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DiscoverCircuits.com
-- Hobby Corner
Last Updated on:
03/19/2008 06:54:11 AM |
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9v Battery Voltage Monitor |
| 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. The 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 Drawing to view PDF |
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