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RGB led help? Answered

So i picked up an RGB led at radioshack and when i got home, instead of having 2 pins like normal leds, or 4 like some RGB leds, it had 3 pins, and im not sure what to do. I mixed and matched the  pins with ground and positive wires until it lit up, but it just ran through a cycle of changing colors then stopped and doesnt light up again unless i disconnect the led and connect it again. And as far as i know, the one pin not used in this cycle doesnt do anything. So is this all the led does or is there more? P.S. i wasnt using a potentiometer or anything, just connecting it to power.

Tags:Leds

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astroboy907Best Answer (author)2011-10-08

I have some of these LEDS here. Wire a momentary switch between the 3rd pin (unused) and ground. Pressing the switch will (after the cycle) change colors) they are these type of leds.

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steveastrouk (author)2011-10-08

This is an LED which is ONLY designed to change colour and can't be selected.

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sshuggi (author)2011-10-07

You should look up the datasheet by using the id on the packaging.
Also, you're going to want a current limiting resistor on that, otherwise you'll break the LED. That may be why it auto-shuts off, and you're lucky it has that feature. As far as the three pin thing. It could be that the body is ground. I know that's the case with a lot of integrated circuits, but LED body's are usually plastic. It's hard to really answer without seeing it or the package.

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texpert (author)sshuggi2011-10-08

well yes i was using a resistor also, but i forgot to mention it and how many ohms it was. But if this is the case with the body being ground how do i wire it?

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a117yogi (author)2011-10-08

it might be mislabeled and only have 2 colors, unless its ac but i doubt it

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thegeeke (author)2011-10-08

I've seen those leds with a serial data pin to control the colors... maybe that's what you have. I also agree with sshuggi about the current limiting resistor.

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