Difference: BlingBlingFunktionsweiseEn (4 vs. 5)

Revision 52016-03-30 - PeterSchmid

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META TOPICPARENT	name="EWheelEn"

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Mode of Operation

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Thanks to the stroboscopic effect, the impression arises, that the image is motionless. The LEDs have to be turned on and off in time with the wheel rotation. One full wheel rotation takes about 750 ms at 10 km/h velocity, at 100 km/h it takes only 75 ms (supposed circumference is about 2.1 m for a 28" wheel). The radial distance between two LEDs is 2" (5.12 mm), the supposed tangential distance is the same for the same tangential and radial resolution. At maximum velocity the switch on period for a LED is 270 us. There have to be 96 LEDs (32 LEDs times 3 colors) switched in this period. That means there is only 3 us time for single LED.

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Thanks to the stroboscopic effect, the impression arises, that the image is motionless. The LEDs have to be turned on and off in time with the wheel rotation. One full wheel rotation takes about 750 ms at 10 km/h velocity, at 100 km/h it takes only 75 ms (supposed circumference is about 2.1 m for a 28" wheel). The radial distance between two LEDs is 2" (5.12 mm), the supposed tangential distance is the same for the same tangential and radial resolution. At maximum velocity the switch on period for a LED is 270 μs. There have to be 96 LEDs (32 LEDs times 3 colors) switched in this period. That means there is only 3 μs time for single LED.

circumference for 28" race wheel
C = 2.105 m

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