Stairs

The new house I moved to had a pretty dark hallway, so I made automatic stair lighting to avoid falling down the stairs every now and then. I used an atmega328 microcontroller, a bunch of wide angle leds, and two ultrasonic distance sensors. I modelled the plastic parts in sketchup, and printed them with my reprap.

Snake

My first led project! I used an arduino, 256 warm white leds, and four "TLC5940" ICs. It had 4 modes: All on (in 256 brightness levels), the game snake, the game pong, and a graphic equalizer (for music). 

The ICs however ended up causing some "glitching" (random flickering) in the leds. I tried everything I could think of, or find on google, to stop these glitches, but nothing seemed to work. I abandoned the project (and the ICs for that matter), and it has since been serving as a nice ceiling light.