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.
Photographer Todd McLellan has been on my mind ever since I saw this post on making an Inventor’s Box: a collection of tools and second-hand electronics for kids to disassemble, organize, wreck, rebuild, or reinvent into something completely different… you name it!
In this time-lapse video (or this one), watch Todd disassemble different kinds of machines so that they can be meticulously arranged and photographed. Here are two examples of the final product:

Then view his project, Things Come Apart, where he’s also photographed the same parts “flying” through the air.
McLellan’s photographs seek to challenge our disposable culture by making transparent all the things that we regularly throw away. He said he wanted to get inside the older objects to show the quality, beauty and care that went into the original manufacturing process.
“I hope people think a little bit more about the things they use. Not that people should have feelings for objects, but instead think about ‘reuse and recycle,’ not just ‘use and discard.’ “
The Chicago Museum of Science and Industry is featuring Things Come Apart until May 19th, 2013, or check out McLellen’s new book available for pre-order on Amazon: Things Come Apart: A Teardown Manual for Modern Living.
via NPR.
Related art from parts: One Plastic Beach.