timed relay

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t&t tech

Platinum - Posts: 2,608

Joined: October 05, 2008

Location: Trinidad and Tobago

Posted: August 17, 2009 at 5:06 PM / IP Logged

I want a light to switch on everytime i start the car and switch off 90 seconds after the car has started. I was going to use a turbo timer triggered by the vehicle's starter wire, but it's kinda costly just to turn on a light, so i was wondering if anyone could help me with accomplishing this in a more cost effective way. Thanks in advance. Cheers.

dualsport

Silver - Posts: 983

Joined: September 27, 2005

Location: United States

Posted: August 18, 2009 at 12:04 AM / IP Logged

Most cost effective way would be if you use a transistor circuit to drive a relay for your light, if you're willing to put it together.

There may be something drawn up previously on here that does that kind of function, it was probably asked before. I'll check and see if someone doesn't find it first.

KPierson

Platinum - Posts: 3,527

This member consistently provides reliable information

Joined: April 14, 2005

Location: Ohio, United States

Posted: August 18, 2009 at 5:15 AM / IP Logged

What's the light for? How much current will it draw? Are you planning to switch the (-) or the (+) side of the light?

Kevin Pierson

t&t tech

Platinum - Posts: 2,608

Joined: October 05, 2008

Location: Trinidad and Tobago

Posted: August 18, 2009 at 5:12 PM / IP Logged

it's just a normal twelve volt led! it'll draw about one amp if so much, it doesn't matter which leg is being switched, whichever's easier. Thanks in advance Guys.

KPierson

Platinum - Posts: 3,527

Joined: April 14, 2005

Location: Ohio, United States

Posted: August 18, 2009 at 9:50 PM / IP Logged

Are you sure it will draw 1A? If it is a normal LED it shouldn't draw over 100mA absolute max.

Either way I could throw together a professional solution for you if you don't mind covering the actual shipping.

Kevin Pierson

t&t tech

Platinum - Posts: 2,608

Joined: October 05, 2008

Location: Trinidad and Tobago

Posted: August 19, 2009 at 4:39 PM / IP Logged

How much would it cost me?

KPierson

Platinum - Posts: 3,527

Joined: April 14, 2005

Location: Ohio, United States

Posted: August 19, 2009 at 7:52 PM / IP Logged

USPS shipping shouldn't be much more then $10 I'm guessing. I've never shipped anything to T&T though!

Kevin Pierson

t&t tech

Platinum - Posts: 2,608

Joined: October 05, 2008

Location: Trinidad and Tobago

Posted: August 23, 2009 at 6:40 AM / IP Logged

Ok! I got a cheap turbo timer for like 100 dollars! Thanks anyway Mr.Pierson!

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timed relay

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