They’re basically an electromagnetic cuff with a metal slug in the middle ... witch then strikes the xylophone key. Using a MOSFET and a protection diode, actuating them is as simple as ...

Want to play the xylophone but don’t want to learn how? [Rachad]’s automatic xylophone might be just the ticket. It uses homemade solenoids to play tunes under computer control. Think of it as ...

8 identical glass bottles, jars or glasses 1 wooden or metal spoon Different coloured paint or food colouring Water jug ...