Power PI Pico with 5V makes it output on VSYS and powers the entire 20V trace with 5V

supermileage / dynamometer-pcb

Dynamometer pcb kicad project

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Open LaPommeCosmique opened 8 months ago

LaPommeCosmique commented 8 months ago

Power PI Pico with 5V makes it output on VSYS and powers the entire 20V trace with 5V.

As a result, the 20V LED turns on the pico is receiving power from the microUSB cable, even when there is no 20V supply going into the board.

Could add a diode or something here (suggested by @JamesZhZhang )

JamesZhZhang commented 8 months ago

Following the datasheet, adding Schottky diode 'D' should fix this

Someone just needs to spec the correct Schottky diode based on the voltages here