Take a picture of the most interesting thing on your desk.
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This thing is an optical theremin, it makes noise based on how much light there is, you can wave your hand in front of it to change the sound it makes. I built it at my local hackerspace called fizzPOP in Birmingham, UK. There are more photos of it at: http://www.flickr.com/photos/rb-rt/sets/72157623924680494May 31, 2010 15:01 by rbrt