Here are a bunch of black and white gears that work together for a mesmerizing effect. As John Edmark explains, two different size gears in a ratio of 3:4 were used to make this piece. The larger gears rotate 75% as fast as the smaller gears. This video shows what PatTurn is all about:
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Oddly satisfying, don’t you think? More info is available on John’s website.
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