need to take 4.5 volts to 12 volts

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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=104624
Printed Date: June 15, 2024 at 8:00 AM

Topic: need to take 4.5 volts to 12 volts

Posted By: neonx18
Subject: need to take 4.5 volts to 12 volts
Date Posted: May 10, 2008 at 1:37 PM

I have a car that has 4.5 vlt amp turn on and 12vlt amp pwr I need a 12vlt amp turn on for my fm modulator but I cant figure out hoe to wire up my relay

thanks for you help

Replies:

Posted By: bbullers
Date Posted: May 10, 2008 at 8:38 PM

I would just find a wire in the fuse panel that is,"hot with ignition on" and wire your remote wire to safe side of that.......... Make sure you install a slightly larger fuse! Thats the easiest way to do it... no relays, no mess. Keep it simple

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The Only Stupid Question, is the one Un-asked

Posted By: KPierson
Date Posted: May 10, 2008 at 9:06 PM

You could use a 5vdc reed relay.

You could also use an NPN transistor to drive a PNP transistor.

You could also use an NPN transistor to drive a standard relay.

You have quite a few options, I personally would just find a 5vdc reed relay and be done with it!

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Kevin Pierson

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