Info from today's video meeting.
======
20241212 ROS Lawn Tractor Automation meeting - Length 14:49 This video: https://youtu.be/8ePN19kc1uY
Chat/Notes: Al's Miro board: https://miro.com/app/board/uXjVM1yzdFo=/ Al's github: https://github.com/jones2126/ Al's Jupyter Notebook directory. https://github.com/jones2126/ros1_lawn_tractor_ws/tree/master/project_notes/jupyter_notebooks
Index: 00:00 Jeff: Points out links to meeting video index in description below. Comments about Slack channel backups. And the degradation of Slack usability... But we are attempting to preserve/archive Slack messages. 01:55 Al: Shows an addressable (1-wire) RGB LED. 03:05 Al: Is building a new remote control. Easy EDA layout software. 09:05 Al: Comments about his NAS drive. 09:30 Jeff: Thoughts on using the Slack archive and the HTML Lawn Tractor index and the YouTube channel index together.
==
Link to access the Slack channel: https://tractorautomation.slack.com/
Lawn Tractor Automation YouTube page: https://www.youtube.com/@lawntractorautomation2726/videos
Index for Lawn Tractor Automation Zoom meetings: http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.txt
Index for the original ROS Agriculture Zoom meetings (~250 videos): http://sampson-jeff.com/RosAgriculture/readme.txt (Use following link, or newest file in that directory) http://sampson-jeff.com/RosAgriculture/ros-agriculture-youtube20230104.txt
I was able to get the MPJA PL9823 RGB LEDs to work with the Teensy. I thought they would be drop-in equivalent, but they were not. They are 'NEO*RGB*' instead of 'NEOGRB'! Sample code attached to drive 3 LEDs at different rates. I also came across the Teensy specific time tracking function, 'elapsedMillis timeLED0;' which is new to me and elegant.
```#include
define LED_PIN 2
define NUM_LEDS 3
// Color table structure struct Color { const char** name; uint8t r; uint8t g; uint8_t b; };
// Define color table const Color COLORS[] = { {"Red", 128, 0, 0}, {"Yellow", 128, 128, 0}, {"Golden", 128, 96, 0}, {"Orange", 128, 64, 0}, {"Dark Orange", 128, 32, 0}, {"Green", 0, 128, 0}, {"Blue", 0, 0, 128}, {"White", 128, 128, 128} };
const int NUM_COLORS = sizeof(COLORS) / sizeof(Color);
// Initialize strip with RGB order AdafruitNeoPixel strip = AdafruitNeoPixel(NUMLEDS, LEDPIN, NEORGB + NEOKHZ800);
// Timing variables elapsedMillis timeLED0; elapsedMillis timeLED1; elapsedMillis timeLED2; int colorIndex0 = 0; int colorIndex1 = 0; int colorIndex2 = 0;
void updateLED0() { if (timeLED0 >= 2000) { // 2 seconds const Color& color = COLORS[colorIndex0]; strip.setPixelColor(0, color.r, color.g, color.b); Serial.print("LED 0 color: "); Serial.println(color.name);
colorIndex0 = (colorIndex0 + 1) % NUM_COLORS;
timeLED0 = 0;
strip.show();
}
}
void updateLED1() { if (timeLED1 >= 4000) { // 4 seconds const Color& color = COLORS[colorIndex1]; strip.setPixelColor(1, color.r, color.g, color.b); Serial.print("LED 1 color: "); Serial.println(color.name);
colorIndex1 = (colorIndex1 + 1) % NUM_COLORS;
timeLED1 = 0;
strip.show();
}
}
void updateLED2() { if (timeLED2 >= 6000) { // 6 seconds const Color& color = COLORS[colorIndex2]; strip.setPixelColor(2, color.r, color.g, color.b); Serial.print("LED 2 color: "); Serial.println(color.name);
colorIndex2 = (colorIndex2 + 1) % NUM_COLORS;
timeLED2 = 0;
strip.show();
}
}
void setup() { Serial.begin(9600); delay(1000); Serial.println("\nTriple LED Independent Timing Test");
// Print color table
Serial.println("\nColor Table:");
Serial.println("Name R G B");
Serial.println("------------------------");
for (int i = 0; i < NUM_COLORS; i++) {
Serial.printf("%-12s %3d %3d %3d\n",
COLORS[i].name, COLORS[i].r, COLORS[i].g, COLORS[i].b);
}
Serial.println();
strip.begin();
strip.setBrightness(128); // 50% brightness
strip.show();
// Initialize timing variables
timeLED0 = 0;
timeLED1 = 0;
timeLED2 = 0;
}
void loop() { updateLED0(); // Check and update LED0 every 2 seconds updateLED1(); // Check and update LED1 every 4 seconds updateLED2(); // Check and update LED2 every 6 seconds }```
Here is a clever idea to raise up your lawn tractor. https://www.youtube.com/watch?v=ddH7c7_o2Tc
They use a Teensy 3.2 to fire a laser at moving targets! Cool. https://www.youtube.com/watch?v=IrocytwdeEY
Getting closer to ordering a PCB for the 2nd iteration of my radio control.
@JeffS Thanks for the tip. No external resistors needed connecting the center pin to GND and the signal pins to 3 and 4. I'm not sure what my issue was earlier.
```const int leftPin = 3; // Left position of switch const int rightPin = 4; // Right position of switch
void setup() { pinMode(leftPin, INPUTPULLUP); pinMode(rightPin, INPUTPULLUP); Serial.begin(9600); }
void loop() { int leftState = digitalRead(leftPin); int rightState = digitalRead(rightPin); if (leftState == LOW) { Serial.println("Switch is in LEFT position"); } else if (rightState == LOW) { Serial.println("Switch is in RIGHT position"); } else { Serial.println("Switch is in CENTER position"); } delay(100); }```
Info from today's video meeting.
