Latching Relay Circuit With One Momentary Switch

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=142496
Printed Date: April 29, 2024 at 8:31 AM

Topic: Latching Relay Circuit With One Momentary Switch

Posted By: davidhaller
Subject: Latching Relay Circuit With One Momentary Switch
Date Posted: January 26, 2017 at 2:46 PM

Hello, I have a keyless entry system on my car and it honks every time I lock the doors. I would like to use a latching relay to enable and disable it to honk. I want to use a momentary switch for this. How can I do this?

Replies:

Posted By: the12volt
Date Posted: January 26, 2017 at 3:39 PM

You may be better off just using a hidden toggle switch so you do not run down your battery, but you can have a look at the latching relay diagrams here: https://www.the12volt.com/relays/relaydiagrams.asp

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Posted By: davidhaller
Date Posted: January 26, 2017 at 4:23 PM

I want to use a momentary switch because it is slim line.

Posted By: the12volt
Date Posted: January 26, 2017 at 5:45 PM

Instead of using multiple relays to create a latch, I'd find a latching relay like the one seen here: https://www.the12volt.com/relays/page5.asp#sppbdl

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Posted By: davidhaller
Date Posted: January 27, 2017 at 10:08 AM

Is there a way to do this but with one relay?

Posted By: the12volt
Date Posted: January 27, 2017 at 10:57 AM

Yes, use a latching relay. Each time you activate the coil of a latching relay, it will change the contacts from closed to open if the contacts were closed, and from open to closed if the contacts were open.

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