = 14 Right = 15 VAR long drive OBJ XB : "XBee_Object" system : "Propeller Board of Education" servo : "PropBOE-Bot Servo Drive" time : "Timing" PUB Start ' Initialize XBee Comms and stop wheels XB.Start(XB_Rx, XB_Tx ,0, XB_Baud) servo.wheels(0,0) ' Enable XBee for fast configation changes & ' set MY and DL (destinaton) address. XB.AT_Init XB.AT_ConfigVal(string("ATMY"), MY_Addr) XB.AT_ConfigVal(string("ATDL"), DL_Addr) repeat XB.RXFlush 'clear data drive := XB.RXDec 'accept drive values from node 0 case drive 1: 'forward servo.wheels(64, 64) 2: 'reverse servo.wheels(-64, -64) 3: 'right turn going forward servo.wheels(64, 0) 4: 'left turn going forward servo.wheels(0, 64) 5: 'stop servo.wheels(0,0) 6: 'right turn going backwards servo.wheels(-64,0) 7: 'left turn going backwards servo.wheels(0,-64)</pre>]]> </description> </item> <item> <title>Advice for a SumoBot Competition Kit</title> <link>https://forums.parallax.com/discussion/176103/advice-for-a-sumobot-competition-kit</link> <pubDate>Sun, 26 Jan 2025 04:59:14 +0000</pubDate> <category>Robotics</category> <dc:creator>loganb</dc:creator> <guid isPermaLink="false">176103@/discussions</guid> <description><![CDATA[<p>I spend a lot of time with my neighbor's kids, who love martial arts. They're interested in what I do so I thought sumo bots would be perfect.</p> <p>I'm a fan of the Propeller but I see the SumoBot WX Competition Kit 32134 is discontinued. Does anyone have one they could sell me, even if already built? Bonus if you could sell me two WX ESP8266 WiFi modules.</p> <p>There's some inexpensive SumoBot 27402 kits on eBay. Would these be recommended?</p> <p>Thanks and regards,<br />Logan</p>]]> </description> </item> <item> <title>Agnes - A Humanoid Knitting Robot</title> <link>https://forums.parallax.com/discussion/175998/agnes-a-humanoid-knitting-robot</link> <pubDate>Thu, 26 Sep 2024 08:26:05 +0000</pubDate> <category>Robotics</category> <dc:creator>Christof Eb.</dc:creator> <guid isPermaLink="false">175998@/discussions</guid> <description><![CDATA[<p>Hi,<br />a while ago I posted my first <a href="https://forums.parallax.com/discussion/174934/p2-controls-circular-knitting-machine-for-2-color-jacquard-pattern#latest" rel="nofollow">https://forums.parallax.com/discussion/174934/p2-controls-circular-knitting-machine-for-2-color-jacquard-pattern#latest</a></p> <p>I am now in the process of designing my second project about a knitting machine. This machine shall use a very simple (linear) knitting loom and move a needle to make the stitches. For humans the principle of the movements (as used by "Strickliesel" "Kitting Jenny") is simple, children can learn it. But if you do it, you use your eyes a lot, because the yarn is a "living material". The reliability must be high, because knitting does not forgive lost stitches. And the machine must do it blindly.</p> <p>So I was very doubtful, if this can be done at all. <img src="https://forums.parallax.com/resources/emoji/grimace.png" title=":#" alt=":#" height="20" /></p> <p>Then I found "Agnes" at YT, which is for me some kind of proof of concept. (My own design will not be humanoid, will have a linear loom instead of circular one and I hope, that it will be able to knit patterns.) <br />But Agnes is also just admirable. <br /><a href="https://www.youtube.com/watch?app=desktop&v=WUFc2VuAbsk" rel="nofollow">https://www.youtube.com/watch?app=desktop&v=WUFc2VuAbsk</a></p> <p>Close up of the movements:<br /><a href="https://www.youtube.com/watch?app=desktop&v=jCH5n9QhRPU" rel="nofollow">https://www.youtube.com/watch?app=desktop&v=jCH5n9QhRPU</a></p> <p>Enjoy Christof</p>]]> </description> </item> <item> <title>My Advanced Realistic Humanoid Robots Project</title> <link>https://forums.parallax.com/discussion/176010/my-advanced-realistic-humanoid-robots-project</link> <pubDate>Fri, 18 Oct 2024 02:00:15 +0000</pubDate> <category>Robotics</category> <dc:creator>artbyrobot</dc:creator> <guid isPermaLink="false">176010@/discussions</guid> <description><![CDATA[<p>I am building 4 robots presently and using some different techniques for each of them to find out what works best. So far I have Adam, Eve, Abel, and Dinah robots underway. For the framework, Adam is using a fiberglass handmade skeleton which is half done, Abel is using a PVC medical skeleton, Eve is only a CAD model so far, and Dinah is using a hollow steel tubing skeleton.</p> <p>Lately the Dinah robot has been commanding most of my attention. It is one I only recently started up and progress has been fast so far. I started it around the same time TheRobotStudio started his Hope-Lite open source robot and I'm trying to keep up with his pacing for this one. I'm also hoping to implement some of his design strategies into my own. He's a lot more experienced and trained in robotics than me. I'm just a beginner with big ambitions.</p> <p>I want my robots to look realistic and move realistic. I want them to walk, talk, run, do chores, manufacture products, and make more robots.</p> <p>Here's the CAD for the Dinah robot:<br /><img src="https://forums.parallax.com/uploads/editor/6a/dveib97znqhl.jpg" alt="" title="" /></p> <p>The highlighted skeleton is the steel tubing skeleton Dinah will be based on. The gray unhighlighted skeleton is a human style skeleton being used just to ensure all of the steel skeleton hinges are placed accurately. The 3d model in the background is the CAD basemesh of Dinah.</p>]]> </description> </item> <item> <title>Sharp IR Distance Sensor Algorithms</title> <link>https://forums.parallax.com/discussion/165741/sharp-ir-distance-sensor-algorithms</link> <pubDate>Wed, 28 Dec 2016 20:33:23 +0000</pubDate> <category>Robotics</category> <dc:creator>erco</dc:creator> <guid isPermaLink="false">165741@/discussions</guid> <description><![CDATA[I love me some Sharp IR distance sensors, even if their analog output is non-linear. I suspect most of us use these either with lookup tables or in non-precision applications where rough ranges are used. But this morning I found some hardcore equations at <a href="https://www.upgradeindustries.com/product/58/Sharp-10-80cm-Infrared-Distance-Sensor-(GP2Y0A21YK0F)" rel="nofollow">https://www.upgradeindustries.com/product/58/Sharp-10-80cm-Infrared-Distance-Sensor-(GP2Y0A21YK0F)</a> and <a href="https://www.upgradeindustries.com/product/57/Sharp-20-150cm-Infrared-Distance-Sensor-(GP2Y0A02YK0F)" rel="nofollow">https://www.upgradeindustries.com/product/57/Sharp-20-150cm-Infrared-Distance-Sensor-(GP2Y0A02YK0F)</a><br /><br />Depending on your ADC resolution and other factors, you might not need floating-point accuracy to 6-7 sig figs. <img src="https://forums.parallax.com/resources/emoji/smile.png" title=":)" alt=":)" height="20" /><br /><br />]]> </description> </item> <item> <title>Parallax Sale! POUNCE! $99 S3!</title> <link>https://forums.parallax.com/discussion/175738/parallax-sale-pounce-99-s3</link> <pubDate>Thu, 22 Feb 2024 18:11:01 +0000</pubDate> <category>Robotics</category> <dc:creator>erco</dc:creator> <guid isPermaLink="false">175738@/discussions</guid> <description><![CDATA[<p>Krazy Ken has lost his mind! Git 'em while they last, my fellow hoarders!</p> <p>Scribbler 3 just $99! OMG! Gimmeeee! <a href="https://www.parallax.com/product/scribbler-3-s3-robot/" rel="nofollow">https://www.parallax.com/product/scribbler-3-s3-robot/</a></p> <p>Mad sales on XBee, Pi, Ping, Motors!