======
20241226 ROS Lawn Tractor Automation meeting - Length 30:11 This video: https://youtu.be/ritUWJ4b6kE
Chat/Notes: Al's Miro board: https://miro.com/app/board/uXjVM1yzdFo=/ Al's github: https://github.com/jones2126/ Al's Jupyter Notebook directory. https://github.com/jones2126/ros1_lawn_tractor_ws/tree/master/project_notes/jupyter_notebooks
Index: 00:00 Jeff: Points out links to meeting video index in description below. 01:10 Al: Talks about his new remote control design. Teensy 3.2, NRF24 radio, switches, pots, LEDs. 02:30 Al: Addressable RGB LEDs for status display. 03:35 Jeff: Mentions sourcing and functionality of the addressable RGB LEDs. 05:05 Al: More on implementing his LEDs. 06:00 Al: The Teensy "millis" function. More discussion of the LED implementation. 07:20 Al: More details about switches and pots and code for the remote control. 09:50 Al: Schematic of new design. Created with EasyEDA. A random tour of the project. 13:10 Jeff: Offers suggestions on wiring switches. 17:40 Back to discussion of design. 18:40 Al: Comments about pros and cons of EasyEDA. 19:10 Jeff: Suggests adding patterns for alternate parts. I.e., NRF24 radio vs. LORA radio. And adding extra pads on the unused pins. More comments about manufacturability.
==
Link to access the Slack channel: https://tractorautomation.slack.com/
Lawn Tractor Automation YouTube page: https://www.youtube.com/@lawntractorautomation2726/videos
Index for Lawn Tractor Automation Zoom meetings: http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.txt
Index for the original ROS Agriculture Zoom meetings (~250 videos): http://sampson-jeff.com/RosAgriculture/readme.txt (Use following link, or newest file in that directory) http://sampson-jeff.com/RosAgriculture/ros-agriculture-youtube20230104.txt
fun to watch...radio control flail mower https://www.youtube.com/watch?v=pKGCYjIyBqA
Finally got around to installing ROS2 jazzy on an RPi5 under Ubuntu 24.04.
I followed the instructions from Automatic Addison: https://automaticaddison.com/how-to-install-ros-2-jazzy/
btw, Ubuntu 24.10 throws errors, so I would avoid making that mistake.
*Thread Reply:* I use the desktop version because I find it easier to use LibreOffice when I need to have tools available to document stuff. btw, I use a 64GB SD card for storage and then clone the SD card to another SD card as a backup.
*Thread Reply:* 1. For desktop use I have a wall wort that has a rated output of 27 watts. I intend to use the RPi 5 on my tractor so I will have to get a buck converter with similar 12V to 5V output. I have not bought one, but this one looks interesting. https://www.pololu.com/product/4091
- This 'https://pages.github.berkeley.edu/EECS-106/sp22-site/assets/lab/2022__C106B_Lab_0.pdf' looks like ROS1 vs. ROS2. I like the idea of getting TurtleSim to work, but based on the launch command it looks like ROS1. ROS2 would be something like 'ros2 launch turtlesim turtlesimmimiclaunch.py'.
- The 'jazzy' tutorial link is definitely ROS2.
*Thread Reply:* Here is a general article on powering Raspberry Pi. I have seen other articles about powering through GPIO pins vs, the official USB connector. I will look some more. https://raspberrytips.com/how-to-power-a-raspberry-pi/
*Thread Reply:* Here is a random post. It says it is only good to 3.5A @ 5V. (Maybe that fact was from the Amazon comment) https://groups.google.com/g/hbrobotics/c/ft17P7Xz8no Be careful of the new USB-C PD interface. You could blow stuff up real quick.
Here is another random article. https://minipctech.com/power-your-raspberry-pi/
Working on my wiring for the Teensy 4.1 and my Adafruit BNO085 IMU. Using I2C seemed to work, but then I came across a warning about the RT1011 chip. Now trying to map the SPI1 since SPI0 is intended to be used by NRF24 radio. Just mentioning it here fyi. All these wires!!
*Thread Reply:* I’m thinking this adafruit usb c with 18 ga wire.https://www.adafruit.com/product/5180 . I just don’t know if I should worry about the power compliance stuff on the pi.
Info from today's video meeting.
======
20250102 ROS Lawn Tractor Automation meeting - Length 1:03:17 This video: https://youtu.be/8p7apz94TZ0
Chat/Notes: Al's Miro board: https://miro.com/app/board/uXjVM1yzdFo=/ Al's github: https://github.com/jones2126/ Al's Jupyter Notebook directory. https://github.com/jones2126/ros1_lawn_tractor_ws/tree/master/project_notes/jupyter_notebooks
https://www.flashforge.com.hk/creator-3-pro.html https://www.amazon.com/FlashForge-Creator-Independent-Extruder-Printer/dp/B09R3BPW57 https://automaticaddison.com/how-to-install-ros-2-jazzy/ https://www.pololu.com/product/4091 https://raspberrytips.com/how-to-power-a-raspberry-pi/ https://minipctech.com/power-your-raspberry-pi/ Some sketchy assumptions made in the next one (in my opinion): https://www.hackster.io/simon-vavpotic/raspberry-pi-5-how-to-use-usb-c-to-share-power-rpi-via-gpio-e07c57 USB-C References: http://ww1.microchip.com/downloads/en/appnotes/00001953a.pdf https://www.usb.org/sites/default/files/D2T2-1%20-%20USB%20Power%20Delivery.pdf
Index: 00:00 Jeff: Points out links to meeting video index in description below. 00:35 Terry: Has a 3D printer on loan. He is making an impeller blade for a snow blower. 04:05 Terry: He is using the free version of OnShape CAD software. 08:00 Terry: He has a new First Robotics team to mentor. 11:10 Some discussion about 3D printers. 14:40 Terry: Next steps in his incremental design. 16:00 Al: Has installed Ubuntu 24.04 and ROS2 Jazzy on a Raspberry Pi 5. 19:25 Al: Says he is about to order the PCB for version 2 of his remote. (See last meeting) 27:10 We talk about power for a Raspberry Pi 5. 30:45 Al: Talks about his BNO085 IMU SPI connection. 38:20 More discussion about powering Raspberry Pi. 49:50 Al: Noticed that his RPi5 will actually run Gazebo. 55:55 Jeff: Wrap up...
