need to take 4.5 volts to 12 volts

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neonx18

Member - Posts: 8

Joined: April 28, 2006

Location: Texas, United States

Posted: May 10, 2008 at 1:37 PM / IP Logged

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

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bbullers

Copper - Posts: 76

Joined: April 16, 2008

Location: Illinois, United States

Posted: May 10, 2008 at 8:38 PM / IP Logged

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

The Only Stupid Question, is the one Un-asked

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KPierson

Platinum - Posts: 3,527

This member consistently provides reliable information

Joined: April 14, 2005

Location: Ohio, United States

Posted: May 10, 2008 at 9:06 PM / IP Logged

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!

Kevin Pierson

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need to take 4.5 volts to 12 volts

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