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

2 thoughts on “Gravitron – ping pong ball LED toy

  1. anachrocomputer says:

    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?

Comments are closed.

Discuss this article with the rest of the community on our Discord server!


Maker Faire Bay Area 2023 - Mare Island, CA

Escape to an island of imagination + innovation as Maker Faire Bay Area returns for its 15th iteration!

Buy Tickets today! SAVE 15% and lock-in your preferred date(s).