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LED Question, not the typical one... #171085 May 3, 7:42pm May 3, 7:42pm
Joined: Sep 2003
Posts: 3,077
Saint Louis, MO
slidr OP
Specialist
2000 Toyota Celica
slidr OP
Specialist
2000 Toyota Celica

Joined: Sep 2003
Posts: 3,077
Saint Louis, MO
LED Question, not the typical one...
I've got my LED's done in my instrument panel, and I already have some of a different nature in my AC console, to light it up a somewhat dim shade of blue.

I was looking at Radio Shack, and they have a bunch of LED's that aren't surface mount, but rather a big bulb with two prongs sticking out of the end of it. I know those two prongs have to be attached to wires, so here's where the question comes in...

Do I just solder on two wires, and one goes to ground, while the other goes to the power source? If so, then that will be easy enough. Just wondering if there is a difference in polarity between the two prongs, and one prong HAS to be grounded, while the other HAS to go to the power source.

Does it matter?


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Re: LED Question, not the typical one... [Re: slidr] #171086 May 3, 8:08pm May 3, 8:08pm
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Saint Louis, MO
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2000 Toyota Celica
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Oh fuck, and what about the resistor that has to be added???


Aqua Teen Hunger Force...number one in the hood, G
Re: LED Question, not the typical one... [Re: slidr] #171087 May 3, 8:33pm May 3, 8:33pm
Joined: Jul 2003
Posts: 254
Raleigh & Charlotte, NC
MxReb0
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2000 Toyota Celica
MxReb0
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2000 Toyota Celica

Joined: Jul 2003
Posts: 254
Raleigh & Charlotte, NC
As with any diode, LEDs are polarized. The longer lead is the anode (+). The anode must go to the current source, and the cathode to the drain (lower reference voltage, like ground). You'll need to calculate how much current you want to put through the LEDs (a few milliamps) and calculate your resistance for a voltage divider or current splitter.

1869971497-LED.jpg

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Re: LED Question, not the typical one... [Re: MxReb0] #171088 May 3, 10:04pm May 3, 10:04pm
Joined: Sep 2003
Posts: 3,077
Saint Louis, MO
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2000 Toyota Celica
slidr OP
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2000 Toyota Celica

Joined: Sep 2003
Posts: 3,077
Saint Louis, MO
Originally Posted by MxReb0
As with any diode, LEDs are polarized. The longer lead is the anode (+). The anode must go to the current source, and the cathode to the drain (lower reference voltage, like ground). You'll need to calculate how much current you want to put through the LEDs (a few milliamps) and calculate your resistance for a voltage divider or current splitter.
Ummm, ok. So the long lead is positive, while the short one gets the ground. Does the resistor get soldered onto the long lead?

What size of a resistor will I need.



BTW, thanks for the info. I'm just a little illiterate when it comes to electrical lingo.


Aqua Teen Hunger Force...number one in the hood, G
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