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Hello jorgito,jorgito said:Hello,
Look inside a mechanical PC mouse, or take it appart.
Just a sloted wheel and a couple of ligth sensor arranged so as when one of them is illuminated the other has the light blocked. You can use such disposition to sense the cw or ccw rotation.
Hope this helps
I am surprised of your such quick reply!jorgito said:drill it in its center (I guess 2 to 3 mm) and insert in a custom made axis with the 2 to 3 mm external diameter in a end and more in the other end as you can fasten to the motor shaft.