From the Arduino blog - a new and easy way of adding lights to any Arduino project :

BlinkM is a new smart LED from ubiquitous computing consultancy ThingM. It can smoothly fade to an RGB- or HSV-specified color, randomly fade between nearby colors (for mood lighting), or play back a number of canned, and a single saved, sequence. The compact package contains a bright RGB LED and an AVR microcontroller, and can be connected directly to an Arduino USB board with no additional components. BlinkM is controlled via I2C and up to 127 can be connected to a single Arduino board (or other microcontroller). See the datasheet for details. There’s also sample Arduino code available for talking to them using the Wire library, and a cross-platform application for graphically creating a color sequence. This is a great way to easily and quickly create cool lighting with an Arduino, and without the use of many pins or much code. You can get a BlinKM for $12.95 from Sparkfun.

[From BlinkM Smart LEDs and other cool new hardware.]

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