When you need to quantify the color of an object ... or you can buy an off-the-shelf RGB sensor and wire it up to an Arduino. Or you can go back to basics and build this reflective RGB sensor ...

Note at this point that actual system performance will depend on many factors, including sensor orientation, object size, shape, color, and reflectivity ... Now is the time to see the sample code ...

When the cards are inserted in the lock, a TCS230 color sensor interprets the pattern on the cards and sends the information over to an Arduino Uno ... First, the code can’t be “stolen ...

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 ...

The system also uses Arduino IDE software to write, compile and upload sketch codes for the system ... the two DC motors in the setup moves the color sensor across the solar panel for color ...