The Mini Mood Light is an interactive and reprogrammable coloured light generator kit. The circuit combines two independent RGB LEDs, four buttons and a micro controller on a small circuit board. Using the buttons you can adjust the colours of the LEDs to express your mood.

The micro controller uses pulse-width-modulation to very rapidly turn on and off the individual red, green and blue LEDs which make up a single RGB LED. Using combination’s of different on-off times allows the human eye to detect a large range of different colours.

The micro controller a MSP430G2211 from Texas Instruments is fully compatible with the TI’s MSP430 LaunchPad development board.

http://partfusion.com/products/mini-mood-light-v1/