timed relay
Printed From: the12volt.com
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=115705
Printed Date: June 30, 2025 at 9:12 PM
Topic: timed relay
Posted By: t&t tech
Subject: timed relay
Date Posted: August 17, 2009 at 5:06 PM
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.
Replies:
Posted By: dualsport
Date Posted: August 18, 2009 at 12:04 AM
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.
Posted By: KPierson
Date Posted: August 18, 2009 at 5:15 AM
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
Posted By: t&t tech
Date Posted: August 18, 2009 at 5:12 PM
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.
Posted By: KPierson
Date Posted: August 18, 2009 at 9:50 PM
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
Posted By: t&t tech
Date Posted: August 19, 2009 at 4:39 PM
How much would it cost me?
Posted By: KPierson
Date Posted: August 19, 2009 at 7:52 PM
USPS shipping shouldn't be much more then $10 I'm guessing. I've never shipped anything to T&T though!
-------------
Kevin Pierson
Posted By: t&t tech
Date Posted: August 23, 2009 at 6:40 AM
Ok! I got a cheap turbo timer for like 100 dollars! Thanks anyway Mr.Pierson!
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