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Article #19021Re: How Do I Build "Electric Shocker"
From: Norm Strong
Date: Tue, 12 Apr 1988 16:50
Date: Tue, 12 Apr 1988 16:50
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In article <8287@oberon.USC.EDU> garcia@skat.usc.edu () writes: > >What I don't understand is how a DC current can work with a >transformer. I understood that you need an AC current to work with a >transformer, thus there is something I am missing something here. The "something" that you are missing is a chopper, or some means of interrupting the flow of current on a periodic basis. When I was young we used to play around with Model T spark coils. They had a mechanical buzzer on the coil to perform that function. Nowadays, we use transistors to chop the current through the xfmr; when the current drops to zero, the collapsing field around the xfmr generates a back emf that rises until something stops it--like arcover. -- Norm (strong@tc.fluke.com)
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Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!bloom-beacon!mit-eddie!uw-beaver!fluke!strong From: strong@tc.fluke.COM (Norm Strong) Newsgroups: sci.electronics Subject: Re: How Do I Build "Electric Shocker" Message-ID: <3389@fluke.COM> Date: 12 Apr 88 16:50:37 GMT References: <8287@oberon.USC.EDU> Sender: news@tc.fluke.COM Distribution: na Organization: John Fluke Mfg. Co., Inc., Everett, WA Lines: 18