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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.

The circuit:

Picture: Circuit diagram

Constructions from visitors

Jens K.

Picture: Reconstruction by Jens
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