Newbie level 4
I'm extremely new to this so please bear with me. I'm trying to turn on an LED (4v max.) using one of the digital i/o pins, but the pin is only outputting about 1.5v. The pin is set as an output. I also have a 12v power supply connected to the board to power several 12v push buttons. I have no experience with electrical or C (I'm a mechanical engineering student), so the simpler you can explain this the better. Thank you!