This is a pretty simple, clever way of controlling sound by creating these pins wheels with holes in them that spin over light sensors and change frequency and modulation as light levels change. Different wheels can be swapped out.
SpinTronic
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Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. His free weekly-ish maker tips newsletter can be found at garstipsandtools.com.
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