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Power through 5v GPIO

Posted: Mon Jul 09, 2018 6:46 am
by Pietro_il_magnifico
Hello everyone,
i have a question related to power supply. Can i draw power through 5v GPIO? I saw the raspberry pi 3 model b+ schematics (https://www.raspberrypi.org/documentati ... educed.pdf) but i can't find a real motivation of why i cannot.

P.S. i tried to power up through GPIO but i had a lot of problems like: card reader not working and after few days i tried on another raspberry with the same power supply method and i had SD card corrupted

Thanks

Re: Power through 5v GPIO

Posted: Mon Jul 09, 2018 7:11 am
by joan
All the Pi GPIO are 3V3. If you feed 5V into a Pi GPIO you are likely to destroy the GPIO and the Pi.

You can power by supplying 5V to a 5V pin on the expansion header (i.e. supply power to the 5V rail and ground).

Re: Power through 5v GPIO

Posted: Mon Jul 09, 2018 7:16 am
by HawaiianPi
Yes, you can power a Pi through the GPIO header +5V DC and Ground pins.
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pi3_gpio.jpg
pi3_gpio.jpg (88.86 KiB) Viewed 367 times
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Your troubles were likely caused by a poor or inadequate power supply.

Re: Power through 5v GPIO

Posted: Mon Jul 09, 2018 8:09 am
by piglet
However doing that you will bypass the polyfuse that gives you a certain amount of protection.