Psychedelic Sphere of LEDs
The friend of a performer created this optical light display of 256 LEDs that can be programmed to create some fascinating displays. The ball has 16 panels, which are not only the circuit boards, but the structural support of the ball as well. The central brain is provided by an Arduino powered by two AA batteries. For more information, see the full project details (the site may be temporarily down).
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[original story: Hack n Mod]