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Arduino-powered turntable plays moon phases

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While this turntable can’t play “Dark Side of the Moon”, it certainly can tell you which way it’s facing! This project by Yingjie Bei and Yifan Hu uses an Arduino to position a turntable and associated light source in such a way that the moon replica mounted on the turntable will be illuminated to demonstrate the current moon phase.
via Dangerous Protoypes 

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