Why did my lm317 stop working?
I am building an lm317 power supply that has a 510 ohm resistor and a 10k potentiometer. For power I have a 12v 1A wall wart (really more like 14-15v ). I built it on a breadboard and then from there moved it to a pcb (the pre cut kind from radio shack) and everything went fine. However when I tested it before i closed up the project box, it would only supply about 14.06v to 15.22v. Im not sure what is wrong, all the connections look fine and nothing really changed from when it worked.