From Device Orchestra:
Knight Rider theme played by an electric toothbrush, two credit card machines and a typewriter.
The electric toothbrush wears a black leather jacket that I made by cutting and editing a used glove. The fingers made great sleeves after I cut off the fingertips.
Of course, the Michael Knight toothbrush needed his KITT, so I made one for him. I installed five blinking red led lights into an RC car and put a battery-powered Arduino board into the car to control the lights.