Polarity on this "made in korea" LED?

[manne]

Hi,

does anybody know the correct polarity for the following type of LED?

http://www.kaidomain.com/UploadFiles/633594719836277500.JPG

http://www.kaidomain.com/UploadFiles/633594719838621250.JPG

There's a dot on the bottom side, seems the only mark to discern the leads.

 

[mds82]

No, but i found a very simple way to test it. I have a Volt meter, and it i set it to Continuity, it puts out a Very small voltage, just enough to make the LED die glow a bit. I've used this countless times to check the polarity of LED's

 

[manne]

Thanks mds82.
While you wrote that answer, i've already made exactly the same experience.

And sadly also the experience that kaidomains "RED 620-625nm LED" is orange!

 

[csshih]

Instead of a multimeter, I use a cr2032 coin cell.

 

[pepko]

yes, multimeter is good way to test polarity ...