Bike wheel strip of LEDs mounted on a bicycle wheel creates LED display

Bike wheel strip of LEDs mounted on a bicycle wheel creates LED display

A thin strip of LEDs mounted on a bicycle wheel creates a semi-transparent screen on which various images and animations can be displayed. The complete circuit (LEDs, microprocessor, battery etc.) is placed on the rotating wheel. A magnetic switch "ticks" the microprocessor every time the wheel has completed a circle, so that the rotation speed (and "zero" location) can be determined
Persistence of Vision. This installation uses a phenomenon known as "Persistence of Vision" to create the illusion of a stationary image. "Persistence of Vision" is the ability of the eye to perceive a series of rapid still images as a single moving image by retaining each impression on the retina for about one-tenth of a second.

By changing the state of the LEDs over 1000 times per second and synchronizing this modulation with the speed of rotation of the wheel, the illusion of a stationary or animated image is created.

Cheesy but effective. I tested two animations on my latest set of software and hardware. Results were pretty good... She said "yes" :-)

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