I'd like to make a coffin for next halloween that rattles and has audio play when anyone walks past it. I've got ptc circuit for audio and I have an idea about using a cam and motor for the rattling door but is there a way I can get the audio circuit to work with the motor controls? I was thinking maybe there might be a device that could replace the push to close button on the audio. One where when power is supplied by the control unit to the motor, the divice will close the circuit on the audio divice so it plays the audio at the same time. Failing that I could just set it up so the cam hits the ptc button but then I'd have to pad out the area where the cam makes contact with the door which might ruin the effect