Comment Open source LED controller (Score 1) 453
This is a little project I did, specifically for controlling a large number of LEDs for ambient information (CPU load, music visualization...). It connects to the serial port, and can control up to 72 LEDs with variable brightness.
I was planning on making kits for this available if there's interest, but that's on hold until I finish a new design (thousands of LEDs, true color, USB).
There is hardware info, source code, and photos at the project web page.