</p> <p><a href="https://www.parallax.com/parallaxs-spring-cleaning-sale-2024" rel="nofollow">https://www.parallax.com/parallaxs-spring-cleaning-sale-2024</a></p> <p><img src="https://forums.parallax.com/uploads/editor/bf/sr6xty6fvhs2.png" alt="" title="" /></p>]]> </description> </item> <item> <title>Clamp arm stepper motor design</title> <link>https://forums.parallax.com/discussion/175820/clamp-arm-stepper-motor-design</link> <pubDate>Thu, 18 Apr 2024 08:13:44 +0000</pubDate> <category>Robotics</category> <dc:creator>frank22</dc:creator> <guid isPermaLink="false">175820@/discussions</guid> <description><![CDATA[<p>Hello there,</p> <p>I'm new to the forum and would like to ask for advice on a project that's ambitious for me. I would like to build a gripper arm which should consist of Nema 17 motors and a Nema 23 motor. The arm should be able to reliably lift 500g with a total length of 50cm at a good speed. The arm itself will be 3D printed from PETG. Now to my question. For the main axis, on which the entire gripper arm hangs, I chose this motor with 20Nm torque: <a href="https://www.oyostepper.de/goods-306-Nema-23-Getriebeschrittmotor-mit-4-1-Planetengetriebe-042-Grad-125Nm-28A-26V-Nema23-Getriebe.html" rel="nofollow">https://www.oyostepper.de/goods-306-Nema-23-Getriebeschrittmotor-mit-4-1-Planetengetriebe-042-Grad-125Nm-28A-26V-Nema23-Getriebe.html</a><br />I need some advice if the power of the engine is sufficient and if the gearbox does not slow it down. Concerns give me the Nema 17 motors (59Ncm), which also bring a little mass. <br />I hope you can help me.</p>]]> </description> </item> <item> <title>Minimalist Bot</title> <link>https://forums.parallax.com/discussion/175816/minimalist-bot</link> <pubDate>Wed, 17 Apr 2024 17:18:17 +0000</pubDate> <category>Robotics</category> <dc:creator>erco</dc:creator> <guid isPermaLink="false">175816@/discussions</guid> <description><![CDATA[<p>About as basic as a bot build gets: servos, lipo, pcb. Likely some foam tape holding it all together.</p> <p>Innovative repurposing of an LED as a front skid. Can we do better?</p> <p><a href="https://www.espruino.com/RobotPCB" rel="nofollow">https://www.espruino.com/RobotPCB</a></p> <p><img src="https://forums.parallax.com/uploads/editor/km/w1md56fqgql9.jpg" alt="" title="" /></p>]]> </description> </item> <item> <title>Scribbler 1 getting started</title> <link>https://forums.parallax.com/discussion/175799/scribbler-1-getting-started</link> <pubDate>Thu, 11 Apr 2024 02:14:13 +0000</pubDate> <category>Robotics</category> <dc:creator>mek363</dc:creator> <guid isPermaLink="false">175799@/discussions</guid> <description><![CDATA[<p>I found a Scribbler 1 at a surplus store and I'm trying to work with it. It turns on and does a few beeps, but the demo modes I read about don't seem to work. I also haven't yet found a user guide, so if anyone could point me to that, I'd appreciate it.</p> <p>Also, I am working on a Mac and I would like to use Python and the <a rel="nofollow" href="https://github.com/jarulsamy/myro">myro library</a> if possible. The myro documentation talks about Bluetooth pairing with the device, but I haven't figured out how do do that or if it is possible yet.</p> <p>Any help would be appreciated!</p>]]> </description> </item> <item> <title>BYD EV does Differential Steering</title> <link>https://forums.parallax.com/discussion/175746/byd-ev-does-differential-steering</link> <pubDate>Mon, 26 Feb 2024 02:44:18 +0000</pubDate> <category>Robotics</category> <dc:creator>erco</dc:creator> <guid isPermaLink="false">175746@/discussions</guid> <description><![CDATA[<p>Check out "dance mode" on Chinese BYD's new $230K YangWang EV supercar. The video starts with lowrider-esque movements but the "magic" starts at 0:29 with spin-in-place differential turning. I hear the tires scrubbing, and I can visualize the associated battery, motor, gear and tire wear. Cringey but impressive from a tech/power perspective. My Corvair can't do that yet.</p> <p></p><div data-tweeturl="https://twitter.com/cyfoxcat/status/1761710157078396970" data-tweetid="1761710157078396970"><a href="https://twitter.com/cyfoxcat/status/1761710157078396970" rel="nofollow">https://twitter.com/cyfoxcat/status/1761710157078396970</a></div>]]> </description> </item> <item> <title>Li-Ion Boe-Bot Rechargeable Power Pack?