trigger 12V relay with 6V?

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=143421
Printed Date: May 11, 2025 at 10:56 PM

Topic: trigger 12V relay with 6V?

Posted By: Lubrano
Subject: trigger 12V relay with 6V?
Date Posted: July 31, 2017 at 9:25 PM

Working on a project for an older 6 volt vehicle. Is there a way to trigger the coil of 12 volt automobile relays with 6 volts?

Replies:

Posted By: Ween
Date Posted: August 01, 2017 at 6:47 PM

What are you trying to turn on with the relay? A small dc/dc converter adjusted to 12 volts or so out. Output side connected to the relay coil. Input would be controlled by a switch? More info would help.

Posted By: i am an idiot
Date Posted: August 05, 2017 at 7:22 PM

You can easily use a resistor and a 5 volt relay. Find a 5 volt relay that will suit your needs and measure the resistance of the coil, let me know that reading. Also get me an actual voltage reading that will be triggering the relay.

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