Working on an Arduino project for a magazine article. Was just about working right, and I decided to make a small change in the program. Now it's completely doing nothing like it's supposed to. "What?" Unmade the change and it's completely naff. Fiddled around with it for quite a while before I noticed the outputs of two of my IR detectors were always low. "Hmm, there's no VCC to these two."
A stupid wire on my breadboard had gone bad!?!?! Replaced the wire and the changed program works as I expected it to work hours ago. Who'd have thought a program change would cause a wire to go bad