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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>
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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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