[Don Wright]

Whats wrong with encoders or hall effect sensors?

There could be a problem if you are trying to use a lot of encoders. i.e. two shooter wheels running at ~2000 rpm, and 4 drivewheels and whatever else. You "could get the red light of death" as our programmer calls it when you are servicing interrupts so often...

I found this and are thinking about taking a look at it... Anybody have any experience with it?

http://www.eidusa.com/Interface_Boards_F_to_V.htm