Batlamp

Features include:
* Arduino controlled so it can blink in different speeds, colorfade, etc. AND you can reprogram it to make whatever you want.
* Three pots to set the red, green and blue LEDs.
* reprap printed knobs for the pots
* Osram RGB LED (almost perfect point light source) with 30mA per color.
* exchangable stencil
* one rotating axis to project onto a wall or the ceiling.

more pictures: http://www.flickr.com/photos/wizard23/