Mark Jenkins wrote: > >> I am in need of some advice regarding the possibility of using a >> pic16f84 or any other kind of pic to sense the speed of two seperate >> wheels. What I would like to do is to be able to turn a led on if the >> speed of one wheel increases to a speed of say for example 10% over >> the other. My Ford already has this. It applies the brakes (pulsed) to the faster wheel - it's called traction control. Jim Nagy Elm Electronics ICs for Experimenters http://www.elmelectronics.com/