Electronic-Geek.com

Hackyhack is a fun project by Dustin Jessen and Chanika Remest that packs an Arduino mini, an LED, a speaker and a piezo knock sensor into a hacky-sack ball. The LED flashes and the speaker emits a sound with every kick, and thirty successful kicks causes a song to be played.

More:

• HOW TO - Make your own hacky sack / footbag

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