Hi, we tried using a raspberry during the season but the performance wasn’t sufficient enough to be viable, so we are leaning towards a more powerful processor. For that reason, we would love to know if anyone has any experience using the Jetson Xavier, or if not, the Jetson Nano. We are mostly wondering about power supply and shutting down(simply disconnecting the power caused us issues).
We would appreciate your help.
What did you use it for / what will you use it for?
We used a Jetson TX2 a few years back. We had to include an auxilliary DC supply for it, because it ran on 5 volts regulated power, but pulled more current than the 5 volt supply on the voltage control module could handle.
I think we just let it die at the point the main breaker was turned off, and that didn’t cause us any problems. However, I know the student who programmed it did build in some communication so that he knew what the match was over and closed any open files, so it rarely died suddenly. My student did all the programming so I dont know what else he had to do, but he liked the frame rates he was getting. He was using it to track the vision targets
I planned on using the Jetson Nano this year, but I couldn’t find one. The global chip shortage was a real problem.
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Image processing for game piece detection.
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We used a Jetson Nano this year for game piece detection. Our team dedicated a pdh slot to our Jetson. We let the Jetson die when the breaker was turned off as well, and we did not face any issues with that throughout our season. We also soldered our power and ground cables directly to the board to get around simply having to rely on the barrel jack or the micro usb power source; if you do this, make sure to solder properly or the board may malfunction. Let me know if you have any questions concerning how to set it up!
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We’ve used a Jetson for image processing in a number of seasons since 2018. We were considering using it this year but found that we didn’t need the extra processing power for our requirements. But our programmers have a good amount of experience with it; I’m sure they’d be happy to talk to you if you have any questions.
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Did you connect it directly to the pdh or did you use a power regulator?
We used a power regulator. Not sure what it was exactly, but it was 12 volts to either a 5v 4a or a 5v 3a converter.
If you don’t use algorithms that run on the GPU, using a Jetson will not help you much. I would suggest you first make sure your code gets the expected acceleration before you start worrying about powering the Jetson on the robot.
The best solution is to mimic the image run on the rpi and have the root filesystem mounted read-only. You can add a secondary filesystem for the files that you want to modify, or if there are not any, have them on tmpfs.
Another option is to have the Jetson powered from a pass-through battery pack that is powered by the pdh. Powering down the robot will stop charging the battery pack, but the jetson will still have power.
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