> Curious -- is this how an optical mouse works? > I think I'll go google for a bit... No, mice use little TV cameras, and take pictures. At least that's what I'm told. Anything video-optical is going to have a lot of trouble living underneath a car. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist