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Circuits designed by David Johnson, P.E.

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Last Updated on:  06/17/2009 03:29:21 PM

Flashers & Blinking Circuits    Indicator Circuits

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1.5V LED FLASHER VERSION A
Many published circuits that flash LEDs need 3 volts or more. This circuit uses only a single inexpensive C-MOS IC and flashes the LED for a full year on a single 1.5 volt AA alkaline battery cell. The circuit uses a charge pump technique to provide the LED the needed voltage.

Circuit 1.5 LED Flasher Circuit, version A designed by Dave Johnson, P.E. (June 4, 2000)

Flashers & Blinking Circuits    Indicator Circuits

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