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faux alarm led wiring


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jlazurca 
Member - Posts: 10
Member spacespace
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.

reax222 
Copper - Posts: 220
Copper spacespace
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.
reax222 
Copper - Posts: 220
Copper spacespace
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.
i am an idiot 
Platinum - Posts: 13,693
Platinum spaceThis member consistently provides reliable informationspace
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.

jlazurca 
Member - Posts: 10
Member spacespace
Joined: May 13, 2008
Location: Saskatchewan, Canada
Posted: November 10, 2008 at 12:16 PM / IP Logged  

Thanks you


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