A multi processor PIC computer :-) ftp://panteltje.com/pub/multi_processor_PIC_LED_color_controller_hardware_img_2002.jpg
I modified my LED color controller a bit so it has 3 independent hardware PWM channels. One PIC is the master, is controlled via ethernet, and its PWM unit drives blue. It forwards the other color levels via very fast RS232 to 2 other PICs, one does the red pwm, and the other one does the green PM thing.
There are 4 clocks in this system, 25 MHz for the ethernet controller, and 3 x 64 MHz internal clocks for the PICs.
I was watching the LED strips for interference, you can see it on the scope, but not in the light output.... PWM is about 15 kHz, 8 bits resolution, probably with harmonics up to...... Anyways, multi-processor PIC is here :-)