This board is designed to make it easy to drive 40 LEDs arranged in 5 columns of 8 rows. You can connect these together to add virtually as many columns as you need. For example, use 16 boards and you'll have an 8x80 LED Matrix which could serve as a nice sign!
Bill of Materials
This project is © Jayson Tautic - TAUTIC ELECTRONICS LLC, and is published under the terms of the Creative Commons Attribution-ShareAlike 3.0 Unported licence.