After being inspired by a commercial product, David Hsieh has created an interactive lighting system that changes colour temperature depending on the time of day. The purpose of this is to help maintain sleep patters by being exposed to more natural types of light throughout the day (or evening).
The system uses an LED light strip controlled via an Arduino that also has a Bluetooth shield - which works in conjunction with an iOS app so the lights can be controlled manually from an iPhone or iPad (or other device if necessary).
An interesting concept, and perhaps useful to the night-owls out there. If this is you, visit David's website for complete details and app code. And for more, we're on facebook, Google+, and twitter - so follow us for news and product updates as well.
If you're looking to make your own colourful LED-based project, consider our Freetronics RGBLED: full colour module. It includes a bright RGB LED on the top of the board and a WS2801 constant-current, addressable, multi-channel LED driver on the back. This smart module can be daisy-chained, so you can connect a number of these together in a string and drive each of the module colours individually from your microcontroller. For more information and to order, visit the product page.