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DiscoverCircuits.com -- Hobby Corner
Last Updated on:
Tuesday, June 01, 2021 03:06 PM
Hobby Circuits List
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LINK to Dave's circuit, but DO NOT COPY any files to your WEB
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More
White LED
Circuits Driver Circuits |
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3V BATTERY
POWERED WHITE LED DRIVER |
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circuit below will drive any LED color, including white LEDs, using a DC power
supply ranging from 2v to 3.3v. White and blue LEDs normally require over 3v,
so the circuit below uses a charge pump scheme to deliver a constant LED light
intensity from a voltage less than 3v. The LED is rapidly pulsed with 3ma peak
current, which remains fairly constant, even as the battery voltage changes.
This hobby circuit is designed
only for low LED current applications. A common
CR2032 lithium coin battery should run the light for two days. A pair of 2.5
Amp-hour AA NiMH
cells should operate the circuit for nearly a month. |
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Click on Circuit Below to view PDF of Schematic |
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