I have a raspberry pi that I really want to be able to control some motors and was thinking of this one at sparkfun: http://www.sparkfun.com/products/9670
The problem is that the Pi does not have digital ports? And the motor require it for control (low/high signal). Is the GPIO on the Pi just plain analog? If thats the case, is there a addon that could transform signal from the Pi to the motor digitally?