==
Link to access the Slack channel: https://tractorautomation.slack.com/
Lawn Tractor Automation YouTube page: https://www.youtube.com/@lawntractorautomation2726/videos
Index for Lawn Tractor Automation Zoom meetings: http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.txt
Index for the original ROS Agriculture Zoom meetings (~250 videos): http://sampson-jeff.com/RosAgriculture/readme.txt (Use following link, or newest file in that directory) http://sampson-jeff.com/RosAgriculture/ros-agriculture-youtube20230104.txt
I found a link to a page that Bob just posted: https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#schematics-and-mechanical-drawings It has partial schematics for older Pi boards, but not for Pi5.
Earlier I posted a page that has schematics. Turns out that is "THE" main documentation page for Raspberry Pi. So if you didn't know that page was there, here is a link to the entry point for that page: https://www.raspberrypi.com/documentation/computers/raspberry-pi.html
I just noticed that the USB connector that @Bob Hassett posted is a socket and not a plug. https://www.adafruit.com/product/5180 They do have a plug https://www.adafruit.com/product/5978 but read through the description to verify current, etc. And they say "Unlike USB Type C sockets, the plug side purposefully does not use both sets of D+/D-/CC pins:" So I am not sure how that applies.
PCB for radio controller arrived. Now I need to install parts to check fit and function.
*Thread Reply:* I like the PCB. I will need a new version because the solder pads for the LEDs and capacitors are too small for my hand soldering skills.
*Thread Reply:* Started on version 2 with wider pads to make soldering easier for me.
I am able to program my Teensy 4.1 which is connected to my RPi 5 using the Arduino IDE. Since the IDE is version 1.8.19 there are a few steps. For example:
- Install Arduino manually - do not use 'App Center'
- Download a copy of UDEV rules at: https://www.pjrc.com/teensy/00-teensy.rules
- cd ~/Downloads
- $ sudo cp 00-teensy.rules /etc/udev/rules.d/
- Get TeensyduinoInstall at: https://www.pjrc.com/teensy/td_download.html
- Download 'AARCH64' version for RPi5
- $ cd Downloads
- $ chmod +x TeensyduinoInstall.linuxaarch64
- $ ./TeensyduinoInstall.linuxaarch64 --dir=/home/al/arduino-1.8.19 ** adjust to your install for the home directory
- Open Arduino; set port and board. Teensy boards should be available
- Load and upload blink programs Now to try and get it to work with VSCode and PlatformIO 🤔
Info from today's video meeting.
====== 20250109 ROS Lawn Tractor Automation meeting - Length 1:02:07 This video: https://youtu.be/2w602Gyawo0
Chat/Notes: Al's Miro board: https://miro.com/app/board/uXjVM1yzdFo=/ Al's github: https://github.com/jones2126/ Al's Jupyter Notebook directory. https://github.com/jones2126/ros1_lawn_tractor_ws/tree/master/project_notes/jupyter_notebooks
A 5 amp USB-C cable from Amazon. https://www.amazon.com/gp/product/B0C1YXM9PF?ref=ppx_pt2_dt_b_prod_image A 5V/5A power convertor from Amazon. https://www.amazon.com/gp/product/B01NALDSJ0?ref=ppx_pt2_dt_b_prod_image&th=1 The voltage/current monitor command. https://forums.raspberrypi.com/viewtopic.php?t=367244 pi 4b won't boot and green led keep blinking fast https://forums.raspberrypi.com/viewtopic.php?t=324271 https://forums.raspberrypi.com/viewtopic.php?f=28&t=58151 This page has a chart that says Ubuntu 24.04 will run on either RPi4 or RPi5. https://ubuntu.com/download/raspberry-pi 32GB cards will not work. https://askubuntu.com/questions/1134859/sd-card-not-mounting-with-mmc0-error-110-whilst-initialising-sd-card https://patchwork.kernel.org/patch/11088719/ Collection of RPi "partial" schematics. (But not RPi5) https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#schematics-and-mechanical-drawings RPi4 board revision. https://www.cytron.io/tutorial/how-to-check-if-your-raspberry-pi-4-model-b-is-rev1-2 Crimp on ferrules. (From our HTML meeting index) http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm#20230112 @10:35
Index: 00:00 Jeff: Points out links to meeting video index in description below. 00:20 Jeff: Powering RPi5 with batteries. 06:45 Jeff: The extra requirements for power supply "negotiation". 19:05 Jeff: Stories about getting the RPi4 to run again. 21:00 Jeff: Trying to read existing Micro SDFlash card on Ubuntu laptop. And reloading the card with Ubuntu 24.04. 24:10 Jeff: Found that 32GB Micro SDFlash cards will not work on Ubuntu laptop. 28:45 Al: Advice on booting. Initially, boot from from SDFlash and not USB devices. 29:20 Jeff: Also suggests starting with an official RPi power supply instead of battery power. 30:15 Al: Shows more about his new radio control PCB. 46:20 Al: Wants to reprogram his Teensy 4.1 without removing it from the board. 51:10 Jeff: Suggests running an RPi5 from an RPi4 power supply. Which would simulate not having PD negotiation. 52:30 Jeff: Mentions that some of the RPi boards have "partial" schematics posted. 53:10 Jeff: More than one revision of RPi4 board. 54:00 Jeff: Some more comments on the new USB power supply. 56:55 Al: Asks about wires in screw terminals. (crimp on ferrules) 59:30 Al: Anecdotes about soldering.
