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I am working on setting up a Pi3 and have a screen attached its currently taking up all the 3.3V outputs. Is it possible for me to change the settings on say GPIO 16 (pin 36) to become a 3.3V output?

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Reset to default
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Yes, change the GPIO to mode OUTPUT and write 1 (high). The GPIO will then output 3V3 relative to ground.

Note that the GPIO will only safely supply about 16mA.

I should say that a better solution would be to tee-off power from one of the 3V3 power rail pins (perhaps by carefully soldering a wire to the underside of the board).

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  • Thanks, i was able to set it to high and get my humidity sensors powerd!
    – user72089
    Commented Aug 20, 2017 at 17:32

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