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 ...

Miller] applied the standard in his decidedly analog self-playing robotic xylophone. Framed inside a fetching Red Oak enclosure, the 25-key instrument uses individual solenoids for each key ...

vibrate more slowly and make lower-pitched sounds. Shorter objects vibrate faster and make higher-pitched sounds. When Xena strikes the bottles with a metal spoon, she causes the bottles and the water ...