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How to wire this LED Chip? Answered

Picture of

The + and - markers (top and bottom on the picture) are positioned orthoginal to the terminals (left or right). Or am I suppose to connect th wire to the bit of metal beside the + and - signs. 

Tags:LED

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CraigN16 (author)2016-09-04

This is one of those hair-pulling things that everyone manages to leave out, yet is crucial to getting it to work. Chances are the entire LED Chip is coated in a clear non-conductive waterproof film, it is standard now. If you were soldering it with flux, that would remove it where you were making the connection. Take some steel wool, or small screwdriver, and scrape off the contact before attaching the wire or multimeter, you may even have to push down hard on the wire, this stuff can be a pain to remove without flux/solder.

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atlantageek (author)2015-11-05

I do have a power supply that came with the LED Of course its just raw wires ready to be soldered

I tried testing with the diode test on my Multimeter. Unfortunately I think there is too much resistance or its dead and no voltage flows either way.

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rickharris (author)atlantageek2015-11-05

this may help

Check the resistance - Low one way high the other.

The LED array will be many small LEDs in parallel - Series so it would be unusual for them all to be dead.

Try the power supply output Pos to the + pad and negative to the - pad

If no light check the voltage from the Power supply.

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Wired_Mist (author)rickharris2015-11-06

Yeah that sounds like a power supply problem,

Either way be sure to use a massive heat sink and a fan to cool it off. At Minimum you will need a Cpu cooler from a old computer and some Thermal-greese

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iceng (author)atlantageek2015-11-05

FYI... Voltage is only the pressure that makes amperes of current flow.

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rickharris (author)2015-11-05

You WILL need a constant current source to run this LED at anything near its full power.

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Downunder35m (author)2015-11-05

It is easier than you might think.
The pads inside the plastic are the direct connections to the LED stacks - so where it says positive it is positive.
But they are not ment for soldering!
Use a multimeter to check which pad goes to which soldering pad - the square thingies with the hole in it.
From memory:
If you have the + and - negative signs orientated like in your pic,
then negative would be on the left, positive on the right.
But please confirm with your multimeter ;)

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Jack A Lopez (author)2015-11-04

I am guessing this device has two terminals, and they are those metal bars on the left and right there, as seen in your picture. I don't know about polarity, but I'm not worried because it's an LED, and the D stands for diode.

So I would try pushing a few milliamperes through it, e.g using a voltage source in series with a resistor, trying both directions, and naively expecting one current direction, but not the other, to cause the device emit light.

Too bad it did not come with a data sheet. Maybe documentation exists for it, somewhere.

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