Led Scroller Matrix, ATMega48-based
A charliplexing-driven 47x8 led matrix made with an atmega48p. With only a few resistors and ~400 leds it’s a pretty decent scroller board* to display messages or act as a pixel-driven screen (but also a little bit tedious to solder by hand!).
Can also be controlled via I2C and includes native scrolling text capabilites on the firmware.
(*): Probably not
- Github repo with more documentation
- Project page on hackaday.io with more documentation