==
Link to access the Slack channel: https://tractorautomation.slack.com/
Lawn Tractor Automation YouTube page: https://www.youtube.com/@lawntractorautomation2726/videos
Index for Lawn Tractor Automation Zoom meetings: http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.txt
Index for the original ROS Agriculture Zoom meetings (~250 videos): http://sampson-jeff.com/RosAgriculture/readme.txt (Use following link, or newest file in that directory) http://sampson-jeff.com/RosAgriculture/ros-agriculture-youtube20230104.txt
Found an interesting use of IBT-2 motor controllers https://www.xsimulator.net/community/threads/full-frame-2-dof-traction-loss-new-build.14740/ and an interesting motor https://www.ebay.com/itm/324674657479?skw=Crab+pot+motors&itmmeta=01JH70BBGPRQ743BQVZST5NC4A&hash=item4b981e1cc7:g:LWoAAOSwZfBgxWcC&itmprp=enc%3AAQAJAAAA8HoV3kP08IDx%2BKZ9MfhVJKnhK%2FzQp60yW5jYSucyCilU4sCOJO1i5emQtPhZLRHOsvvIJFOgNnV7bR6IFOH3VqOIS5eGhrLpVZRNuAWkE9rO44f5tt%2FfEkmLhzCB9DFJeAb%2BkQNUzNM9fPlEkyIaUhKwQ2GNb3xM5a9yXXElo5Pb7ZSaaQ%2BJ%2FJO6ImA%2Bs80dWfJXvImSx45A07J37gvATkK8uUHc5WGTewx92SmB70nAQ9k4iBstkzrvdWpBeVydSHs1PZ8HYcBGbU1GvYnmlhx4nkjM5SJ0QHJFOSJlUHmKQHmTs1OqQyfEPsbbHgZEtw%3D%3D%7Ctkp%3ABFBMvLit4Ill|https://www.ebay.com/itm/324674657479?skw=Crab+pot+motors&itmmeta=01JH70BBGPRQ743B[…]0QHJFOSJlUHmKQHmTs1OqQyfEPsbbHgZEtw%3D%3D%7Ctkp%3ABFBMvLit4Ill
While I’m waiting for parts (wall wort and etc.) to arrive thought I’d put my battery together. Right hand switch will go to a step down and then on to the Rpi-5 circuit. The left hand switch will go to a vex controller and RC transmitter. Eventually I’ll replace the power hungry lights with led status lights. Right now I just want to get something up and working.
I got my Amazon order today. I decided to go with this one for a number of reasons. This way I can see how much current additional peripherals will take individually. Then plan accordingly. Eventually I may go with what Jeff and Al are using after I gain some experience.
Did a preliminary test. With no micro card in the Rpi5 and using the official ww, The green light came on as well as the fan. Next test was battery power. Same results, green light and fan working. Looking like it draws only 0.75 amp.
Next is to setup micro card with 24.04.
PS: I have an external 250GB SSD plugged into my computer. That is the extra drive that shows up.
This looks like a fairly complete video for using rpi-imager. https://www.youtube.com/watch?v=YmmThbZmNIw
Well this was a pain, but I have it working. I have my RPi 5 booting from a 500GB USB drive with Ubuntu 24.10. I then loaded Docker on it. I then installed an Ubuntu 24.04 inside Docker. I then followed slightly edited Automatic Addison commands to get Jazzy installed and ran the demo programs. Not a simple process.
Now I want to try and get the Teensy example running, but it uses a different Ubuntu and a different ROS2 version, hence the reason to figuring out Docker (at least nominally).
*Thread Reply:* Making some progress getting my Teensy to talk to ROS. Current status is I worked through the example here. Unfortunately near the end when compiling the Teensy Example I hit a compiler error that looks like it can't find the correct compiler. Will try and find a fix today.
*Thread Reply:* I decided to try and compile a micro-ROS program on my W10 machines with Arduino 2.3.4. After multiple tweaks I could not get that to work. Then I tried a plain PlatformIO install and after a tedious process to figure out the libraries and the platform.ini file I was able to get a clean compile using a Humble version of micro-ROS. Now to actually test it on my RPi, because at this point all I have is a clean compile on my Teensy using the micro-ROS library.
mkdir micro_ros_teensy
cd micro_ros_teensy
git clone -b humble <https://github.com/micro-ROS/micro_ros_arduino.git> lib/micro_ros_arduino
*Thread Reply:* After another day of fighting/playing with SDFlash cards I was able to run from a backup copy. My biggest problem was that all SDFlash cards seem (may) be different actual sizes. So I had created my backup image that is bigger than the cards I am trying to copy to. (15.9GB vs, 15.5GB) One way is to copy the 16GB image to a 32GB card, which is what finally worked.
From an old video (6 years ago) it looks like the Windows version nay have a check box to solve this problem.
From the ROS Agriculture index: http://sampson-jeff.com/RosAgriculture/ros-agriculture-youtube20230104.txt I found a previous discussion on this. 12202019 Lawn Tractor Meeting - @13:40_20:00 https://www.youtube.com/watch?v=dWHoIJrZajg
Another approach may be to trim down your Linux partition before doing the backup. I haven't tried that yet. But The Windows utility is probably the way to go.
Info from today's video meeting.
====== 20250117 ROS Lawn Tractor Automation meeting - Length 1:00:42 This video: https://youtu.be/WiBqk2mw-Nc
Chat/Notes: Al's Miro board: https://miro.com/app/board/uXjVM1yzdFo=/ Al's github: https://github.com/jones2126/ Al's Jupyter Notebook directory. https://github.com/jones2126/ros1_lawn_tractor_ws/tree/master/project_notes/jupyter_notebooks
First Robotics: A Youtube of the Sunday First Robotics tournament. https://www.youtube.com/watch?v=tFSW9bpwrdA&t=1403s
We are team 26205. We are featured at times: #6: 49:00 #10: 2:10:00 #14: 2:33:30 #23: 3:22:08 #31: 4:04:15 #37: 4:36:00 We Ranked 5th out of 26 teams. State Tournament Qualification Announcement: 6:53:30
Yarbo: The Yarbo youtube group - The autonomous snowblower https://www.youtube.com/@yarboglobal
Spyker: Spyker Workshop - the RC Snowblower https://www.youtube.com/@thegreatestmoo
Ferrule videos: http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm@20250109 @56:55 http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm#20230112 @10:35
Copy flash cards (from ROS Agriculture): https://www.youtube.com/watch?v=dWHoIJrZajg @13:40_20:00
Index: 00:00 Jeff: Points out links to meeting video index in description below. 00:30 Terry: Mentions his First Robotics team. 01:15 Terry: Talks about his autonomous snow blower/thrower. For previous discussion see http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm#20250102 Mentions other web sites for reference. 04:45 Terry: Shows more of his 3D CAD for his snow blower parts. Discussion about how it works. 11:00 Al: Asks about the First Robotics objective. Some discussion. Reference to video of the tournament. 13:10 Al: Mentions using Miro Board for documentation. 14:50 Jeff: Shows the USB-C cable and Drok power supply from Amazon to power RPi. This was mentioned last week. http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm#20250109 17:10 Jeff: Goes off on a tangent about screw terminals. 21:55 Jeff: "Yes, this will power an RPi4. But an RPi5 requires extra configuration..." 23:40 Jeff: Bob's RPi5/Drok setup to power RPi5. 29:00 Jeff: Mention of crimp on ferrules. 31:35 Jeff: Talks about SDFlasn cards. Various stories. 40:00 Jeff: Complains about the official Raspberry Pi OS. Specifically worthless browsers. 42:10 Jeff: Moves on to loading micro-ros onto ROS2 Jazzy. 44:55 Al: Talks about both ends of mirco-ros. The Teensy end seems to be the problem. 49:10 Al: Comments about SDFlash cards. Jeff talks about unmounting cards. 50:15 Jeff: Was confused about what Al's problem was. 55:15 Terry: Asks differences between micro-ros, ros_serial or just plain serial.
