This is a ceiling fan that has LEDs attached to the fan’s blades.
When the fan rotates a scolling message is displayed and can be as long as 999 characters. The control circuit uses a microcontroller that was developed here in Austin. The last prototype was displayed at the Austin Maker Faire 2008 and this design has many improvements.
Visitors are welcome to type in a message and watch it appear on the sign through the magic of radio waves.
Maker website: ceilingfansign.com/
Maker name: Buck Stein