Help - What diodes do I have?

[luccax]

I've bought this 2 diodes more then a year ago. I just can't remember what diodes are this, i suspect they are mitsubishi ones but i'm not sure.

Can you recognize them?
https://picasaweb.google.com/102684791688163338557/October272012?authuser=0&feat=directlink

I'm thinking about using this driver:
AMC7135 1050mA Regulated Circuit Board for DIY Flashlights 10-Pack - Free Shipping - DealExtreme

I'll pull some amc7135 off (one or two) depending on wich diode I have.

 

[Blord]

I can't see much on the photo. How much did you pay for the diode ?
$10 ---> LPC-826 red 660nm diode
$50-80 ---> Mitsubishi 638nm diode.

 

[ApexProxy]

Blord beat me to it.

If you power it up to about 400mA and it puts out a nice small round dot its an LPC and if its a Mitsu it will have an ugly line lol. If you are able to count the number of microscopic bond wires on the diode that could tell you what it is.
-LPC-826 has one bond wire on each side
-500mW Mitsubishi has 2 bond wires on each side

Here is an example of what bond wires look like on a different diode but bond wires all look fairly similar. The bond wires are the tiny gold filaments in the middle of the diode running the the rectangular piece between the two posts.

 

[luccax]

Thank you both very much! I'll try to run it tomorrow!

 

[IsaacT]

Is it safe to run the LPC-826 diodes at 400mA??? What power would that result in??

 

[ApexProxy]

An LPC-826 at 400mA would output about 250mW. They are known to run at up to 500mA at max if you are daring but 400mA is a very stable current for them.

EDIT:
I just snapped a couple pictures of the bond wires on an LPC-826 diode for another reason but one of them could be useful on this thread.

Epic phone macro shot is epic.

 

[sinner]

Very nice shot there :beer: aixiz acrylic lens i guess?!

 

[ApexProxy]

That one was a 445nm 3-Element lens backwards.

 

[luccax]

There is valuable info on this thread!

I'm pretty sure it's a LPC because of the value I payed. Today i'll pull off two of the am7135 to make my driver output 350mA and i'll test it.

Apex, why do you use a 445nm 3-element lens backwards for this diode?!

 

[AUS]

Apex, why do you use a 445nm 3-element lens backwards for this diode?!

He means he used the laser diode lens in front of a camera to take the close up shot of the diode. They work well as macro lenses, especially on a camera-phone.

 

[luccax]

Wow, that's awesome, gonna try it right now

 

[ApexProxy]

You have to get extremely close to the object you want to photograph usually btw.