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16 X 16 LED grid with 4096 shades of PWM, driven from laptop

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Uploaded on Jun 1, 2011

This is a 16 X 16 LED grid using the TLC5940 driver and two 595 shift registers. A small python script on the laptop uses PIL to do screen cap and scaling and sends the image to an atmel 328p via embedded ethernet on a tuxgraphics board. The 5940 does 4096 shades, but this is 8 bit, 256 shades scaled up to the 12 bits the 5940 needs. Each color value has a gamma/luminescence curve applied to it to help with perception problem with the PWM.

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