Make: Online : Gravitron - ping pong ball LED toy

Gravitron - ping pong ball LED toy

Marcus wrote in to tell us about his latest ping pong ball electronics project, the Gravitron. In half of a ping pong ball, he's crammed 12 LEDs, an accelerometer, and an ATmega168 for a brain. If you pick it up and tilt it, it will light the highest LED. It's sort of poetic.

If you're as impressed as I am with his efficiency of space, check out Marcus' other ping pong ball experiments on his blog.

Gravitron - Playing around with gravity

Comments

Oldest comments listed first.

Posted by: anachrocomputer on December 26, 2008 at 4:28 PM

Size of a ping-pong ball

I have some ping-pong balls here that I drilled for LEDs. They're 40mm diameter. Presumably, this is a world-wide standard size. Or do sizes vary around the world?

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