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How to build a toilet-flushing Lego robot

Evan Blass
September 28, 2007
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We were always a little wary of bringing our Legos into the bathroom, but if you've got no such baseless fears, BattleBricks has published a handy how to on building one of those fancy auto-flushers you see in some of the finest washrooms worldwide. Using only parts from a standard NXT Mindstorms kit, Will Gorman rigged up a contraption that employs the ultrasonic sensor module to detect the presence and then absence of a bathroom-goer, and also features a dedicated button to perform a Rube Goldberg-esque manual flush. Keep on reading for a thankfully-SFW demo vid of the so-called "RoboFlush"...





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