Brian Egenriether invented and built a Skittles sorting machine, because he could. It determines the color of each candy and slots it into the appropriate bin.
It uses a BASIC Stamp 2 and 3 servos for actuation. An IR LED and phototransistor are used to stop the turnstile in position. I fabricated may of the parts from epoxy including the body, the turnstile, the chute header, etc. The base is wood and the funnel is from a hummingbird feeder. The rest is made from telescope parts and PVC.So you are no longer bound to "taste the rainbow" if you really prefer just the yellow ones. (via Laughing Squid)