Hi All -
I'm trying to figure out the best way to control 200 LEDs - each individually. They're arranged in 5 groups of 40, so this is almost definitely a job for a mega128.
One simple method would be to have a bunch of shift registers/latches. Load the registers for one set, clock 'em in, then on to the next set. That tends to add up to a whole lot of additional chips though. With 8-bit registers, that's 5 chips per group. Gah.
To continue that thought, maybe a PLD of some sort. One of the CPLD ones with a huge pin-count - x pins in, 4 pins for group select, and 200 for the LEDs.
So, ideas ?