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Delayed Pulsed Ground On Pulsed Ground Input Possible?

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=147791
Printed Date: May 02, 2025 at 2:03 AM


Topic: Delayed Pulsed Ground On Pulsed Ground Input Possible?

Posted By: juppers
Subject: Delayed Pulsed Ground On Pulsed Ground Input Possible?
Date Posted: November 06, 2023 at 2:45 PM

I'm attempting to automate up and down on a rear window of a SUV. The alarm can only send a single pulsed ground signal as the trunk release function.
I have a PAC TR-7 in mode #8 that is close to what I need, but I need to generate a delayed second ground pulse to unlatch the outputs after 5 seconds.
Any ideas on a timer IC or circuit design that could accomplish what I'm looking for, or should I just scrap the TR-7 and move on to a microcontroller to handle the logic?


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