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Looking to create a simple circuit

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=84568
Printed Date: July 15, 2025 at 9:00 PM


Topic: Looking to create a simple circuit

Posted By: SDRandy
Subject: Looking to create a simple circuit
Date Posted: October 24, 2006 at 7:57 PM

Im looking to create a simple circuit to enable a very basic form of passive locking. Has anyone done something similar to this? Obviously, any help, suggestions or comments is appreciated.


Input1 = Doors or interior light
Input2 = Accessory power
Output = Door lock

1. Wait for Input1 == HIGH (Wait for any door to be opened)
2. Wait for Input1 == LOW (Wait for all doors to be close)
3. Wait 30 seconds.
   If during 30 secs, Input1 = HIGH, GOTO 2 (Door is again opened)
   If during 30 secs, Input2 = HIGH, GOTO 1 (Key is turned)
4. Pulse Output (Lock all doors)



Replies:

Posted By: Big Dog
Date Posted: November 01, 2006 at 3:33 PM

Thanks for the challenge!

Here's what I came up with. I didn't have time to build a prototype but if I didn't miss something, it'll do what you ask.

It's built using common parts which should be around five bucks and change.

posted_image



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