Re: [CAD_CAM_EDM_DRO] Hacking Optical Mice as position/distance encoders

Ian Wright wrote:

> ----- Original Message -----
> From: "Tim Goldstein" <timg@...>
>
> > If you open up standard a mouse you will find 2 low line count quadrature
> you would get 1440 counts
> > per inch in quadrature which works out to just
>
> Tim,
>
> Where do you get the quadrature from, all the mice I have ever opened up
> only have a single optical sensor

They usually have a single sensor comonent, but it has to sense light at two
locations to determine direction. It DOES use quadrature, or there would be
no way to tell which way the mouse is moving.

Jon