mith light setup/relay

Printed From: the12volt.com
Forum Name: Lights, Neon, LEDs, HIDs
Forum Discription: Under Car Lighting, Strobe Lights, Fog Lights, Headlights, HIDs, DRL, Tail Lights, Brake Lights, Dashboard Lights, WigWag, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=101906
Printed Date: May 11, 2024 at 6:01 AM

Topic: mith light setup/relay

Posted By: hitmanvic
Subject: mith light setup/relay
Date Posted: February 05, 2008 at 3:01 PM

I want to put three new lights in my car. but i want them to work apart. Like when i switch one light on the other two will turn off when i switch on a second one the one that was on will turn off,, I have three 12 volt relays will that be enough or do i need more. I know it sounds complicated but I'm no good with these relays. Thank you

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One extreme gamer

Replies:

Posted By: KPierson
Date Posted: February 05, 2008 at 4:26 PM

What are you going to be using to turn the lights on? Push buttons? Toggles?

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Kevin Pierson

Posted By: hitmanvic
Date Posted: February 05, 2008 at 4:47 PM

i have both types of of switches i have a couple oh pusg button and rocker switches but I don't know which one to use

thnx

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One extreme gamer

Posted By: KPierson
Date Posted: February 05, 2008 at 5:16 PM

Try this out:

posted_image

I just drew this up. It should work, but I obviously didn't test it. I got lazy on the layout (I only have access to MSpaint here so I had to cut some corners). Relay xB and relay xC are both used for their normally closed contacts to break the latch created by the active relay.

Basically, once you turn a light on the Relay xA latches and continues to power the light (and the relay). If either of the other two buttons are pushed its associated light and relays will energize, thus breaking the latch of the first light.

Negative sides that I see are:

1. Can't be used unless the vehicle is running (or a constant power source is added, this many relays will kill a battery pretty quick).

2. Can't turn all the lights off. Once one light is on at least one light will remain on. You could add a normlly closed "off" pushbutton pretty easily, but that isn't shown.

If you get away from relays and in to some 'smart' electronic controls you'll be able to greatly simplify the design. You could possibly switch to some logic gates to simply the entire thing.

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Kevin Pierson