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Constant 12 V output

Printed From: the12volt.com
Forum Name: Mobile Video, GPS, and Navigation
Forum Discription: Mobile Video Head Units, DVD Players, LCD and TFT Monitors, Navigation, GPS, PS2, PS3, XBox, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=38000
Printed Date: May 20, 2024 at 10:31 PM


Topic: Constant 12 V output

Posted By: Tengoku
Subject: Constant 12 V output
Date Posted: August 24, 2004 at 12:36 AM

When I power my monitor in the car it begins to interfere when I turn on the car... I figure its because of the alternator feeding power to the battery.... I stuck another car battery in my car and I connected the monitor to it alone and it was clear while I had the car on...

so i figure I need a constant 12V going to the monitor without anything interfereing with it... how do I do this?

is there some sort of relay what will filter out any other signals and give me a solid constant voltage?



Replies:

Posted By: Velocity Motors
Date Posted: August 24, 2004 at 1:59 AM

All you need to do is use a relay that will get triggered by the ignition to get s reliable power from the battery. Use a relay wired like this:

  • 87 : Fused connection straight to battery
  • 30 : To the monitor constant power wire
  • 85 : GROUND
  • 86 : To switched IGNITION from car.
  • 87a: NOT USED


-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA


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