==
Link to access the Slack channel: https://tractorautomation.slack.com/
Lawn Tractor Automation YouTube page: https://www.youtube.com/@lawntractorautomation2726/videos
Index for Lawn Tractor Automation Zoom meetings: http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.txt
Index for the original ROS Agriculture Zoom meetings (~250 videos): http://sampson-jeff.com/RosAgriculture/readme.txt (Use following link, or newest file in that directory) http://sampson-jeff.com/RosAgriculture/ros-agriculture-youtube20230104.txt
Trying to run the micro ROS tutorial here https://micro.ros.org/docs/tutorials/core/teensy_with_arduino/ I'm getting an unexpected error when running the command
ros2 run micro_ros_setup build_agent.sh
The cause might be the slow internet I'm on :(
*Thread Reply:* root@tractor:/# ros2 topic list shows '/teensy_publisher' which I'm interpreting as positive. I'm using Docker and ROS Foxy instead of Jazzy, but at least I've gotten this far. I will be interested to see how @JeffS is going with Jazzy.
*Thread Reply:* I successfully loaded everything on laptop, 24.04, Jazzy, Arduino 2.3.4 and the other tid-bits. I loaded the Teensy 3.2 example and it won't compile on Arduino. I found the answer here: https://github.com/micro-ROS/micro_ros_arduino/issues/1491 It's not what I wanted to hear. But it was 5AM and I decided to worry about it today.
I'll post a few more comments/impressions after I go look at what Bob is posting about.
<a
href="https://github.com/micro-ROS/micro_ros_arduino">micro-ROS/
micro_ros_arduino</a>
Info from today's video meeting.
====== 20250123 ROS Lawn Tractor Automation meeting - Length 52:37 This video: https://youtu.be/zDjccCLL370
Chat/Notes: Al's Miro board: https://miro.com/app/board/uXjVM1yzdFo=/ Al's github: https://github.com/jones2126/ Al's Jupyter Notebook directory. https://github.com/jones2126/ros1_lawn_tractor_ws/tree/master/project_notes/jupyter_notebooks
Running Micro-ROS on a Teensy using Arduino IDE. https://micro.ros.org/docs/tutorials/core/teensy_with_arduino/ Bug report about _localectype_ptr issue. https://github.com/micro-ROS/micro_ros_arduino/issues/1491 Various links from the Home Brew Robotics meeting. Responses after meeting: https://groups.google.com/g/hbrobotics/c/Q9GfWUAG8x8 Camp: https://github.com/linorobot/linorobot2?tab=readme-ov-file Michael: Here’s how I create a custom MicroRos with enhanced resources: https://docs.google.com/document/d/1zK3SwKIC5RR9f-bLyeXuWuK3pyJO_6_w5IBDYwLBftQ/edit?usp=sharing And this: https://docs.google.com/document/d/1YstDMvXV-CNdXFkPmAu3edRpzCSSLczm2AMOBwKAb90/edit?usp=sharing github: https://github.com/wimblerobotics/Sigyn/tree/main Sergei: https://photos.app.goo.gl/jwYZRtTi1LVshQoW8 https://github.com/slgrobotics/robots_bringup/tree/main Marco: https://www.youtube.com/watch?v=Duys_q16pEA
Index: 00:00 Jeff: Points out links to meeting video index in description below. 00:35 Terry: Talks about his autonomous snow thrower. OnShape, CAD model animation. 02:50 Al: Switching from ROS1 to ROS2. RPi5, Teensy 3.1, Micro-ROS. PlatformIO, Micro-ROS with Docker. 08:00 Al: Shows tutorial results of Foxy under Docker. Says Micro-ROS seems "heavy". Maybe just use simple serial messages instead. 09:00 Al: Comments about powering his RPi5. Differences of versions in Micro-ROS experiments. 10:00 Jeff: Will Micro-ROS talk across different ROS versions? 11:00 Jeff: Talks about what worked and what didn't. Micro-Ros on 24.04 and jazzy works on ROS without Docker. Can't do any Arduino compile work without Docker. 12:00 Jeff: Arduino can't find compiler or has undefined references. Problem appears to be that the precompiled library they supply has to use the same compiler we are currently trying to use. 19:00 Al: Shows how he used PlatformIO to compile the Teensy code. The message he is referring to is https://tractorautomation.slack.com/archives/C8X6X6H7D/p1737071653511209?thread_ts=1736798698.213119 if you are on our Slack. 22:50 Jeff: Speculates on not using either Arduino or PlatformIO to compile. 25:40 Al: Again says he may just go with custom serial messages. 25:45 Jeff: Random discussion from the Home Brew Robots meeting. Who is using what... 29:05 Jeff: Posts a lot of links to be put in the description. (See chat section above) 41:35 Jeff: Sums up his progress on Micro-ROS. 42:10 Jeff: Again mentions/speculates compiling without Arduino or PlatformIO. 43:30 Jeff: Complains about the way tutorials are written. (Not that he could do any better...) Points out he loaded a mismatch of versions since the tutorial was out of date. 45:40 Jeff: Moved on to the Arduino 2.3.4 install and used careful guessing to make it work. Which ended in the undefined reference. You should re-compile the pre-compiled part. 46:30 Jeff: Talks about ethernet on the Teensy 4.1. 48:20 Jeff: Mentions multiple copies of Micro-ROS running. 49:50 Jeff: Goes on a rant about YouTube uploads to finish off. (Will I get banned from YouTube if I say YouTube in the description?)
