Re-Designed machine/Image018.jpg

Superbright white LED shines on ball; reflected light from the ball shines on a phototransistor covered with blue filter paper. (Why blue? Because blue is complimentary to orange) e.g white=Red+Green+Blue; Orange=Red+Green.

Depending on the voltage registered by the sensor, a rotary solenoid is activated (or not). When activated, the solenoid rotates 30 degrees and moves a paper flap, which allows the white ball to drop through but the orange ball continues uninterrupted.