I need to determine if two wires are coming into contact with each other. I'm going to be moving my satellite dish back and forth and I plan on using this method to tell the motors when to stop moving one direction. I'll mount one of the wires to a stationary support of the dish and then the other wire to one of the arms that move. When the two come into contact I'd like to be able to do "x".
What's the easiest way to do this with the brain?