Problems with diode, What i did wrong?

[BShanahan14rulz]

small voltage rise = large current increase with these types of devices. This is why CC is recommended.

 

[qumefox]

What did you do to LED a 1W casio diode? ESD? :thinking:

I've seen these take 2A+ and still live.

But this behavior is normal for these diodes. I thought it was abnormal because I thought you were talking about a 660nm diode.

Compare yours with the measurements I took off one of mine in this thread. You'll probably find the the voltage and current numbers for yours are fairly close to mine if it's electrically intact.

http://laserpointerforums.com/f65/yet-another-445nm-labby-55317.html#post780174

 

[eyeballpaul]

Does this means voltage rise = resistance drop?

 

[qumefox]

You have it backwards. It's still a diode in the circuit. As voltage increases, it's resistance increases. That's why the voltages don't really change that much compared to changes in current.