If you’d like to get more specific, Michael Klements’ Arduino-based scanner lets you quantify colors in numerical RGB values via a TCS34725 sensor. User interface for the handheld device is ...

[John Crombie] had a crack at building one using linear Hall effect sensors and magnets ... On the electronics and interfacing side of things, [John] utilises the Arduino pro micro for its copious ...

Researchers from the University of Johannesburg in South Africa have developed a cleaning system for solar modules based on the TCS3200 color sensor and the Arduino Uno open-source microcontroller.