I am using Raspberry Pi 3 with Raspbian OS. I will be powering my Pi 3 board from a output of 24V battery. So I will be using a 5V/3A buck converter. I will be connecting my GPS, Pi camera and 4G Dongle to Pi 3. Apart from that gyroscope, accelerometer and temperature sensors are connected to it through GPIO pins.

Is it safe to power Raspberry Pi3 with 5V/3A buck converter?

Suggestions welcome

  • 1
    Yes - why would you think otherwise? – Jaromanda X Aug 10 at 8:28
up vote 2 down vote accepted

Yes, it is perfectly safe.

You lose two protections so take care.

  1. The microUSB socket is keyed so you can't mix up +ve and -ve. Take care when connecting.
  2. The microUSB socket feeds into a polyfuse which limits current to an amp or so. This mitigates against fire risks in the event of some faults. Perhaps add your own fuse.

Alternatively you could wire the power into a microUSB plug so you could keep the above two protections (I power via the expansion header).

I am using a similar setup with a 12V power rail (from mains with a 12V power supply - not a battery) with a 5V/3A buck converter to power a Pi 1B for more than 3 years now without any issue. Also used this setup with a Pi Zero, Pi 2B and most recently Pi 3B+.

The only suggestion I have is to not power the Pi over the microUSB port but directly over the 5V and GND GPIO pins. Also adjust the output voltage PRIOR to connecting the Pi. You can also install a fuse if you want to feel safe.

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