The Das Blinken Top Hat was an awesome gift built by Diana Eng and David Clausen and given to Nathan and Alicia at their engagement party. As the hat is tilted it lights up with rotating effects. Das blinken top hat combines white LED strips, a small Arduino Pro Mini and an accelerometer to get a pretty nifty effect.
Checkout the full tutorial here.
- /firmware - Example sketches to control the LEDs
The hardware is released under Creative Commons Share-alike 3.0.
All other code is open source so please feel free to do anything you want with it; you buy me a beer if you use this and we meet someday (Beerware license).