“The purest and most thoughtful minds are those which love color the most” – John Ruskin, The Stones of Venice. Colors… Would it be red or green today? Maybe blue — Blue is a deeply sneaky color, my ...

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.

The TCS3200 uses an 8×8 array of photodiodes. The 64 diodes come in four groups of 16. One group has a blue filter, one has green and the other has a red filter.