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Home › Magazines › 2005 › July › Two-Cell LED Torch

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Two-Cell LED Torch

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Published in issue 345, July 2005

This design uses a classic two-transistor astable multivibrator configuration to drive the LEDs via a transformer from two standard 1.5 V alkaline batteries. The operating principle of the multivibrator has been well documented and with the components specified here it produces a square wave output with a frequency of around 800 Hz.

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Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

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