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* shift register; microcontroller shifts bits one at a time into a SIPO shift register chip; 1 SIPO output pin per LED (with 4 free microcontroller pins, can drive any number of LEDs)(typically uses a 74HC595 [[Popular Parts]]).
 
* shift register; microcontroller shifts bits one at a time into a SIPO shift register chip; 1 SIPO output pin per LED (with 4 free microcontroller pins, can drive any number of LEDs)(typically uses a 74HC595 [[Popular Parts]]).
 
* mechanically-scanned POV: a linear row of LEDs is wiped across a large area. Each LED is turned on and off with precise timing to generate a 2D image. (p.s.: each LED must be directly driven from the microcontroller or a shift register. "matrix" or "Charlieplexing" does not work in combination with mechanically scanned POV.)
 
* mechanically-scanned POV: a linear row of LEDs is wiped across a large area. Each LED is turned on and off with precise timing to generate a 2D image. (p.s.: each LED must be directly driven from the microcontroller or a shift register. "matrix" or "Charlieplexing" does not work in combination with mechanically scanned POV.)
 
 
[[category:PIC]]
 

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