faux alarm led wiring

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jlazurca

Member - Posts: 10

Joined: May 13, 2008

Location: Saskatchewan, Canada

Posted: November 09, 2008 at 8:33 PM / IP Logged

Good Day all,

I am looking to install a blinking LED in a car and would like it to only work when the car is off. this asks the question how to power the unit. I found one idea on the net to use a 12v switched as a ground for the led and a live for the pos. the article says when the car is off and the switched no longer has any juice it will act as the ground for the LED.

Does this sound right?

Thank you everyone.

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reax222

Copper - Posts: 220

Joined: March 11, 2006

Location: United States

Posted: November 09, 2008 at 10:22 PM / IP Logged

It will change states, but I'd be very careful in which system your tying into. Anything computer controlled might not like being a ground for even as little a load as an LED. Perhaps using the power point/ cigarette lighter would work.

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reax222

Copper - Posts: 220

Joined: March 11, 2006

Location: United States

Posted: November 09, 2008 at 10:55 PM / IP Logged

I don't understand what's going on, but look at this link http://www.varad.com/v4/pdf/IM-SCANNERSIgnition.pdf from varad.

http://www.varad.com/v4/pdf/IM-SCANNERSEL.pdf

These are three wire, constant, switched and ground.

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i am an idiot

Platinum - Posts: 13,670

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: November 10, 2008 at 9:24 AM / IP Logged

jlazurca wrote:

Does this sound right?

Yes, this does work, and it works well.

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jlazurca

Member - Posts: 10

Joined: May 13, 2008

Location: Saskatchewan, Canada

Posted: November 10, 2008 at 12:16 PM / IP Logged

Thanks you

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faux alarm led wiring

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