Lights! Camera! Action!
Step 1: Tools
5)knife (or wood carving knife)
6)1, 3, 6 and 7mm drill bits;
7)drill stand or dremel tool;
9)solder or soldering station;
Step 2: Schematic and PCB
The heart of this schematic is timer LM555. It generates square impulses which width is regulated by variable resistor or potentiometer (it really doesn't mater which will be used).
Light board can be made from as many LEDs as you want. Starting from 3 LEDs and increasing by 3 (for example it can be 3, 6, 9, 12. 15 and etc.). I have chosen 60 LEDs for brighter light
I have uploaded my schematic and PCB in Eagle and .pdf formats. My main board is really small. You can make it smaller if you use SMD parts but it's necessary. LED board is 87x57mm size (perfectly fits into my case).