==
Link to access the Slack channel: https://tractorautomation.slack.com/
Lawn Tractor Automation YouTube page: https://www.youtube.com/@lawntractorautomation2726/videos
Index for Lawn Tractor Automation Zoom meetings: http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.txt
Index for the original ROS Agriculture Zoom meetings (~250 videos): http://sampson-jeff.com/RosAgriculture/readme.txt (Use following link, or newest file in that directory) http://sampson-jeff.com/RosAgriculture/ros-agriculture-youtube20230104.txt
I think I fixed line 122. Reset profile and bashrc
Now to start over with ROS 2 and see if it is fixed?
This GNSS GPS https://navspark.mybigcommerce.com/px1172rd-evb-px1172rd-l1-l2-rtk-dr-evaluation-board/ markets having dead reckoning in GPS starved environments.
"The sensor-fusion algorithm combines 3-axis accelerometer, 3-axis gyroscope, GNSS measurement, wheel tick, RTK base correction, and vehicle dynamics model to provide best-in-class position accuracy when GNSS alone fails."
My faith is diminishing based on no YouTube hits, no GitHub hits, and the attached email exchange with their support. Sad 😞 Maybe just feed it data from one wheel? That would seem pretty odd.
*Thread Reply:* Additional reference links for uBlox EVK-M9DR-0:
Above video YouTube link; Datasheet at Mouser link; Product page at Mouser https://www.mouser.com/ProductDetail/u-blox/EVK-M9DR-0?qs=rQFj71Wb1eVqrKznG%252B8szA%3D%3D|link
Just an intro video, but it will be interesting to watch to see when/if they get into the micro-ROS discussion.... https://www.youtube.com/watch?v=uJuC1zkUsZ8
It occurred to me that I could try to compile for a Teensy 4.1 (even though I don't have one). So I switched the board from 3.2 to 4.1 and it compiled.
I was thinking I could track down some videos on Micro-ROS. But maybe I should just go to bed...
How about this one for micro ROS
https://youtube.com/watch?v=SV7DeB7kDZs&si=T99JjdD3Iag_Govc
Info from today's video meeting.
====== 20250130 ROS Lawn Tractor Automation meeting - Length 44:11 This video: https://youtu.be/_rR1XtKgd8E
Chat/Notes: Al's Miro board: https://miro.com/app/board/uXjVM1yzdFo=/ Al's github: https://github.com/jones2126/ Al's Jupyter Notebook directory. https://github.com/jones2126/ros1_lawn_tractor_ws/tree/master/project_notes/jupyter_notebooks
"Official" Micro-ROS Teensy Arduino tutorial. https://micro.ros.org/docs/tutorials/core/teensy_with_arduino/
Aleksander Haber - Install Micro-ROS for Teensy. https://www.youtube.com/watch?v=SV7DeB7kDZs
Video on u-blox dead reckoning. https://www.youtube.com/watch?v=gkCmXT_K4nI
Index: 00:00 Jeff: Points out links to meeting video index in description below. 00:30 Jeff: Talks about Micro-ROS experiences. 00:45 Jeff: Original Arduino 1.8.19 on laptop. Failure. 01:20 Jeff: Arduino 2.3.4 on laptop. Failure/success. 03:35 Jeff: Install Arduino 2.3.4 on RPi4. Failed since Arduino doesn't support ARM for 2.x 04:45 Jeff: It was suggested to load Arduino 1.x on RPi. That loaded and ran. But I decided I may have the same AMD64/ARM64 problem with the Teensy installers. So I didn't have the patience to find out. So I moved on. 05:25 Jeff: Mentions the Micro-ROS discussion at HBRC meeting. Although I think it was the week before that had the long discussion. Recap/links here: http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm#20250123 05:45 Jeff: Again tried to load Arduino 1.8.19 on laptop. Failure again. 06:25 Jeff: Attempted to follow video tutorial from Aleksander Haber video. (That Bob had posted to Slack.) Failure/success. 10:15 Al: Asks about compiler versions. (while we are waiting to Arduino to load) 12:30 Arduino has loaded... Downgrading and patching. 14:45 Jeff: Be careful, because it offers to "help you" with new "updates". 16:45 Jeff: It works. And a recap of what worked. 18:25 Jeff: A few more obscure comments on installing. 21:50 Jeff: Again asks what is Micro-ROS and how would you use it. 22:45 Al: Mentions compiling Micro-ROS with Docker and made it work. Shows some details on compiling Micro-ROS with PlatformIO. 28:10 Al: Talks about NavSpark GNSS boards. Also talks about dead reckoning. Al shows the video. 39:30 Jeff: Mentions that the robot_localization nodes may give similar results.
==
Link to access the Slack channel: https://tractorautomation.slack.com/
Lawn Tractor Automation YouTube page: https://www.youtube.com/@lawntractorautomation2726/videos
Index for Lawn Tractor Automation Zoom meetings: http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.txt
Index for the original ROS Agriculture Zoom meetings (~250 videos): http://sampson-jeff.com/RosAgriculture/readme.txt (Use following link, or newest file in that directory) http://sampson-jeff.com/RosAgriculture/ros-agriculture-youtube20230104.txt
Home Brew Robotics January monthly meeting has been posted: https://www.youtube.com/watch?v=erO2XZe8TY0
I found all 3 presentations interesting. I scanned through to get the starting times. The beginning of the video has a business meeting and show-and-tell.
@34:00 (15 minutes) Abstract: LiDAR Sensor Aided Navigation Smart white cane light, our sensors, and navigation for the blind on a two-wheel scooter
@50:00 (15 minutes) Abstract: Robot navigation via sending photos to a large language model AI.
@1:08:20 (30 minutes) Abstract: I plan to advocate ROS2 as the "easiest way to program robots" and offer a template for the least painful way to start learning ROS2.
https://en.wikipedia.org/wiki/ChatGPT I’m wondering how ChatGPT INTERFACES to Arduino or a Rpi? Another question is how to make it autonomous for a lawn mower? There was a security breach at one point. Sooo …. how secure will it be?
