USB & Vin Power@ sametime on NANO. CAN IT HARM THE BOARD?????

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i wondering, if having the usb , vin on nano board connected @ sametime, if can harm anything?? read should not! know?? should choose between higher of voltage inputs, right??? if upload sketch too?? harm then????

perfectly safe.

note schottky diode prevents power flow +5v usb port, usb not concerned.  note ft232 chip powered +5v, not usb port side of schottky, operative when there no usb power (and provides minor 3.3v supply).

the real concern multiple power sources, has been sudden connection of live 5v supply "vcc" port of arduinox can harm regulator charges vin reservoir capacitor, nano not have such capacitor, not problem in case.


Arduino Forum > Using Arduino > Project Guidance > USB & Vin Power@ sametime on NANO. CAN IT HARM THE BOARD?????


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