TLC5940 Experiments

The TLC5940 is a 16-channel, constant-current sink LED driver.  Each channel has an individually adjustable 4096-step grayscale PWM brightness control and a 64-step, constant-current sink (no LED resistors needed!).  The PWM on the TLC5940 works by counting the number of GSCLK pulses; a setting of 2048 will mean the LED stays on for 2048 pulses and then turns off for the rest of the cycle.  After 4096 pulses, the counter needs to be reset by a pulse on BLANK.

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