Circuit - 1.5V LED FLASHER VERSION B - Circuits designed by David A. Johnson, P.E.

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Last Updated on: 06/18/2009 04:34:29 AM

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Flashers & Blinking Circuits Indicator Circuits

1.5V LED FLASHER VERSION B
To squeeze even more energy from a alkaline battery cell, this circuit adds two transistors to a circuit similar to the above design to boost the efficiency. A small 1.5 volt alkaline N cell should flash the LED for a full year. It too uses a "charge pump" technique to provide a LED the needed voltage.