with board support and functionality all tested, its time to neaten up the board and get ready for pcb ordering. top silk is done here, bottom silk still needs some work. we’ve got the pretty-pins diagram made to verify pin functionality. in order to get the high speed spi port exposed, we dropped the adc’s on those pins – you still get adc on all the other breakout pads. schematic is minimal but, hey, it seems to work! since this qt py would be most benefited by a battery input, we popped another schottky on the bottom and a vbat pad. this is also our first 4 layer board. we could probably design it without inner ground/3.3V but given we aren’t using a module, and there’s an antenna on there, it would probably benefit to have an extra big plane. the pcb is small enough the cost won’t be much higher.

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