What do i need

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=12935
Printed Date: May 16, 2024 at 2:57 PM

Topic: What do i need

Posted By: SI_ikk
Subject: What do i need
Date Posted: April 29, 2003 at 3:41 PM

and where do i get it, i need a relay that when something turns on, something else will turn off. I have only been able to find ones that turn things on, when other things turn on. Any help would be appreciated. Thank you

Replies:

Posted By: TomEllis
Date Posted: April 30, 2003 at 1:24 PM

Let me see if I understand what you are asking.
You want to turn off the light when the relay is activated?
If this is the case, then you need a single pole double throw relay, connect the wires to the normally closed contacts.
In this configuration, the light will be on until the relay is turned on, then the light will go off.

Is this what you are looking for?
Tom
posted_image

Posted By: Thinkster
Date Posted: April 30, 2003 at 10:07 PM

But if you want to use one relay and control two independent things, then you need a DPDT relay. So item 1 would be hooked up to 1/2 relay on the COM.,NC pins and item 2 would be hooked up to the other 1/2 of the relay on the COM., NO pins. When relay is not energized, item 1 will be ON. When relay is energized, item 1 will go OFF and Item 2 will go ON.
Is this what your looking for?

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