Lego ratchet

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Copyright 1996, 2000, Denis Cousineau

 

Lego ratchet

A ratchet is quite easy to build using Lego pieces. The following design is borrowed from Dave Baum's book (see references and links on the side):

How to make it

How it works

This is pretty simple. The red beam is free floating. Therefore, with the little amount of friction available, how the input turns can rotate the red beam toward the left or the right output.