You can throw a Raspberry Pi camera and OpenCV at the problem and approach it through software, or you can buy an off-the-shelf RGB sensor and wire it up to an Arduino. Or you can go back to ...

Wires run out the far side and through the bamboo stand and connect to a TCS34725 RGB color sensor and an Arduino Pro Micro. The lamp does what you think — hold any colored object up to the ...

Arduino Lilypad, Sparkfun Sound Detector, and Sparkfun RGB and Gesture Sensor. Interestingly, newly created flexible boards remained operational despite extreme stretching. This method allows for ...