Mathematical calculations created with touch and sound… and the help of an Arduino board, contact microphones and solenoids. The Knock Knock was designed by Khalil Klouche as a concept for the “Touch!” exhibition at Lausanne’s Museum of Design and Contemporary Art (MUDAC) in 2012.
Knock on the different operators and it knocks back the answer. Watch. And then check out more inventions of one kind or another.
via Design Boom.
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