Just before the regional I had finished the Power Distribution Board V3. I put it into JONA and was dismayed to see that it did not function. I put the old board back in, as I didn’t have time to debug the new board and we needed a working ROV and as much practice as possible for the upcoming competition.
Now that the regional is over (and we won!) I have time to see what was wrong with the board.
I managed to fix most of the issues with the board, but one issue remains. The fourth channels on these optoisolators do not work. The datasheet shows they’re no different than the other three, so I have no idea what the issue could be. I haven’t done too much debugging, as exploring this issue is a low-priority and high-effort endeavor.
I didn’t get a picture of the board… This is the best one I have as-of writing this
I’ve managed to reduce the amount of time that we need to wait to turn the ROV on to ten seconds by adding a 1 Ohm resistor to the space I had added in case I needed it. The ~0 Ohm connection through the MOSFET let too much current through and interfered with the startup process. The 1 Ohm resistor still interferes, but less so now.