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constant signal to pulse and back?

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=96752
Printed Date: November 03, 2025 at 9:52 PM


Topic: constant signal to pulse and back?

Posted By: maxtadams
Subject: constant signal to pulse and back?
Date Posted: August 29, 2007 at 7:53 PM

I'm installing an air compressor on a 2007 GMC C5500, the compressor has a 12v signal wire that I need to connect to the upfitter connector tap up switch (cruise resume). My problem is the compressor gives me a 12v constant but the cruise wire is connected a latching relay. I need the 12v constant to give me 2 pulses @ 1 second intervals minimum. I did find a diagram for constant to momentary, but I need 2 more pulses when the signal stops to bring the throttle back down to an idle. Any ideas?

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Max Adams



Replies:

Posted By: hotwaterwizard
Date Posted: October 10, 2007 at 9:56 AM

A 555 timer could be used.

This is a Break Flasher Circuit using the 555 timer

posted_image



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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !


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