negative pulse to a longer negative pulse
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=126291
Printed Date: May 12, 2024 at 11:01 AM
Topic: negative pulse to a longer negative pulse
Posted By: madmex
Subject: negative pulse to a longer negative pulse
Date Posted: February 24, 2011 at 1:23 PM
Hola Everybody! I love your website is very interesting all you guya offer here!!! congrats!!!
i've been looking for a specific relay config but i cant find it, i think the closest one i see to what i need is the ''Pulsed to Steady Output (Turn signal output to steady output for duration of turn signal)'' threat, but still confused!!
This is what happens, i have a automatic window module but it wont work because the negative pulse from the alarm is not long enough in order for the automatic window module to perceive... it needs at least 0.4 seconds negitve signal, (timed using the truck's body ground) now, i found out there is a 555 something delay relay that would do the job, however i am in mexico in a small community and i can not buy stuff like that here... but i can get capacitors and relays no prob. So PLEASE if can help me with this i will apreciate very much.
Best regard to all members!!
Replies:
Posted By: tony_g
Date Posted: February 25, 2011 at 3:47 PM
what alarm and what window module do you have installed and what wire is the module currently connected to? dependant on the alarm installed there may be menu options to be able to adjust or alternative wires that could be used. you may get alot more help in the car security and convenience forum as well as there are alot of proffessional installers who help out with posts and deal with most types of alarms and add on modules so would be able to give you alot of options to try without having to look into buying additional parts,i have learned alot from that forum.
Posted By: 91stt
Date Posted: February 25, 2011 at 5:21 PM
we need to know what brand and model window roll up module and security system you are using. From the description I am assuming that you are using the door lock wire to activate the module. Just for clarification, what wire is currently used to trigger the window module?
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This information is provided only as a reference.
All circuits should be verified with a digital multi-meter prior to making any connections.
Posted By: madmex
Date Posted: February 25, 2011 at 7:44 PM
Thanks for replying my question.
I am using the factory alarm of a 2003 ford pick up lobo and in deed i tried to hook the window module to the keyless lock signal, (the one that is too quick-too short). at the moment is workin attached to the interior light door signal, so every time i get off the truck and close the door the windows roll up, which is not so bad, is actually workin pretty good!
however i would love to hook it properly to the keyless lock sistem.
And there is where i need to make that pulse signal last a bit longer!!!
Regards.
Posted By: hotwaterwizard
Date Posted: February 27, 2011 at 1:40 AM
Use this circuit with a 1000 uF Capacitor
------------- John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: madmex
Date Posted: February 27, 2011 at 1:49 PM
Thanks Hotwaterwizard will try that one, seems it would work.
will let you all know!
Posted By: hotwaterwizard
Date Posted: March 03, 2011 at 8:41 PM
You can get a longer delay if you use transistors.
 ------------- John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: madmex
Date Posted: March 04, 2011 at 2:07 PM
Thanks sooooo much hotwaterwizard!!!!
I havent got the time to try them yet, been very busy at work, however you be sure i will do!!!
those parts are cheaper here in mexico! lol
best regards!
-madmex. 
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