We are a new team and we are concerned about being able to purchase certain COTS items this year, in particular anything to process vision, so we’ve been looking at Photonvision a little bit and it looks really good. The shape detection in the beta download worked really well on one the the Steamworks fuel balls (we only have any old game pieces to play with because AndyMark is still using them for packing materials. Thanks, AndyMark!)
We are using a Pi 3B+ with a Pi camera.
However, thinking forward, we want to test it out with the usual retroreflective material with green LEDs. It looks like the limelight 2+ has 400 lumens brightness and there is a cone structure that probably directs the light on the 8 LEDs. These LED rings are a little over 100 lumens with a 120 degree cone so we’d need 4 of those to match the output of one limelight, right?
(honestly, we’ll might just buy a limelight if they end up being available, but this is a nice preseason exercise for the programmers and electronics folks and we’d definitely use something they build themselves if it works).
Power over ethernet is also desirable, but it looks like the Raspberry Pi POE hat runs at 48V and not the 12V that is available on the robot so I’m not sure that will work (anyone use a Pi with the REV PEO injector cable?
One of the kids can CAD up a case and we can 3D print that once we figure out what we need to make a functional system. (And I’m hoping we can find a local team with some retroreflective tape that they are willing to part with so we don’t have to pay $50 for a roll - ouch).
Anyway, if anyone has thoughts on greed LED solutions and POE solutions then I’d love to hear them.