changing alarm siren chirp

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=127608
Printed Date: May 14, 2024 at 3:27 AM

Topic: changing alarm siren chirp

Posted By: roger555
Subject: changing alarm siren chirp
Date Posted: June 11, 2011 at 8:41 AM

I was messing around with the siren that came with my 5902 I think its the 514N soft chirp. I opened it up and was cutting the tone jumper wires to get rid of some of the tones I didn't want. While testing it on my bench power supply I found that the stock chirp sound (arm/disarm) is achieved by a very fast momentary 12v pulse to the siren (nothing new here) buut if that pulse is just a few milliseconds longer it sounds completely different and much better in my opinion (I picture someone arming a Ferrari or lambo when I hear it)

Anyone do this before or modify the input signal to give a slightly longer pulse? I couldn't find anything through a search.

Replies:

Posted By: t&t tech
Date Posted: June 11, 2011 at 5:06 PM

I t doesn't matter if no one else did it, if you like the sound it makes go for it,

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COMMIT YOUR WAY TO JEHOVAH AND HE WILL ACT IN YOUR BEHALF. PSALMS 37:5

Posted By: roger555
Date Posted: June 11, 2011 at 7:05 PM

ha I know I was just curious how they did it if they did. I dont have my alarm installed yet so I cant simulate the actual pulse of the alarm quite yet. I was thinking the proper capacitor and resistor across the line might do it.