![]() On a RPi4B those pins are electrically commoned with the power input contacts of the USB-C socket. You can power any RPI through those power pins. As powerful and as useful as they are, the GPIO pins on the Raspberry Pi can be tricky to work out. The 40 pin GPIO header has both GPIOs and power pins. Updated Electronics Guides This resource will help you understand the Raspberry Pi’s pinout and make your life easier when dealing with the GPIO pins. You cannot power a RPi though signal pins. Perhaps I'm misunderstanding terms being noted in these posts, but regardless just thought I'd be helpful and point out that it does work. Here's another thread on this forum where it also mentions it isn't possible through the GPIO pins. Second post in this thread specifically reads, "You can't power the Pi via the GPIO. In this very thread and others (link below to another topic on this forum). After all, that's how the official PoE HAT does it. ![]() It's common knowledge that the Pi 4B can be powered via the "GPIO" header if you supply a stable 5V with sufficient current to the correct pins. ![]() ![]() Thought I'd post this here since it took me several hours to figure out, and a lot of folks saying it wasn't possible with Pi 4B to direct power through the 40 Pin GPIO.
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