It's an idea that I've had in my had for a while, a simple way to detect when a target has been successfully hit. The concept is fairly simple: a target in which a successful hit can be detected by a momentary shorting of two conductors. The target is composed of two conducting layers separated by an insulating layer. When a metal projectile passes though the target, a momentary connection is made between the two conducting layers though the passing projectile. A microcontroller or other devices is connected and provides some sort of indication if a momentary connection occurs.