The Arduino can be powered via USB, power jack or VIN/GND pins.
Does the Raspberry PI 2 offer options for power other than the microUSB connector ?
asked Apr 27, 2015 at 17:37
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1 Answer
Yes.
- You can power it via the ground and 5V pins on the expansion header.
- Once it's booted you can also back power it via the USB (although I doubt that this is sensible).
Both those methods bypass any protection afforded by the 2 amp polyfuse.
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Thank you(+1). Good to know, although bypassing protection sounds like looking for trouble :) Apr 27, 2015 at 18:07
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1@GeorgeProfenza: It is most definitely asking for trouble. If you bypass the polyfuse, you need to make sure than your own circuitry will handle that. It's doable, but a pain. Apr 27, 2015 at 18:08
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@Joan, is it correct that you can theoretically also power the rPi over the 3.3V pin, as the broadcom itself runs on 3.3V? I recall having read this somewhere.– Phil B.Apr 27, 2015 at 18:45
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@PhilB. Yes, the Pi itself only needs just over 3V. The USB ports, HDMI etc. need 5V to work properly. See daveakerman.com/?p=1154 for someone running off 3V.– joanApr 27, 2015 at 18:50