RGB color sensor TCS3200 - is a complete color detector, including a TCS3200 sensor chip, white LEDs. Sensor use interface: Digital TTL. The RGB color sensor TCS3200 can detect and measure a nearly limitless range of visible colors. The TCS3200 has an array of photodetectors, each with either a red, green, or blue filter, or no filter (clear). The filters of each color are distributed evenly throughout the array to eliminate location bias among the colors. Internal to the device is an oscillator which produces a square-wave output whose frequency is proportional to the intensity of the chosen color.