The principle behind [TechMartian]’s approach is simplicity itself: shine different colored lights ... you know the color of the object. Their sensor uses a four-lead RGB LED, but we suppose ...

[Fjord Carver] brings together an RGB LED and CdS Photoresistor to make a color sensor. Those Cadmium Sulfide lights sensors usually have a very wide swing of resistance when exposed to varying ...

The Philips Hue A19 light bulb comes in a variety of options. This LED bulb is capable of both white and color ambiance, offering both warm-to-cool white and millions of colors straight out of the ...