January 29, 2010, 5:59 pm
Filed under: Product Design, security/safety, technology | Tags: , , ,

Spoke POV is an easy-to-make electronic kit toy that turns your bicycle wheel into a customized display. SpokePOV works kinda like a cross between a LED ‘propellor clock’ and a bike odometer. Like the odometer, there is a hall effect sensor and a magnet. Every time the magnet passes by the sensor, the sensor sends a pulse to a microcontroller. The microcontroller counts the time between pulses and uses that information to turn on the LEDs so that as the wheel rotates, the LEDs are always lit in the same location. Because the LEDs are really bright we see a streak when they move. Since they’re moving really fast, the pattern of LEDs ends up looking like a persistent/enduring image. Thats why its called “persistence of vision”, or POV for short.

via:: Ladyada


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