I am powering LEDs off my RPIZero to use as an Ambilight clone. My setup has the LEDs being entirely powered off the GPIO pin 2 (5v)but I have noticed that the far end of the strip seems darker and was wondering whether or not I could add additional power to the strip by also using GPIO pin 4.

Here is the setup I have right now:enter image description here

  • Unless this is a very short strip, which you have not specified, it is doubtful it can be powered from the Pi – Milliways Jan 21 at 21:15
  • don't use the RPi as a power supply ... the Pi can easily become an expensive fuse – jsotola Jan 22 at 2:35

Pins 2 and 4 are both on the 5V power rail. You can consider them to be the same pin. Just as much power will come out of pin 2 as pin 2 and 4 together.

It might be worth connecting 5V power to both ends of the LED strip.

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