Timer for short trigger pulse?

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=75040
Printed Date: May 05, 2025 at 12:38 PM

Topic: Timer for short trigger pulse?

Posted By: advancedautotek
Subject: Timer for short trigger pulse?
Date Posted: March 24, 2006 at 5:34 PM

I am Installing a Rattler model 300 into a Mercedes Benz 190 with vacuum locks I wired in the 2 relays as the diagram shows however, my neg pulse from the alrm is to short, only about 1/2 a second long, I need at least a 2 second pulse, Do you know of a timer/relay that I could use to turn a 1/2 second pulse, into a 2 sec plus trigger?

Any help would be greatly appreciated, thx in advance.

Michael

Replies:

Posted By: forbidden
Date Posted: March 24, 2006 at 6:34 PM

Have a look at the PAC TR7, it may be able to do what you need.

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Top Secret, I can tell you but then my wife will kill me.

Posted By: xscash
Date Posted: March 24, 2006 at 7:33 PM

im not familia with the ratteler , but some r/s have an option of lock out put ....short , long and double unloick...check for that.

Posted By: doibuy
Date Posted: March 24, 2006 at 8:11 PM

You can use a pulse timer. DEI makes one, I think it is a 528t. It has a set screw that you can turn to adjust the output time of the pulse.

Posted By: doibuy
Date Posted: March 24, 2006 at 8:17 PM

I just tried to pull up the owner's manual for your alarm, but it wouldn't, so I checked the Viper 300, which is very similiar, and there is an adjustment in the programming to change from 0.8 second pulse to 3.5 second pulse, if your alarm has this, it will be much easier, just a couple pushes of the valet swich.

Posted By: dualsport
Date Posted: March 24, 2006 at 8:54 PM

If it turns out it isn't programmable and the commercial options don't work out, you can roll your own, so to speak.
Depends on how much you're willing to tinker-

Posted By: dualsport
Date Posted: March 24, 2006 at 9:08 PM

If you want to play:

posted_image

Posted By: bdl666
Date Posted: March 24, 2006 at 9:36 PM

You can increase the pulse to 3.5sec on that unit, it's feature #5 .

Posted By: advancedautotek
Date Posted: March 25, 2006 at 10:24 AM

bdl666 wrote:

You can increase the pulse to 3.5sec on that unit, it's feature #5 .

Any chance you can tell me more about feature #5? The customer I am installing this alarm for has lost the manual so I am flying blind on this one, why it had to be a freaking mercedes is beyond me. Pulling my hair out on this one.

Thx

Posted By: bdl666
Date Posted: March 25, 2006 at 4:47 PM

I just uploaded the manual to the downloads section of this site.

Posted By: advancedautotek
Date Posted: March 27, 2006 at 11:26 AM

Perfect!!! Thx!! Exactly what I needed, I finished the install and customer happy Thx again guys for all your help.

Mike