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This is a nice article on how to identify and extract rotary encoders. It then explores how to decode your rotary encoder and has a little lesson on Quadrature Encoding. It does not go into extreme detail, but there is a lot of useful information.

Some recent stereos do, especially ugly boom boxes and (non-ugly) car stereos, typically for the digital tuner knob that can rotate forever and ever. And fortunately, I have some of each in the junk bin.

More about Rotary Encoders

Marc de Vinck

I’m currently working full time as the Dexter F. Baker Professor of Practice in Creativity in the Masters of Engineering in Technical Entrepreneurship Program at Lehigh University. I’m also an avid product designer, kit maker, author, father, tinkerer, and member of the MAKE Technical Advisory board.


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