Digital POV Clock on Hard Drive Platter

I replaced the platter of a laptop hard disk with a circular bit of PCB with digits 0-9 etched in it. LEDs placed behind the spinning disk flash to "freeze" the moving digits in place to form a functioning digital clock.
This is an Arduino project with custom built hardware, which I try to explain in the commentary. More info at http://hotchk155.blogspot.com/2012/02/digital-pov-clock-working-mostly.html
Code and EAGLE schematics at https://github.com/hotchk155/DigiPovClock

Видео Digital POV Clock on Hard Drive Platter канала Jason Hotchkiss