Info from today's video meeting.
====== 20250206 ROS Lawn Tractor Automation meeting - Length 37:41 This video: https://youtu.be/8WylR5YuZ6o
Chat/Notes: Al's Miro board: https://miro.com/app/board/uXjVM1yzdFo=/ Al's github: https://github.com/jones2126/ Al's Jupyter Notebook directory. https://github.com/jones2126/ros1_lawn_tractor_ws/tree/master/project_notes/jupyter_notebooks
Index: 00:00 Jeff: Points out links to meeting video index in description below. 01:25 Jeff: Talks about people switching to ROS2 on Raspberry Pi. 01:55 Jeff: The problem of which board, which OS version, which ROS version. They all have to match. 04:15 Jeff: The Docker container path. 05:30 Jeff: Docker vs. virtual machine. 06:00 Jeff: A laptop with Ubuntu 20.04, ROS1 Noetic, ROS2 Foxy. 06:45 Jeff: Run ROS1, or run ROS2, or run them both at the same time. (ros1_bridge) 08:25 Jeff: Or connect two computers together. 09:45 Jeff: OS support always "catching up" with next version of Raspberry Pi. 16:30 Jeff: Summarizes "Version Hell". 17:40 Al: Comments on "Version Hell". 18:20 Al: Talks about his Raspberry PI 5. 18:40 Jeff: Asks if Al has tried his external battery to power his RPi5. 21:10 Comments about attending/missing the HBRC meetings. 23:50 Jeff: Asks about availability of drivers for ROS2. 28:30 Al: Shows a "dead reckoning" GPS receiver he ordered. (uBlox EVK-M9DR) Also see last week's meeting. 31:45 Al: Talks about a computer vision experiment to monitor farm status. 36:10 Al: Mentions his linear actuator to control his hydrostatic transmission.
==
Link to access the Slack channel: https://tractorautomation.slack.com/
Lawn Tractor Automation YouTube page: https://www.youtube.com/@lawntractorautomation2726/videos
Index for Lawn Tractor Automation Zoom meetings: http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.txt
Index for the original ROS Agriculture Zoom meetings (~250 videos): http://sampson-jeff.com/RosAgriculture/readme.txt (Use following link, or newest file in that directory) http://sampson-jeff.com/RosAgriculture/ros-agriculture-youtube20230104.txt
This is just crazy! It takes me months to make anything. Because I have to agonize over every little detail. https://www.youtube.com/watch?v=s2LUfYi-JC0
@Al Jones I found a video for a cheap foam core airplane. He then pointed to a video to make the cheap remote control. https://www.youtube.com/watch?v=BKnxkAgBggM https://www.youtube.com/watch?v=3PUtnGxgTwI That turns up lots of variations of the same type of thing, https://www.youtube.com/watch?v=47eBRwFQp-g https://www.youtube.com/watch?v=LRP62cfE2wo https://www.youtube.com/watch?v=eadkW_cUP_I https://www.youtube.com/watch?v=5BfRg9CUMYI
Looking at the U-Blox 'dead reckoning' GPS unit I realized it is not an RTK unit, that is, it does not have the ability to ingest RTCM correction data, so I'm back looking at my SkyTraQ (Navspark) units. I have the PX1125R as a base and PX1172RDP as the rover. The PX1172RDP both accepts RTCM correction data and also wheel tick data for dead reckoning, My 3DR radios did not work immediately so I double checked the correction data was passing OK and the rover was achieving RTK Fixed. The test script is here.
*Thread Reply:* Just posting here so I hopefully remember to cover it at the weekly meeting. My 3DR radio's were not connecting with each other until I put my laptop in airplane mode. Too much interference is my guess. I still need to test with the gnss units, but this will be my configuration for testing.
*Thread Reply:* It's been a while, but I'm pretty sure I did test that successfully since I have a hookup diagram in my notes.
This might be interesting. I’d like to see the math be hind this. Do they use different channels, frequencies? How about same frequency but different beacon call signs/IDs?
https://apple.news/Aiogf1epWQgaJqoUKUWIRZg
@Bob Hassett Here is another GPS alternative. "The end of GPS (Part 1) - Quantum Navigation" https://www.youtube.com/watch?v=oSiLRadzYhE
Info from today's video meeting.
====== 20250214 ROS Lawn Tractor Automation meeting - Length 29:55 This video: https://youtu.be/4m6owe4QKxg
Chat/Notes: Al's Miro board: https://miro.com/app/board/uXjVM1yzdFo=/ Al's github: https://github.com/jones2126/ Al's Jupyter Notebook directory. https://github.com/jones2126/ros1_lawn_tractor_ws/tree/master/project_notes/jupyter_notebooks Al's gist channel: https://gist.github.com/jones2126
Short cut keys. Mozilla/Firefox https://support.mozilla.org/en-US/kb/keyboard-shortcuts-perform-firefox-tasks-quickly Linux terminal/bash https://linuxsimply.com/linux-bash-terminal-keyboard-shortcuts/ gedit/gnome https://help.gnome.org/users/gedit/stable/gedit-shortcut-keys.html.en Home Brew Robotics Club mailing list. https://groups.google.com/g/hbrobotics You can subscribe to that and select digest mode. Thomas Messerschmidt FemBots https://www.youtube.com/@Robots-and-androids
Index: 00:00 Jeff: Points out links to meeting video index in description below. 01:30 Al: Talks about "Dead Reckoning" GPS receivers. uBlox EVK-M9DR and SkyTraQ (Navspark) PX1172RDP 03:15 Al: Back to using SkyTraQ. And test method. https://gist.github.com/jones2126/com6tocom10.py 04:10 Al: Using 3DR radios for correction data. Notes on baud rates. 08:35 Discussion of "Air Plane Mode" vs. WiFi and Bluetooth on Ubuntu Linux. 10:20 We discuss the copy/paste issues In Ubuntu that Bob was posting about. 26:30 Al: Asks about Home Brew Robotics Club ROS meeting schedules. 27:50 Mention of the HBRC AI group. (maybe Thursday nights?) Thomas Messerschmidt
==
Link to access the Slack channel: https://tractorautomation.slack.com/
Lawn Tractor Automation YouTube page: https://www.youtube.com/@lawntractorautomation2726/videos
Index for Lawn Tractor Automation Zoom meetings: http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.txt
Index for the original ROS Agriculture Zoom meetings (~250 videos): http://sampson-jeff.com/RosAgriculture/readme.txt (Use following link, or newest file in that directory) http://sampson-jeff.com/RosAgriculture/ros-agriculture-youtube20230104.txt
*Thread Reply:* Well if your mouse buttons don't work on your touch pad then you have something to track down. I looked under Settings|Mouse&Touchpad. It doesn't have any settings for turning the buttons on or off. But this search may give a clue to fix the buttons:
<https://duckduckgo.com/?t=ffab&q=lenovo+touchpad+buttons+enable&ia=web>
*Thread Reply:* I guess one has to decide https://www.geeksforgeeks.org/kde-vs-gnome/
Info from today's video meeting.
