12 volt switched to turn on/off a 16 volt

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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=87144
Printed Date: May 09, 2025 at 10:47 AM

Topic: 12 volt switched to turn on/off a 16 volt

Posted By: lanman31337
Subject: 12 volt switched to turn on/off a 16 volt
Date Posted: December 13, 2006 at 2:45 PM

Would something like this work? I'm going to have a 16 volt battery, and off of the battery i'm going to have a step-down module to drop it to 12 volt. It's for a custom audio application to feed some amps.

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Replies:

Posted By: the12volt
Date Posted: December 13, 2006 at 3:09 PM

The relay will not convert 16V to 12V as shown in your diagram. If you have 16V in, you will get 16V out. If you wish to turn that off and on with a relay and and control it with 12 volts, connect 12V to 86, 85 to ground, 16V to 87, 30 to 16V out.

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Posted By: lanman31337
Date Posted: December 14, 2006 at 2:22 PM

I know it won't convert voltage; I'm getting a step-down module from powermaster in order to do that. There's going to be a 16 volt battery in my engine compartment, and the step-down module will drop what I need down to 14.4, so I can run my radio and the rest of my car electronics from 12 volt, and my 2 sub amps at 16 volt. Since all of the ignition switched devices are going to be on the 12 volt side, I was going to use the 12 volt to turn it on and off with the ignition switch to feed power to my external voltage regulator.

Posted By: hotwaterwizard
Date Posted: December 14, 2006 at 9:25 PM

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

Posted By: hotwaterwizard
Date Posted: December 14, 2006 at 9:30 PM

posted_image

This is a regulator to step down the voltage for the relay.

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !