Jason S wrote :

> Can you point out a good tutorial on using an optical
> encoder?  I've never used one and I don't know what's involved.

Googling for "rotary quadrature encoder" gave this as one of the
top 10 hits :

http://www.circuitcellar.com/library/print/0303/millier152/index.htm

Pretty OK...

Jan-Erik.

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