Animated Disco Coaster
Instructables member ebenupton decided to cheer his Las Vegas-loving wife up by by making an animated, brightly lit drinks coaster.
The coaster can be driven from any PC with a serial port and will display any 10 by 10-pixel video you wish.
Here’s a demonstration video of the coaster:
And another demo clip with a glass on top of the coaster:
Head over to Instructables for instructions on how to make one for yourself.