I hope my question makes sense. I just pruchased a dsd-tech usb to ttl adapter (cp2102 based). It has 3.3v and 5v pins. Is it safe to use the 5 pin to power my pi3 or should i go through micro usb as usual?

amazon link dsd-tech controller link

Thank you!

  • 2
    I'm sure you'll get a more detailed answer shortly, but the power port has some over-voltage protection or some such that the GPIO does not. Otherwise using GPIO is fine.
    – Tomas By
    Dec 1, 2018 at 19:31
  • @TomasBy, GPIO is not used for powering the RPi ..... the power pins in the header connector are not part of GPIO
    – jsotola
    Dec 1, 2018 at 21:07
  • "40-pin GPIO header".
    – Tomas By
    Dec 2, 2018 at 5:09

1 Answer 1


No. USB ports can only supply 500mA (maximum); many adapters less. The Pi needs more current to run reliably.

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