RBG LED Used in Color Detection Circuit

The color detection circuit is capable of determining the color of an object using RGB LED.

The process takes place by shining light of a certain color on the object and the color of the object can be determined by looking at the amount of light reflected back. Along with a PIC16F887 microcontroller and RGB LED are the standard red LED, resistor, and photoresistor. In order to have a wide range of color detectors, only the microcontroller and RGB LED are needed. A microcontroller will not be required when detecting one color thereby requiring only bright LED to be detected. When the right color is detected, the standard red LED as indicator lights up.

A PWM signal is used to externally power the RGB LED. For preventing the ambient from getting in, an electrical tape is placed around the photoresistor which lets only the light directed above to be detected. The color spectrum of the RGB LED is varied using the built-in potentiometer on the development board. This color detector can be used for cool projects like separating legos by color, sorting M&Ms;, robotics and as an aid for color blindness.

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