Andy Clark saw a clock like this on a children’s television show and decided to build one. His Topsy Turvy Clock has stepper motors connected to two plastic gears which are guided by a microcontroller hooked into an electronic clock. When the Topsy Turvy Clock is turned on, the motors reset the time according to the electronic clock.
-via Hack A Day
You can vote for the clock and some other amazing designs at the Simply AVR Design Contest http://app.snapapp.com/simplyavrcontest
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