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Need help locating a specific diode

I

iconicj

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Dec 16, 2011
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First, I must point out I'm doing this from a smartphone, and thats mainly
why I'm needing help. Its turning out to be a pain in the ass.

I posted on an S3 Arctic red laser conversion a month or so ago, but I
ended up blowing the diode due to an obvious error - I assumed the S3 Arctic
host was case ground. Its not.

So, I'm trying to locate a suitable diode. The driver in the Arctic has been
adjusted down to 530ma, and I'm just going to use a few diodes in series to
lower the voltage.

So here's the criteria :

1. Case neutral - photodiode not nessecary (and this is the one I'm having problems with. Its not easy to go through long lists on a smartphone...)
2. 620-660nm range
3. Max current exceeding the 530ma of current this driver can adjust down too.
4. Highest output possible, >200mw obviously preferred.

Anybody know off the top of their head a part number/location for a part that
matches these criteria?
 





I don't have any experience with the S3, but is there a way to isolate the diode's housing from the case? Or is it a direct press heatsink inside?

To my knowledge there is no case neutral diode. But maybe you could put your own driver in the host and be able to use it with a case negative set-up.
 
Its a direct press fit TO-18 case. There are many diodes which are case neutral - its pretty common, actually, but hard to find on the aforementioned phone.
 
iconicj said:
Its a direct press fit TO-18 case. There are many diodes which are case neutral - its pretty common, actually, but hard to find on the aforementioned phone.
Click to expand...

as far as I know the high power 650nm diodes are case neutral. Unless you want a high power 635 diode. Those have horrible divergence though and are expensive

*EDIT* woops, I meant case negative. Thanks for catching my contradiction iconic
 
Last edited:
The 650s are fine, then. The only thing is I need one that wont blow with the current levels above.
 
You just told me the 650s are case neutral. Then you said they are not. Which is it?
I dont really care if its 635, 650, 660... has to be neutral, though.
 
iconicj said:
You just told me the 650s are case neutral. Then you said they are not. Which is it?
I dont really care if its 635, 650, 660... has to be neutral, though.
Click to expand...

Oh crap! Sorry about that, It's late where I am and I just finished a huge paper. :tired:

650nm IS case negative...
635nm is NEUTRAL
 
Last edited:
Thats ok, im drunk too :-)

Can you give me a link to a 635 part that I can read about it?
 
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