Article View: sci.electronics
Article #5318Re: Circuit for Auto Flasher? (Not difficult at all !)
From: collie
Date: Sat, 28 Jul 1990 05:24
Date: Sat, 28 Jul 1990 05:24
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1836 bytes
In article <10960031@hpldola.HP.COM>, ppa@hpldola.HP.COM (Paul Austgen) writes.
>Does anyone have any schematics for a ciruit that would
>substitute for the flasher in automobile turn signals? It seems
>like a simple enough problem at first, but you would acutally
>have to sense current in the circuit that you were flashing off,
> I think.
>Thanks, Paul
Hi Paul,you can use a timer (555) oscilating at some low frequency
with the timer output driving a transistor,thus causing the bulb too flash at
the frequency at which the timer is oscilating at. Then again you would have
too regulate the input voltage for the little circuit,as the running engine and
alternator puts out some nasty spikes enough too kill the timer (555). Then by
turning on the power to the circuit will cause the light too blink on/off until
you turn off the power switch.
Good luck !
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collie
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!sdd.hp.com!zaphod.mps.ohio-state.edu!sunybcs!ubvmsd.cc.buffalo.edu!v105l4lg From: v105l4lg@ubvmsd.cc.buffalo.edu (collie) Newsgroups: sci.electronics Subject: Re: Circuit for Auto Flasher? (Not difficult at all !) Summary: Very little Keywords: Timer (555) Message-ID: <31681@eerie.acsu.Buffalo.EDU> Date: 28 Jul 90 05:24:03 GMT References: <10960031@hpldola.HP.COM> Sender: news@acsu.Buffalo.EDU Reply-To: v105l4lg@ubvmsd.cc.buffalo.edu Followup-To: Sci.electronics Distribution: na Organization: Robotic Lunacy Lines: 25 Nntp-Posting-Host: ubvmsd.cc.buffalo.edu News-Software: VAX/VMS VNEWS 1.3-4.1