I used Meccano to support this construction.

It consists from a Stepper Motor, a few electronics and some Meccano plates and stripes.

I am very impressed that all I have to do is to turn the handle as slowly as 20rpm for the LEDs to glow.

There is also a 10 second video on “You Tube” at

http://uk.youtube.com/watch?v=q7xDCh_-1Ys

Kostas Bozikis (www.bozikis.co.uk)