LEDs with Resistors

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customcutlass92

Member - Posts: 26

Joined: July 11, 2005

Location: United States

Posted: July 28, 2005 at 8:37 PM / IP Logged

I know that LEDs need resistors to work properly with a 12v source, but the LEDs that I bought each came with their own resistor for me to solder on. I want to wire about 20 LEDs in series so I can just ground it on the other side. Does each LED still need its own resistor???

Thanks in Advance,

Brad

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nowlater123

Copper - Posts: 61

Joined: June 24, 2005

Location: United States

Posted: July 28, 2005 at 10:34 PM / IP Logged

Try wiring all the LEDs in parallel. This site should be helpful.

http://www.metku.net/index.html?sect=view&n=1&path=mods/ledcalc/index_eng

Just use the parallel calculator at the bottom.

Kenwood all the Way!

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customcarchris

Copper - Posts: 95

Joined: July 08, 2004

Location: United States

Posted: July 28, 2005 at 11:43 PM / IP Logged

Yes, each LED needs its own resistor. You will have to run a power wire and a ground wire to each LED.

It's not that much harder, just run both wires and then solder the resitor to the power and positive of the LED and then the negative of the LED to the ground and then at the end just stop the power and "ground" the ground wire.

The most LEDs you can run in parallel is six with red, yellow, and orange, or three with blue green and white. Purple and pink or multi colors I'm not sure, but I know you can't run more than those numbers in one parallel strand, and then you would need a different resistor than what came with the LEDs for the parallels.

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LEDs with Resistors

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