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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
Battery Monitor Circuits |
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9v Battery Voltage
Monitor using a LTC1440 Comparator
(June 30, 2006)
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| Nine voltage batteries
are used in a wide variety of electronic devices. But, you often don’t know
when it is time to change the battery until the device stops operating. The
hobby circuit below provides a visual indication when the battery needs to be
replaced. It uses a neat IC from Linear Technology, which contains a very low
power voltage reference and a voltage comparator. This hobby circuit is
designed
to turn on a LED indicator light when the battery voltage drops below 7.2
volts. |
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Click on Circuit Below to view PDF of Schematic |
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