The matrix is orgranized in 8 rows and 16 columns (8 red and 8 green). To address a single LED in the matrix, you have to set one of the 16 column bits and enable the coresponding row.The rows are handled by an ULN2803, an array of darlington transistors. The shift registers are used to provide column data. 16 bits are are loaded serially and put out parallely.[more]

This AVR Startup Project will create a rolling display pattern using up to 8 Light Emiting Diodes. But more importantly, this page demonstrates how to set up and run a basic program using the power ATMEL AVR development kit. It was one of my very first AVR programs, and one might say it is the hardware world’s equavalent of the “Hello world” program.[more]