Control 101 LED bar-graph display with AVR
Thomas Scherrer has described his experiments with bargaph display that consist of 101 LED. Because HDSP8820 LED display has specially 10×10 multiplexed LED structure there are only 20 AVR microcontroller pins needed. And of course 1 additional pin if 101th overload LED is needed.
You can download and watch the video of simple demo application, or grab WinAVR source files and build one for yourself.
