LEGO Technic One-Way Gear Mechanism by Jorbs3210
This little device will fool your friends and make them you think that you have supernatural powers (not guaranteed)!

This is the basic idea: there are two axles sticking out of a huge block of LEGO. When you turn one of the axles clockwise, the other axle turns clockwise. But when you turn the axle counter-clockwise, the other axle still  turns clockwise. How? Well, just look through this instructable. The box is made only out of LEGO, you need nothing else. The box is fairly small, and the action is very fluid, it is not at all jerky. This instructable will show how to build the box.
 
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Wyattr55123 says: Sep 4, 2012. 8:29 AM
Make a giant Lego ratchet with that!
TheEngineeringFreak says: Feb 19, 2012. 6:51 AM
Interesting. You should enter this in the Toy Challenge 2.
zazenergy says: Mar 7, 2011. 12:36 PM
Cool! Thanks for sharing.
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