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Secret-Knock Gumball Machine

By Steve Hoefer
12/18/2012 @ 10:57 pm

Make a cute candy vending machine that only dispenses treats when you knock the secret rhythm on its front panel. Read more »

Solar Tracking Platform

By Thomas Hughes
12/18/2012 @ 10:35 pm

Use a solar-powered motor and a shade to follow the sun, maximizing its energy. Read more »

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