I just completed this little device and it’s working pretty well.

It switches incoming AC power on and off in a cyclical pattern, about 1.5 times per second.

A battery powers a small worm-gear motor, which pushes a levered switch with its’ eccentric cylinder. The switch completes the AC circuit.

Simple, I know, but I get kind of nervous when working with AC and I wanted this to be safe and effective. The whole thing is contained in a plastic box, so no chance of accidental contact. This will be a key part in a project for the upcoming Deadline Projects show, Bigger Than Your Life.