[Andrew Schreiber]

Also, if you use just a small display such as what is in the old digital clocks it is possible to use 4 digital outputs. The display itself is relatively cheap, we bought the one we used from digikey for a buck or so. It would give feedback. But it would not be anything fancy or nice like i think you are describing. From a simplicity and cost standpoint however i think it would be just as useful.