Does anyone know where I could buy a cheap motion sensor which outputs x & y coordinates of the object in motion?
What I am looking for is similar the to modules found on a ps2 optical [u]mouse[/u], but I need one that reads out a little further . . . say up to 1-1/2 inches or so.
I have searched the internet a little, but I have not done well sofar.
Thanks for any help or ideas you may have.