Joshua and I worked to create a battery powered LED sign controller for a motorcycle helmet using an AVR microcontroller and 85 LEDs poked through a piece of cardboard in a 5 row by 17 column matrix.
Joshua designed the LED matrix for each letter of the alphabet on some notebook paper and then and wrote the C code for each letter.
I wrote the C code to play the phrases and do the scrolling and light the LEDs and manage the button presses to change the phrases.
Steve Karg Birmingham, Alabama, USA