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.

Posted in Arduino Hacks Tagged emf, led, mega, meter ← Fabricating A Music-controlled Stoplight Shutter Remote For RICOH Cameras → ...

The Air Force Research LaboratoryResponsible for the flexible Arduino board has been led in conjunction with NextFlex, America’s Flexible Hybrid Electronics Institute. The team has now unveiled ...