RGB LED Strip
A RGB LED striplight based on the HL1606 driver chip being driven by an Arduino. The interesting thing about this strip is that, unlike other RGB strips I've played with, you can actually control the LEDs individually. Figuring out how to do that however was tricky since the only specsheet for the HL1606 driver chip was written in Chinese.
By freak happenstance at Maker Faire 2009 I ran into apparently the only english-speaking geek in the world who has made headway in controlling them. After the Faire we've been collaborating on nailing down how the chip operates and I've been able to put together an Arduino library which I intend to open-source so that anybody can control these things.