Fire Station, Speaker Output To Trigger Relay?

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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=142408
Printed Date: May 06, 2024 at 5:39 AM

Topic: Fire Station, Speaker Output To Trigger Relay?

Posted By: chadmjrs
Subject: Fire Station, Speaker Output To Trigger Relay?
Date Posted: January 11, 2017 at 2:52 PM

I am trying to engineer something for a local volunteer fire station. they are wanting a few very small overhead 12v led lights to come on for a few minutes when there alerting system goes off. all they have now is a motorola radio system with a positive/negative speaker wires coming out of the back. is there a way to use the positive speaker wire to activate a relay which is on a small timer, that will turn some small lights on for about 3 minutes before they automatically turn off?

Replies:

Posted By: i am an idiot
Date Posted: January 11, 2017 at 7:53 PM

https://www.circuitdiagram.org/audio-activated-relay-switch.html

You can use the above along with a DEI timer module. I do not know the part number but I am sure somebody here can help with that.

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