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Originally Posted by coldabert
One recommendation I would make after seeing the schematic is to mount the LM317T (regulator) to a heat sink or piece of copper.
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Note that the tab of the LM317T is electrically hot, meaning it has output voltage (and not ground!) on it. It needs to be electrically isolated from everything else.
We built the circuit, and saw the same issues as others: The backup battery 'powering' the bot, making for some anxiety but no real issues. We used it for testing, but took it off for competition.
Anyone wants a PC Board etching pattern, PM me.
Don