We all love blinky lights. What we love even more than blinky lights is a very detailed tutorial with great photos. [Richard Kline] has written this fantastic tutorial on how to build a large 5x7 LED matrix and control it with a PIC processor.  The bulk of the body is a foam insulation board, covered with a diffuser. Source code and schematics are available for download from the site. If you've … [Read more...]