I was inspired by photozz Fireflies - Analog version. I had two 555 timers but didn't have the cd4026b IC. Instead what I had was a sn7447an IC. Even with the help of photozz I still couldn't get it to work. So I started looking for a different way. I found the simplesit LED blinking circuit on http://www.cappels.org/dproj/simplest_LED_flasher/Simplest_LED_Flasher_Circuit.html (note: any metteral taken from the above site is copyrighted to Dick Cappel) From there thru trial and error I designed my simplified Fireflies in a jar circuit. We will keep it simple and only do three LED's for now. Ime working on a 10 LED jar.
3 2N3904 NPN Transistors (Almost any other NPN or PNP from your junk box will work)
3 various resistors (I used 2-10K and a 1-1K resistor try different combos from the junk box)
3 100 ohm resisters (this one is a must or you MIGHT blow your LED's)
3 various capasters ( used 1-2200 UF 2-470 UF one 35V and one 16V try different combos.)
3 green surface mount LED (or any other color or kind)
1 Power supply of some sort. I used a Nokia Type ACP-7U. Out put is 3.7V DC at 340 mA I'm to cheap to buy batteries, and the cell phone for this charger became a dogs chew toy.
Various wires. the thiner the better.
1 mason jar. or some other type of inclouser.
Optional but nice.
DVM or AVM