burning leds
Printed From: the12volt.com
Forum Name: Lights, Neon, LEDs, HIDs
Forum Discription: Under Car Lighting, Strobe Lights, Fog Lights, Headlights, HIDs, DRL, Tail Lights, Brake Lights, Dashboard Lights, WigWag, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=67274
Printed Date: May 10, 2025 at 11:08 AM
Topic: burning leds
Posted By: enticer
Subject: burning leds
Date Posted: November 29, 2005 at 5:42 PM
Hi i am trying to add a led on the heated glass of my snowmobile helmet.This way i will be able to see if the glass is heating,well i burned 3 led's while trying.I know cause they lighted a few sec..
it was 12 volt leds tho and i am now wondering if i should add a resistor,but i have no idea what resistor to add.
Anyone can help? thanks.
Replies:
Posted By: menace2sobriety
Date Posted: December 04, 2005 at 3:08 AM
what color led are u using?
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Posted By: fingaz22
Date Posted: December 04, 2005 at 10:57 AM
a 50 ohm resistor will cut voltage by one volt. if you are using just one led and have a 12 volt source, then you will need to bring the voltage down to the leds operating voltage witch is 5 volts. so adjust accordingly you may have to get two resistor to get the correct value.
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JUST ONE MORE AMP!!!
hu,alpine cva 1005/dva 5205
sound processor,symmetry(first one).
sub amp,power 1000 the terminator.(1992).
subs,spl comp dual 1 ohms.
punch 150hd on a 10" ev.
alotofhighs
Posted By: enticer
Date Posted: December 05, 2005 at 9:23 AM
menace2sobriety wrote:
what color led are u using?
I tried red,green and yellow.
Posted By: candy&chrome
Date Posted: December 05, 2005 at 3:53 PM
hi there, i found that you're going to want to use a 110 ohm resistor on the positive(+) side of your l.e.d., you can put 12 volts on it all day everyday and all the resistor will do is get a little warm, i use that method for most interior lighting projects i do. i would have to assume you are using 3volt l.e.d's, and putting 12 volts to them will obviously burn them out, so adding the resistor will do the trick. hope i could help. ------------- canada's cold eh.
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