</title> <link>https://forums.parallax.com/discussion/175720/li-ion-boe-bot-rechargeable-power-pack</link> <pubDate>Sat, 10 Feb 2024 17:01:10 +0000</pubDate> <category>Robotics</category> <dc:creator>tempytempytemp</dc:creator> <guid isPermaLink="false">175720@/discussions</guid> <description><![CDATA[<p>Hello,</p> <p>Parallax used to sell a rechargeable battery pack for the Boe-Bot <a rel="nofollow" href="https://www.jameco.com/z/28988-Parallax-Li-ion-Boe-Bot-Power-Pack-Charger_2153422.html">https://www.jameco.com/z/28988-Parallax-Li-ion-Boe-Bot-Power-Pack-Charger_2153422.html</a>. Unfortunately though it's no longer in production.</p> <p>Is anyone aware of a similar battery pack that is still available today? I've looked around but haven't found anything quite like it.</p>]]> </description> </item> <item> <title>Feb 7=National Love Your Robot Day</title> <link>https://forums.parallax.com/discussion/169708/feb-7-national-love-your-robot-day</link> <pubDate>Fri, 01 Feb 2019 14:36:48 +0000</pubDate> <category>Robotics</category> <dc:creator>erco</dc:creator> <guid isPermaLink="false">169708@/discussions</guid> <description><![CDATA[<a href="https://www.hypable.com/national-love-your-robot-day/" rel="nofollow">https://www.hypable.com/national-love-your-robot-day/</a><br /><br />Just saw this, never heard of it previously. Hopefully they are not promoting anything seedy...<br /><br />So what do we have planned? Less than a week to get our act together!<br /><br />Some robot lovers:<br /><a href="https://barkpost.com/life/roomba-review-dogs/" rel="nofollow">https://barkpost.com/life/roomba-review-dogs/</a><br /><a href="http://robotfanatics.com/" rel="nofollow">http://robotfanatics.com/</a><br /><br /><img src="/discussion/download/125423/robotlove.jpg" alt="robotlove.jpg" />]]> </description> </item> <item> <title>New Dog Robot</title> <link>https://forums.parallax.com/discussion/175682/new-dog-robot</link> <pubDate>Mon, 08 Jan 2024 03:39:34 +0000</pubDate> <category>Robotics</category> <dc:creator>erco</dc:creator> <guid isPermaLink="false">175682@/discussions</guid> <description><![CDATA[<p>Watch out Boston Dynamics, the Chinese Robot Dogs are coming for you! Really impressive. This thing dances up and down stairs, unlike poor Asimo who keeps tumbling down.</p> <p><a href="https://newatlas.com/robotics/unitree-b2-quadruped-robot" rel="nofollow">https://newatlas.com/robotics/unitree-b2-quadruped-robot</a></p> <p><a href="https://www.unitree.com/b2/" rel="nofollow">https://www.unitree.com/b2/</a></p> <p>Video at <a href="https://oss-global-cdn.unitree.com/static/B2%20%E8%8B%B1%E6%96%87%201080p.mp4" rel="nofollow">https://oss-global-cdn.unitree.com/static/B2 英文 1080p.mp4</a></p> <p><img src="https://forums.parallax.com/uploads/editor/eb/drgfzlaxs4hp.png" alt="" title="" /></p> <p>Poor old robot fell on his Asimo.</p> <p><span data-youtube="youtube-OvgLJTpoVc0?autoplay=1"><a rel="nofollow" href="https://www.youtube.com/watch?v=OvgLJTpoVc0"><img src="https://img.youtube.com/vi/OvgLJTpoVc0/0.jpg" width="640" height="385" border="0" alt="image" /></a></span></p>]]> </description> </item> <item> <title>My robot</title> <link>https://forums.parallax.com/discussion/164592/my-robot</link> <pubDate>Mon, 27 Jun 2016 16:15:16 +0000</pubDate> <category>Robotics</category> <dc:creator>SteffeD1</dc:creator> <guid isPermaLink="false">164592@/discussions</guid> <description><![CDATA[I have a ongoing robotbuild in a real slow pace. My intention is to participate in <a href="http://robocup.dtu.dk" rel="nofollow">robocup.dtu.dk</a>. I hope i could find some more time now when I recover from a hip surgery. I'm from Sweden and have difficulties to find all Parallax products here. I apologize for my bad English.<br />My robot:<br />The shape is similar to Stingray, motors are Polulus D37xL54 1:50 200RPM #1444, Wheels are Banebots 3 7/8", and the electronics is Gadgetgangsters with octodriver.<br />I prefer to program in Spin rather than C.<br />Next step should be to modify Duane Degn Eddie firmware (or the firmware for the new DHB-10 motorcontroller) to accept Sony IR remote and serial LCD and the hardware I am using.