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Article #2794Re: How much protection do I need?
From: Michael A. Covington
Date: Mon, 13 Apr 1992 04:31
Date: Mon, 13 Apr 1992 04:31
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I have had no trouble using 7805-type voltage regulator chips as the only thing between the automotive 12V line and the device I wanted to power. Well, maybe put an RF choke ahead of it too... By the way, most of the ripple in the 12V line comes from the spark plugs firing. The _interesting_ way to do a tachometer would be to measure the ripple itself, thereby avoiding any connection to the engine. -- ========================================================================== Michael A. Covington, Ph.D. | mcovingt@uga.cc.uga.edu | ham radio N4TMI Artificial Intelligence Programs | U of Georgia | Athens, GA 30602 U.S.A. ==========================================================================
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Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!emory!athena.cs.uga.edu!mcovingt From: mcovingt@athena.cs.uga.edu (Michael A. Covington) Newsgroups: sci.electronics Subject: Re: How much protection do I need? Message-ID: <1992Apr13.043121.11482@athena.cs.uga.edu> Date: 13 Apr 92 04:31:21 GMT References: <bc338569.82.703134685@longs.LANCE.ColoState.Edu> Organization: University of Georgia, Athens Lines: 13