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12x BR DIODES

Traveller

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Nice to see you again, Milos.
Ditto :beer: / Long time no see, where (or better yet, why) have you been hiding?
 



Milos

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Had son, been busy with family. No space at home for my shop in small apartment, so i have like 2 hours a week at work where i started "catching up" a bit with new diodes.

I decided to build max power pen hosts i can to warm up :)

then I'll machine some parts for Stingray 3 platform for Flex Mod P3 driver and any diode that comes along up to 4A of current.

cheers:lasergun:
 

DTR

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I installed G-1 lens and I'm getting nice 930mW with fresh batteries drawing 604mA.
That's awesome. Only 70mW away from 1W. How much runtime do you have on it at the moment? I am still waiting on some microboosts that I am planning on using with my S06J. I think I will go with 650-700mA and see if I can get it to 1W.:eg:
 

LarryDFW

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The real question is . . .

which diode is tougher for under $70 ?

The BHR-205 sled.

The S06J sled (LG10X; I have taken to 900 mw)

The Sony SLD-3237 diode (rated @ 400mw).

The LG 12X Blu-ray writer WH12LS30 I saw today at Fry's for $89.

LarryDFW

P.S. Now Fry's has an HP 12X Blu-ray writer for $89 (w/rebate)
 
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DTR

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Hey Milos any updates on your runtime so far @ 600mA. I am ready to build another and am trying to decide on what current to try out. I think if you have had good success I will go with 650mA and see if it survives there.:beer:
 

Exerd

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I have two sleds here I forgot I had. One is the S06j, the other is the SF-BW512p.

Are these supposedly the same diode in each?

About driving the 12x diodes to high currents. I am going to push them now that they are cheap. But, I can say that through testing, their lives are greatly shortened at current past 600mA, and 650-700mA may get ugly.
 

DTR

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I have two sleds here I forgot I had. One is the S06j, the other is the SF-BW512p.

Are these supposedly the same diode in each?

About driving the 12x diodes to high currents. I am going to push them now that they are cheap. But, I can say that through testing, their lives are greatly shortened at current past 600mA, and 650-700mA may get ugly.

From what I have seen in my testing between the two the SO6J seems better than the SF diode. Currently we are trying to determine how much better.:)
 

Milos

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bad news

Last night was not a good night, I had very little time and no power meter with me. In any case, i got Flex V3 drive to 400mA at 4V from my PS. Optical output was less than impressive. I upped current to 550mA and saw only minimum increase in brightness ?? Then i upped it to max ~700mA and no visible optical output increase at all??!!. Also V3 wouldn't go over 500mA with 4V input (unlike V5), so i had toup voltage on my PS to about 5.5. Current reading reached maximum of 723mA at diode, and like i said optical output appeared to be the same, looking about like my 300mW. (slightly out of focus dot)

Diode died after about 3 min or less total at this current. I did see smoke come out of my V3 driver before the test as i accidentally reversed polarity at the input of the driver. It happened to me before couple of years ago, without any damage. This time i'm not even sure what happened as i had to run home.

sorry for dissapointment. I have to get V5 driver and new sled, and will repeat test, this time measuring Optical output as i increase current. If i had it with me yesterday, i would have been able to understand better what was going on before diode burned out (or both driver and diode died, i still need to check both) Next week.

ahhhhh,
 
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DTR

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Damn man. Sorry for your loss.:cryyy:
 

Milos

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hey DTR, you have plenty of recent experience. I'm thinking to get Microboost driver for this test. trying to feed up to 900mA to S06J from single 3.7 Li-ion.

Would this be better choice than MicroFlex V5. I might get ready for next thursday round 2 attempt.
 

DTR

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hey DTR, you have plenty of recent experience. I'm thinking to get Microboost driver for this test. trying to feed up to 900mA to S06J from single 3.7 Li-ion.

Would this be better choice than MicroFlex V5. I might get ready for next thursday round 2 attempt.
I have used the Flexdrives with no problem running bluray diodes but it does say in the PDF that it has a max Vout of 5.5V but this is obviously not right since I have one driving a 405 that has been happily rolling along for 6 months.

The flex is more efficient than the microboost. So your batteries will last longer.:beer:

I would not jump straight to 900mA especially after the loss you just suffered. If we have run one without degradation @ 600mA I feel the next step should be to jump to 650mA-700mA. Baby steps. That is how the 445 when for me. I was the first to hit 1.6W then it was 1.8W, 2W, 2.1W and others claim to have hit as high as 2.2W.:beer:
 

Milos

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ok,

no, i only meant I would push it as high as 900mA as far as my driver needs would be. If i need to . But if that doesn't make sense, i will see on optical power meter.

I will probably start between 400 and 500mA, and gradually increase shooting for 1W of optical output. I am looking to get to know how diode behaves in that range.

Of coarse, if it doesn't go up in optical output, or does insignificantly for the amount of curent increase, i will note that. But i won't know till i start, damnit. I sort of have time right now, but no diode.

thats how it goes when you have 2-3 hours a week only to mess with lasers :-(
 

Wolfman29

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Hey, so is 450mA a good, low current to give me a nice long lifetime, guaranteed? (Well, 99%, anyway :p )
 

chipdouglas

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^^^ 450 should be a theoretical good safe limit. remember that our diodes werent designed to be moving about constantly so while 450 is good on a bench, you are only 1 drop away from lights out, if that makes sense.

michael.
 

Wolfman29

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No, I gotcha. If I drop it, it's my fault, not the diode's.
 




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