<br />]]> </description> </item> <item> <title>Need a $13 Robot Arm?</title> <link>https://forums.parallax.com/discussion/169158/need-a-13-robot-arm</link> <pubDate>Sat, 20 Oct 2018 15:30:54 +0000</pubDate> <category>Robotics</category> <dc:creator>erco</dc:creator> <guid isPermaLink="false">169158@/discussions</guid> <description><![CDATA[Flash sale, whatever that means. Never again? EVER? <a href="https://www.gearbest.com/novelty-toys/pp_009244385861.html" rel="nofollow">https://www.gearbest.com/novelty-toys/pp_009244385861.html</a> Looks like a uArm style arm.<br /><br />Pretty sure the four 9G servos are not included, but the hardware (screws & such) is. BYO controller.<br /><br />I still like Hobby King's HXT900 servo, although metal gear servos might be best for at least the two shoulder joints (heavy loads).<br /><br />Ken, I still say Parallax ought to sell an arm kit like this. Sure would look great on top of an AB or S3!<br /><br /><a href="https://www.facebook.com/Gearbestshopping/videos/2194834950840835/" rel="nofollow">https://www.facebook.com/Gearbestshopping/videos/2194834950840835/</a>]]> </description> </item> <item> <title>Encoder signals</title> <link>https://forums.parallax.com/discussion/175603/encoder-signals</link> <pubDate>Fri, 24 Nov 2023 04:03:14 +0000</pubDate> <category>Robotics</category> <dc:creator>jdolecki</dc:creator> <guid isPermaLink="false">175603@/discussions</guid> <description><![CDATA[<p>My scorbot has encoders on each axis.</p> <p>They are described as phototransistors.<br />I have no info on them</p> <p>They are powered by 5v with a 39 ohm resistor to limit current.</p> <p>My signal is not a clean square wave as the manual says.</p> <p>What could be the issue? <br /><img src="https://forums.parallax.com/uploads/editor/lc/0hajt83yfpud.jpeg" alt="" title="" /><br /><img src="https://forums.parallax.com/uploads/editor/4a/q14pb0yv9s84.jpeg" alt="" title="" /></p>]]> </description> </item> <item> <title>P2/Brushless motor robot build</title> <link>https://forums.parallax.com/discussion/175498/p2-brushless-motor-robot-build</link> <pubDate>Sun, 03 Sep 2023 18:45:08 +0000</pubDate> <category>Robotics</category> <dc:creator>Brian_B</dc:creator> <guid isPermaLink="false">175498@/discussions</guid> <description><![CDATA[<p><img src="https://forums.parallax.com/uploads/editor/m5/axwz5vnrl6up.jpeg" alt="" title="" /></p>]]> </description> </item> <item> <title>Tank Bot attempts figure 8 (for Erco!)</title> <link>https://forums.parallax.com/discussion/175544/tank-bot-attempts-figure-8-for-erco</link> <pubDate>Sat, 30 Sep 2023 18:59:52 +0000</pubDate> <category>Robotics</category> <dc:creator>Rayman</dc:creator> <guid isPermaLink="false">175544@/discussions</guid> <description><![CDATA[<p>Doesn't @erco have a figure 8 challenge thread here somewhere? Can't find it...</p> <p>Anyway, thought good way to test out this BoeBot frame modified with the Parallax tank treads.<br />Mostly as a test for revised P2 Bot Board that happens to have correct dimensions to drop in for P1 BOE.</p> <p>Mostly a test to see if single battery pack could power P2 and servos without rebooting or other issues...<br />Seems OK. Not the best figure 8, but I'm out of time for today...</p> <p><a href="https://www.youtube.com/shorts/L3pqwiQ21bU" rel="nofollow">https://www.youtube.com/shorts/L3pqwiQ21bU</a></p> <p>P2 Spin2 source attached. Tested with Prop Tool.</p>]]> </description> </item> <item> <title>Arlo 2.0</title> <link>https://forums.parallax.com/discussion/175508/arlo-2-0</link> <pubDate>Wed, 06 Sep 2023 12:52:54 +0000</pubDate> <category>Robotics</category> <dc:creator>Brian_B</dc:creator> <guid isPermaLink="false">175508@/discussions</guid> <description><![CDATA[<p>This is my long term robotic project, an Arlo on steroids. It has 2 propellers for the drive system and is running ROS2 on a Jetson Nano to control it.