[youtube= [Kyri] has made a simple circuit to do color detection using an RGB LED. Simply set the LED to the color you want to detect then wave the object over it. Another LED will light up if the … ...

D. Osorio 1,*, A. C. Smith 2, M. Vorobyev 3, H. M. Buchanan‐Smith 2, Detection of Fruit and the Selection of Primate Visual Pigments for Color Vision, The American ...