Eternal flasher

Low power circuit for eternal flashing

This circuit was designed by Burkhard Kainka and is intended to generate flash pulses from a single 1.5V cell for years. The voltage for the LED is doubled with a charge pump. My setup has been running for over a year now on a used micro battery.

Picture: Circuit board
Picture: Bottom side

To reduce the size here are some resistors soldered as SMD1206 on the bottom side.

Picture: Etched circuit board

At a later point a matching printed circuit board with wired components was created. It can be downloaded down below.

The circuit:

Picture: Circuit diagram

Constructions from visitors

Jens K.

Picture: Reconstruction by Jens