[youtube http://www.youtube.com/watch?v=Ez3JnTUxack?hl=en&start=0&fs=1&rel=0&showinfo=0&ap=%2526fmt%3D18&w=600&h=481]

This neat experiment uses a Teensy development board, an MMA7455L accelerometer, and an OLED display to show a cube in three dimensions.

The acceleration sensor MMA7455L is used to measure the direction of the gravity vector to rotate a cube accordingly.

[Via Dangerous Prototypes, thanks Ian!]