Noiseboard

Scrolling Color LED Sign

The Prolite PL-M2014R is one of those signs in delis and head shops. It's pretty cool. It can be programmed over a RS-232 serial port and a PC running Linux. The serial protocol is documented online and printed on paper in the space.

There's a more in-depth tutorial from Linux Journal. There is a Dell Latitude D630 in the space that has a physical RS-232 port in the back and can boot from a Knoppix CD-R.

Here's a demo of the sign.