====== 20250220 ROS Lawn Tractor Automation meeting - Length 12:36 This video: https://youtu.be/_ba9NMdJRak
Chat/Notes: Al's Miro board: https://miro.com/app/board/uXjVM1yzdFo=/ Al's github: https://github.com/jones2126/ Al's Jupyter Notebook directory. https://github.com/jones2126/ros1_lawn_tractor_ws/tree/master/project_notes/jupyter_notebooks Al's gist channel: https://gist.github.com/jones2126
Index: 00:00 Jeff: Points out links to meeting video index in description below. 00:30 Al: Quick update on his SkytraQ (Navspark) PX1172RDP "Dead Reckoning" GPS receiver. 25 Hz update rate. Works better with L1/L2 corrections as opposed to L1/L5. 03:00 Al: Video about frame modifications. https://tractorautomation.slack.com/archives/C8X6X6H7D/p1740066091248449 Linear actuator for hydrostatic transmission control. More random discussion about mounting things. 10:40 Al: Revisiting a kill switch for the engine.
==
Link to access the Slack channel: https://tractorautomation.slack.com/
Lawn Tractor Automation YouTube page: https://www.youtube.com/@lawntractorautomation2726/videos
Index for Lawn Tractor Automation Zoom meetings: http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.txt
Index for the original ROS Agriculture Zoom meetings (~250 videos): http://sampson-jeff.com/RosAgriculture/readme.txt (Use following link, or newest file in that directory) http://sampson-jeff.com/RosAgriculture/ros-agriculture-youtube20230104.txt
First attempt at using OnShape for designing and laying out my flat bar pieces to hold various electronic components and I have measurements to give my metal fabricator. View Only Link: https://cad.onshape.com/documents/950c6a38b11772edc3c3e657/w/da7af5b45a56c817cf16e3b0/e/defcfd75713c7acac20db1fd?renderMode=0&uiState=67bf572bdc26402a1721a736|https://cad.onshape.com/documents/950c6a38b11772edc3c3e657/w/da7af5b45a56c817cf16e3b[…]13c7acac20db1fd?renderMode=0&uiState=67bf572bdc26402a1721a736
Info from today's video meeting.
====== 20250227 ROS Lawn Tractor Automation meeting - Length 25:15 This video: https://youtu.be/T6RBbiGSrCs
Chat/Notes: Al's Miro board: https://miro.com/app/board/uXjVM1yzdFo=/ Al's github: https://github.com/jones2126/ Al's Jupyter Notebook directory. https://github.com/jones2126/ros1_lawn_tractor_ws/tree/master/project_notes/jupyter_notebooks Al's gist channel: https://gist.github.com/jones2126
Al: PCB Cad system. https://easyeda.com/ AL: Al's CAD project. https://cad.onshape.com/documents/950c6a38b11772edc3c3e657/w/da7af5b45a56c817cf16e3b[…]13c7acac20db1fd?renderMode=0&uiState=67bf572bdc26402a1721a736
Index: 00:00 Jeff: Points out links to meeting video index in description below. 00:50 Terry: Talks about OnShape 3D CAD for his "snow thrower" he is designing. 02:50 Terry: Custom designed encoder wheel/sensor to detect impeller rotation. 03:20 Al: Asks about "tabs". Discussion of tabs and subfolders in OnShape. 04:05 More discussion of OnShape terms, definitions, and concepts. 08:10 Jeff: Mentions I/R transparent plastic. 10:30 Designing PC boards with OnShape? 14:25 Terry: Talks about problems with high humidity 3D filament. Stringing vs. flaking. 17:45 Al: Asks if OnShape will create an STL file. 19:15 Al: Talks about his mounting brackets for version 3 lawn tractor. 20:25 Al: Is learning OnShape to do his modeling.
==
Link to access the Slack channel: https://tractorautomation.slack.com/
Lawn Tractor Automation YouTube page: https://www.youtube.com/@lawntractorautomation2726/videos
Index for Lawn Tractor Automation Zoom meetings: http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.txt
Index for the original ROS Agriculture Zoom meetings (~250 videos): http://sampson-jeff.com/RosAgriculture/readme.txt (Use following link, or newest file in that directory) http://sampson-jeff.com/RosAgriculture/ros-agriculture-youtube20230104.txt
This month's HBRC meeting has been posted. https://www.youtube.com/watch?v=nB2lr-J9ewU ```Last night was quite a meeting featuring Mike Overstreet... humanoid expert. The video is up and the Chat is in the comments. Thanks to those who participated and especially those who help setup at Maker Nexus. Mike's presentation starts at 28 minutes in.
HomeBrew Robotics Club Meeting - February 26: Humanoid Robots by Michael Overstreet https://youtu.be/nB2lr-J9ewU?si=KS-gRMR-0FYPGABu
Enjoy, Camp```
Back to using Fusion 360 for design work. Seems the free version of OnShape has some sheet metal features, but the free version does not allow for creating a flat sheet DXF file which is what I want to send to my guy with a plasma cutter and metal bender.
Getting closer to plasma cutting the parts. After a little back and forth with the fabricator on millimeter vs. inch unit of measure and how the bend lines would be represented, the parts are now laid out in the plasma cutter software.