</p> <p><img src="https://forums.parallax.com/uploads/editor/yr/q418r286yu6m.jpg" alt="" title="" /></p>]]> </description> </item> <item> <title>DogBot</title> <link>https://forums.parallax.com/discussion/175499/dogbot</link> <pubDate>Mon, 04 Sep 2023 18:23:02 +0000</pubDate> <category>Robotics</category> <dc:creator>Rayman</dc:creator> <guid isPermaLink="false">175499@/discussions</guid> <description><![CDATA[<p>It's walking better now.<br />Adding a bunch of caps to the P2 board lets it go a little while cord free.<br />Need to add a LiPo battery for the P2 though, so has it's own power.<br />Sharing four AA battery pack with servos isn't a good idea...</p> <p>P2 is calculating the servo angles in real time using inverse kinematics.<br />Seems OK, but maybe I'll have it populate arrays of angles and use that instead for more precision.<br />It's a little shaky and want to try and fix that...</p> <p><a href="https://www.youtube.com/shorts/x8f-yBog_5A" rel="nofollow">https://www.youtube.com/shorts/x8f-yBog_5A</a></p> <p>After that, need to see if there's a way to make it change direction on purpose.<br />Not exactly sure how to do that...</p>]]> </description> </item> <item> <title>Robot Zen Garden</title> <link>https://forums.parallax.com/discussion/175021/robot-zen-garden</link> <pubDate>Sat, 26 Nov 2022 17:44:00 +0000</pubDate> <category>Robotics</category> <dc:creator>erco</dc:creator> <guid isPermaLink="false">175021@/discussions</guid> <description><![CDATA[<p>This guy has a great Youtube channel, lots of car stuff and this! Too much time on his hands...</p> <p><span data-youtube="youtube-sTk6hyhYtYw?autoplay=1"><a rel="nofollow" href="https://www.youtube.com/watch?v=sTk6hyhYtYw"><img src="https://img.youtube.com/vi/sTk6hyhYtYw/0.jpg" width="640" height="385" border="0" alt="image" /></a></span></p>]]> </description> </item> <item> <title>Key Fob Remote (#700-10016) wire connection</title> <link>https://forums.parallax.com/discussion/175408/key-fob-remote-700-10016-wire-connection</link> <pubDate>Sun, 18 Jun 2023 14:07:39 +0000</pubDate> <category>Robotics</category> <dc:creator>LMVL</dc:creator> <guid isPermaLink="false">175408@/discussions</guid> <description><![CDATA[<p>Hi application engineers and hobbyists,</p> <p>I am going to use a Key Fob Remote (#700-10016) to control a stepper motor, two keys for forward and backward movement controls, other two keys for speed-up/down controls.</p> <p>The Key Fob receiver guide has a description, table, and drawing as shown below, I am confused with the use of VT. The description gives an option to select VT or D, however, both the table and the drawing show that VT should be used together with D. The remote has only 4 keys, D1 through D4 should work for the 4 keys, why is VT pin there connecting other D pins?</p> <p>Description<br /><img src="https://forums.parallax.com/uploads/editor/ti/z1dah66hwgpu.png" alt="" title="" /><br />Table<br /><img src="https://forums.parallax.com/uploads/editor/o0/2j6ampmx75tw.png" alt="" title="" /><br />Drawing<br /><img src="https://forums.parallax.com/uploads/editor/7y/bovcc9rcrp97.png" alt="" title="" /></p> <p>The attached file is the guide.</p> <p>I have a wire connection drawing included below for my project, I left VT unconnected. Three 9 V rechargeable batteries (8.2-8.4 V at full charge) are used to power a stepper motor that is rated for 24V use. A resistor divider is used to split the voltage to power the wireless receiver, providing 5.66-3.45 V to the receiver for the battery voltage range of 24.9 - 15 V. The motor controller has only 3 digital pins, I have to use an analog pin as a digital pin for my project.<br /><img src="https://forums.parallax.com/uploads/editor/b6/6l32tvbuy7yc.png" alt="" title="" /></p> <p>Could I trouble you to check if the wire connections are OK?