can u make a 2 wire led as brite as a 3

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metal_mulisha

Member - Posts: 27

Joined: June 23, 2008

Location: Ontario, Canada

Posted: September 01, 2008 at 7:33 PM / IP Logged

Is it possible to make a 2 Wire Led Light as Bright as a 3 wire? I picked up a set of led strips im using for turn signals, and they are 3 wire. The white wire is normal I guess and the red wire is like 2 or 3x brighter. I also picked up a set of 2" LED Marker lights, but they are only 2 wire, and are just as bright as my led strips in the normal state... I want to know if I can either turn it into a 3 wire, or some how atleast make it just as bright as a 3 wire led...

Anybody have any ideas? And I would just go buy a 3 wire light, but I couldnt find any.

Thanks.

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megaman

Copper - Posts: 385

Joined: June 24, 2008

Location: Montana, United States

Posted: September 02, 2008 at 9:18 AM / IP Logged

The two diiferent wires have two different resistances to control the current. Higher resistance, less current, less bright. Lower resistance, Higher current, brighter LED's.

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metal_mulisha

Member - Posts: 27

Joined: June 23, 2008

Location: Ontario, Canada

Posted: September 04, 2008 at 12:40 PM / IP Logged

Okayyyy, so how do I turn a simple LED with 1 positive & 1 Negative, into 2 positives ( High & Low Resistance ) and a ground wire? Each Light has 9 individual LEDS inside of em.

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reax222

Copper - Posts: 220

Joined: March 11, 2006

Location: United States

Posted: September 04, 2008 at 2:04 PM / IP Logged

As far as I know, LEDs operate in a narrow voltage range. Meaning if the circuit is to receive 12v, it will either have to divide the voltage across all the LEDs or it must reduce the voltage before it gets to the LEDs. I would guess the 9 LEDs are in series and each LED sees only 1.33v. If you reduce the voltage to 10v, each LED will see 1.11v. If they would still light would be the question.

I don't know enough about voltage dividing yet to say for sure, but I would think you would have to put in a resistor inline. I might experiment with a pot before trying resistors, or you can get the resistance of the lamp and figure it out with ohms law.

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megaman

Copper - Posts: 385

Joined: June 24, 2008

Location: Montana, United States

Posted: September 04, 2008 at 2:48 PM / IP Logged

The LED's would not be in series. If one went out, they would all go out. In a parrallel configuration, you can use different resistances to get different brightness levels.

As far as the circuit goes, there's many ways to skin a cat.

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metal_mulisha

Member - Posts: 27

Joined: June 23, 2008

Location: Ontario, Canada

Posted: September 07, 2008 at 1:54 AM / IP Logged

Sounds too confusing for me. Hahaha,, think I might ust live with the 2 wire, lol thanks tho.

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can u make a 2 wire led as brite as a 3

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