That part is now long out of production, so [Dillon] has implemented the LM3909 circuit using discrete ... Well, he wasn’t able to make a 555 flash the LED from a coin cell, and a friend ...

What [Manuka] gives us is a circuit that is designed to be built ... Got a cool tip for flashing LEDs, blinkenlights, 555’s, or any odd thing that strikes your hackers fancy?