How do I reduce 12V to 1V?
Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=39605
Printed Date: May 08, 2025 at 11:58 PM
Topic: How do I reduce 12V to 1V?
Posted By: jman1113
Subject: How do I reduce 12V to 1V?
Date Posted: September 23, 2004 at 9:07 AM
How do I reduce 12V to 1V? I am using a 1volt led and don't want to blow it as its a stock bulb.I could get a 12V led but it would'nt be stock.Thanks in advance,Joe
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hi
Replies:
Posted By: Teken
Date Posted: September 26, 2004 at 8:46 PM
470 - 550 ohm 1/4 watt resistor. Idealy you would have provided a current value for the LED, to be more accurate. But this range will do fine for a general purpose voltage drop.
Regards
EVIL Teken . . .
Posted By: jman1113
Date Posted: September 27, 2004 at 8:40 AM
Thanks for getting back w/me.So I add the 1/4 watt resistor inline on the + side and that will do it . I am retro fitting my 00 vette with passenger side airbag cutoff switch and wanted the stock indicator light and bezel. this will complete it.Thanx again.J
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hi
Posted By: Mongol
Date Posted: October 06, 2004 at 10:32 AM
The LED really doesn't care if you give it 1 volt or 12 volts the thing that will hurt it is the current putting a resistor in line with the LED is what you want to do. Since this will be a series circuit the LED doesn't care if you put the resistor in on the + side or the - side just as long as you've got a resistor somewhere between about 200K ohm and 200 ohm. I'd tell you to use a resistor at or around 1k ohm. Remember the LED only works one direction, you won't hurt it if you hook it up backwards, but it only works one direction.
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