3v LED on 12v?

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defaz

Member - Posts: 10

Joined: May 03, 2004

Location: United States

Posted: August 07, 2004 at 10:00 PM / IP Logged

I have a little compass that I would like to make light up when my headlights are on.

I have a little LED that I mounted inside the compass, and it's all ready to go, ecxept it's only a 3v (maybe a little more, but it lights fine at 3v).

What can I run inline to the LED to convert the 12v load I will be giving it down to about 3v?

My experiments so far have cost be a handful of blown LEDs. 3v LED on 12v? -- posted image.

Thanks for any help...

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xetmes

Silver - Posts: 586

Joined: May 18, 2003

Posted: August 07, 2004 at 10:11 PM / IP Logged

lol you just need a resistor, depends on the current draw. 470 ohm will probably be fine...

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defaz

Member - Posts: 10

Joined: May 03, 2004

Location: United States

Posted: August 08, 2004 at 3:07 AM / IP Logged

Thanks for the help.. I may not be too good with voltage/amperage conversions and all that, but I can make a mean bowl of chili...

eeh no I cant really do that either.

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lilboi

Copper - Posts: 126

Joined: May 01, 2004

Location: United States

Posted: August 08, 2004 at 3:45 AM / IP Logged

Yea 470 will assure that it won't blow. If you want it brighter you can drop down to probably 350, but don't go much lower then that.

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defaz

Member - Posts: 10

Joined: May 03, 2004

Location: United States

Posted: August 08, 2004 at 8:24 PM / IP Logged

Thanks for the help... Got it all wired up today and now I'm rollin custom style with a lighted compass.

BLING BLING!! Now all I need is a chain steering wheel and a jesus sticker and I'M SET!

(maybe some wavy velour seat covers.....mmmmmmm)

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3v LED on 12v?

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