</p> <p>Thanks,<br />Gu</p>]]> </description> </item> <item> <title>Scribbler 2 not working</title> <link>https://forums.parallax.com/discussion/175334/scribbler-2-not-working</link> <pubDate>Sat, 29 Apr 2023 21:07:16 +0000</pubDate> <category>Robotics</category> <dc:creator>emmie234</dc:creator> <guid isPermaLink="false">175334@/discussions</guid> <description><![CDATA[<p>Recently my Dad (who is on staff at a university) found a Scribbler 2 in the trash. The Scribbler 2 was in its original box and on the box was written "BAD ROBOT". The Scribbler does turn on, but all wants to do is flash the three red LEDs. I currently think it is a software problem and not a hardware problem because a few times when I turned it on it did move a little bit. When I get a USB-to-serial adapter I am going to try to restore the Scribbler factory program. If the restore does not fix the problem what should I try next?</p>]]> </description> </item> <item> <title>Arlo replacement parts</title> <link>https://forums.parallax.com/discussion/175337/arlo-replacement-parts</link> <pubDate>Mon, 01 May 2023 02:11:14 +0000</pubDate> <category>Robotics</category> <dc:creator>dbe11</dc:creator> <guid isPermaLink="false">175337@/discussions</guid> <description><![CDATA[<p>I'm trying to build an Arlo, but many of the parts are no longer available, for example, the power distribution board. Can I purchase or download the Gerber files to make my version?</p>]]> </description> </item> <item> <title>Balancing Car Project Attempt number 99</title> <link>https://forums.parallax.com/discussion/175221/balancing-car-project-attempt-number-99</link> <pubDate>Thu, 23 Feb 2023 23:08:08 +0000</pubDate> <category>Robotics</category> <dc:creator>iseries</dc:creator> <guid isPermaLink="false">175221@/discussions</guid> <description><![CDATA[<p>Over the number of years now I have been dabbling with make a balancing robot work with the P1. I seem to always get hung up on the timing with the Gyro Scope and the Accelerometer.</p> <p>Anyway the other day I came across this chassis that look nice and was fairly inexpensive.<br /><img src="https://forums.parallax.com/uploads/editor/4s/l2bmjmp0jenw.jpg" alt="Balance Chassis" title="" /></p> <p>Now how do I drive this thing. Parallax sells a motor driver MC33926 for $90 dollars. What that's a little steep for a motor controller. I check from the manufacturer's website and it sells for $65 there. Still a little pricey. Then I found this board:<br /><img src="https://forums.parallax.com/uploads/editor/hu/2xgoa9z1ghqd.jpg" alt="MDD3A" title="" /><br />This board is only $7. At that price I took two.<br />Now to drive this board is a snap. You only need 5 wires, Ground, M1A, M1B, M2A, M2B. That's it.<br />I went to work a coded up a driver for it in just a couple of minutes.</p> <pre spellcheck="false" tabindex="0">#include <stdio.h>#include <stdlib.h>#include "propeller.h"#include "smartpins.h"#include "mdd3a.h" int _M1A, _M1B, _M2A, _M2B; void mdd3a_Init(int m1a, int m1b, int m2a, int m2b){ int f; f = 500 | 500 << 16; _M1A = m1a; _M1B = m1b; _M2A = m2a; _M2B = m2b; _pinstart(_M1A, P_OE | P_PWM_TRIANGLE, f, 0); _pinstart(_M1B, P_OE | P_PWM_TRIANGLE, f, 0); _pinstart(_M2A, P_OE | P_PWM_TRIANGLE, f, 0); _pinstart(_M2B, P_OE | P_PWM_TRIANGLE, f, 0); } void mdd3a_SetPWM(int pwm1, int pwm2){ int set1, set2; if (pwm1 < 1000) pwm1 = 1000; if (pwm1 > 2000) pwm1 = 2000; if (pwm2 < 1000) pwm2 = 1000; if (pwm2 > 2000) pwm2 = 2000; set1 = pwm1 - 1500; set2 = pwm2 - 1500; if (abs(set1) < 5) set1 = 0; if (abs(set2) < 5) set2 = 0; if (set1 < 0) { _wypin(_M1A, 0); _wypin(_M1B, -set1); } else { _wypin(_M1B, 0); _wypin(_M1A, set1); } if (set2 < 0) { _wypin(_M2A, 0); _wypin(_M2B, -set2); } else { _wypin(_M2B, 0); _wypin(_M2A, set2); } } void mdd3a_Stop(void){ _pinf(_M1A); _pinf(_M1B); _pinf(_M2A); _pinf(_M2B);}</pre> <p>Smart pins made the job easier. The hard part was figuring out what all those codes mean to configure the smart pin and while I was at it, I made the driver compatible with an RC receiver.</p> <p>Now for the hard part. I decided to use an ICM20948 chip. This is the re-engineered MPU9250 from Invensense which is now a part of TDK. Same frustrating chip with a new twist.