Automatic Power-Off
Published in issue 316, December 2002
This circuit represents a general-purpose automatic shut-off switch. The author uses it in his car to ensure that any lamp left on by accident (boot lamp, interior lamp etc.) does not drain the battery while the car is parked in the garage for a few days. Of course, it can also be used in a large variety of other applications.The operating principle is both simple and effective. The operational amplifier is wired as a comparator.
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Click below to download a PDF copy of this article from Elektor magazine. Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.
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