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 ...

This project uses a $30 Arduino Uno R3, an RGB LCD display, a waterproof temperature sensor, food grade heat shrink, and a few other components, all of which are available at the link below from ...

Neopixels, or WS2812Bs, are addressable RGB LEDs , which can be controlled individually by a microcontroller, in this case, an Arduino. The fabric was quilted with a spiral of numbers (3. ...

Where everybody else is sticking to RGB LEDS, they are making a move to a small color LCD screen on the top of the card. Now granted, embedding a few RGB LEDs would overall not add much more of a ...