</p> <p>Anyway, I like a challenge and this chip aims to deliver. After working on it for about a week now I think I have the chip working enough to use in my project. The driver is massive with all the crazy stuff in the chip. It has a DMP processor on it but to use it require a lot more memory and time that I don't need to look at. The documentation is poor, and the code is only available in binary format.</p> <p>For this project I only need the Gyro scope and the Accelerometer to work.</p> <p>Here is a picture of the complete robot ready to fall over.<br /><img src="https://forums.parallax.com/uploads/editor/xv/6fv7b9yp2jvn.jpg" alt="Balance Bot" title="" /></p> <p>The most expensive piece is the P2. Now I need to build some loop code that can make this beast stand up on its own.</p> <p>Mike</p>]]> </description> </item> <item> <title>Mobile Robot in Ukraine War</title> <link>https://forums.parallax.com/discussion/175317/mobile-robot-in-ukraine-war</link> <pubDate>Thu, 20 Apr 2023 00:48:24 +0000</pubDate> <category>Robotics</category> <dc:creator>erco</dc:creator> <guid isPermaLink="false">175317@/discussions</guid> <description><![CDATA[<p>More like an R/C car, but getting there. I have wondered why no ground-based robot tech has been used.</p> <p>Battle Bots for real!</p> <p><span data-youtube="youtube-99k2uL6_HI4?autoplay=1"><a rel="nofollow" href="https://www.youtube.com/watch?v=99k2uL6_HI4"><img src="https://img.youtube.com/vi/99k2uL6_HI4/0.jpg" width="640" height="385" border="0" alt="image" /></a></span></p>]]> </description> </item> <item> <title>Scribbler S3 - Can not set port COM9's options - DTR: false</title> <link>https://forums.parallax.com/discussion/172040/scribbler-s3-can-not-set-port-com9s-options-dtr-false</link> <pubDate>Thu, 20 Aug 2020 16:25:13 +0000</pubDate> <category>Robotics</category> <dc:creator>banjo</dc:creator> <guid isPermaLink="false">172040@/discussions</guid> <description><![CDATA[As written <a href="http://forums.parallax.com/discussion/171956/how-to-get-youngsters-interested-in-stem-borrow-robots-from-local-library#latest" rel="nofollow">in another topic</a>, my school purchased a couple S3's to try out, and they arrived today after only 3 days!<br />Unfortunately I do have two issues when trying to program them through BlocklyProp (Solo). Both issues seem to have something to do with failing communication between my computers and S3's.<br /><br /><b>Issue 1: Unable to upload programs</b><br />The first time I upload a program to S3, the upload is successful and the program runs.<br />But, after that the upload fails with below messages. Reinserting the USB-cable is sometimes helping, but it's a hit or miss.<pre spellcheck="false" tabindex="0">Compile... Succeeded. Download...Failed! -------- loader messages -------- Scanning port COM9 Can not set port COM9's options - DTR: false Error: Download failed!</pre>Added screenshot from BlocklyProp Launcher with verbose output<br /><br /><br /><b>Issue 2: Terminal screen empty</b><br />When the program sometimes uploads correctly, the terminal window is empty even if my program should output a text there. The only block I have is a "Terminal send text", see attachment. The C-code produced is below. Only once I've been able to see text in the terminal window.<br />Other blocks are working though.<br /><pre spellcheck="false" tabindex="0">// ------ Libraries and Definitions ------ #include "simpletools.h" #include "s3.h" // ------ Main Program ------ int main() { s3_setup();pause(100); simpleterm_reopen(31,30,0,9600); print("Hello world, S3 calling...!"); }</pre><br />Same issues on two different computers and with both S3's, using Chrome (version 84.0.4147.135 (Official Build) (64-bit) on Win10.<br />]]> </description> </item> </channel></rss> 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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