This is a clock that starts with a selectable amount of leds on. Then every 20min 1 leds goes off.
(Can be used as a sleep timer for autistic kids)
I made a second version of this project. Link
May 28 2007
This is a clock that starts with a selectable amount of leds on. Then every 20min 1 leds goes off.
(Can be used as a sleep timer for autistic kids)
I made a second version of this project. Link