This guide will show you how to use a PicoSwitch in combination with a simple voice recorder to make a radio controlled voice/sound effect box. You can then mount this box into a radio controlled car, plane, boat, robot etc. and have fun triggering sounds at just the right moments. All you need to do is to take wires from the ‘play’ switch of a voice recorder, and connect them to a PicoSwitch. Link.
HOW TO – Make a radio controlled voice box