LED Fader 2 is a project that can control up to 16 outputs, designed for driving LED’s. All 16 outputs are pulse width modulated, providing 256 levels of brightness at a refresh rate of 100 Hz. A script language, designed for controlling the outputs, is provided as well. The program is written in AVR assembler for the ATMega8 and Mega16 microcontrollers from Atmel. Check details on the link below.
LED Fader 2 - [Link]