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Article #428Re: Headlight Reminder Circuit Wanted
From: John Whitmore
Date: Tue, 03 Nov 1992 22:02
Date: Tue, 03 Nov 1992 22:02
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In article <davej.40.0@gmuvax2.gmu.edu> davej@gmuvax2.gmu.edu (David F. Juraschek) writes: >This is probably a very beat up old horse, but does anyone have a >simple circuit they could post for an automobile headlight reminder >circuit? The standard trick is to connect from the switched +12V on the instrument panel to the (+) lead of the headlamps; if the headlamp terminal is more positive than the switched +12, a buzzer (low-current type, connected in series with a diode) goes off. The buzzer has to be a low-current type because the current it draws is set by the quiescent draw of the instrument panel, which is the current sink for the circuit. Auto shops often sell a small kit for this purpose, complete with fuse-block connectors and instructions. John Whitmore
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Path: arc1-ca.pugleaf.net!sparky!uunet!ogicse!news.u.washington.edu!carson.u.washington.edu!whit From: whit@carson.u.washington.edu (John Whitmore) Newsgroups: sci.electronics Subject: Re: Headlight Reminder Circuit Wanted Keywords: Idiot Reminder Message-ID: <1992Nov3.220234.23476@u.washington.edu> Date: 3 Nov 92 22:02:34 GMT Article-I.D.: u.1992Nov3.220234.23476 References: <davej.40.0@gmuvax2.gmu.edu> Sender: news@u.washington.edu (USENET News System) Organization: University of Washington, Seattle Lines: 17