Wednesday, February 16, 2011

1.5 V LED Flasher

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)

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