Powering the Raspberry Pi?
20180315/DuckDuckGo raspberry pi power supply voltage board
Oh, interesting. You can also power the Raspberry Pi via the 3.3 volt outputs, with some more caveats compared to using the 5 volt input.
20180315/https://raspberrypi.stackexchange.com/questions/1617/how-do-i-supply-power-through-the-gpio
- UPDATE 2019-12-04: That is not recommended, however. Rather, you should put the 3.3 V power on the 5 V outputs and that will also work, while providing 3.3 V power on the 5 V power supply rails.
Okay, so there are other recommendations here too. Use a 12 volt (12 V) input for other electronics in your system that you step down to 5 volts (5 V) and feed through the USB input to power the Raspberry Pi.
20180315/https://www.modmypi.com/blog/how-do-i-power-my-raspberry-pi