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Old 04-20-2013, 07:59 AM #225
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Default Re: GB: PL520 murder fund

Plot up to 400mA is done on diode #1. I'll make the charts after I have all the data from both diodes.
https://docs.google.com/spreadsheet/...1E&usp=sharing

That's all for tonight, more tomorrow.



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Old 04-20-2013, 11:14 AM #226
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Default Re: GB: PL520 murder fund

Great work and easy to understand
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Old 04-20-2013, 11:19 AM #227
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Default Re: GB: PL520 murder fund

Good work diode detective ARG !! Enjoying the results in google docs
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Old 04-20-2013, 10:42 PM #228
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Default Re: GB: PL520 murder fund

Hot/Cold tests are in the spreadsheet for diode #1. I think the diode may have gotten damaged in the hot tests as the efficiencies in the cold test are worse than the room temp ones.
Edit: Never mind. I think it's due to the condensation on the lens.

https://docs.google.com/spreadsheet/...1E&usp=sharing

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Old 04-20-2013, 11:04 PM #229
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Default Re: GB: PL520 murder fund

Do not use an X-Boost with more than 4.2V! Direct word from Angelos, these weren't meant for that type of voltage. I'm running my 520 fine with an X-Boost and a single 18650. These are boost drivers, they were MADE for LOW voltage builds.
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Old 04-20-2013, 11:12 PM #230
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Default Re: GB: PL520 murder fund

I made a mA/mW chart from the data.

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Old 04-20-2013, 11:18 PM #231
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Default Re: GB: PL520 murder fund

Thanks Blord! The diode is now up to HALF AN AMP and still lasing I thought it was about to die soon after 400mA.

By the way guys, you can open a chat on the wide of the spread sheet. Click on the "Other viewers" in the top right.
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Old 04-21-2013, 12:15 AM #232
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Default Re: GB: PL520 murder fund

It stopped outputting light at 760mA. I drove it up to 1A after that and it didn't die, still outputs the same when I turn the current back down. This is the most resilient diode I have ever come across.

From the data of the first diode I would say a cap of 350mA for these diodes.

I think to kill it I will have to see what kind of wavelengths it makes at 100°C

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Old 04-21-2013, 12:23 AM #233
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Default Re: GB: PL520 murder fund

This seems to be a common theme with newer diodes that are coming out. We have seen it in diodes like the 445's, 638's and that new 405 that Lazeerer got a few samples of which was also a 3.8mm diode.
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Old 04-21-2013, 12:44 AM #234
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Default Re: GB: PL520 murder fund

I'm glad they are this resilient now. My first few laser diode experiences were not happy ones

I hope nobody minds if I go in 10-25mA steps for the second diode, this first one took all afternoon to catalog. I was expecting these to die at around 400mA so I thought 10mA steps would be ideal.

I'll make the graphs after the data from both diodes is obtained.
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Old 04-21-2013, 06:29 AM #235
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Default Re: GB: PL520 murder fund

I did drive mine up to 500mA and it is still kicking perfectly though the output saw no benefit at over ~350mA. I am now set on driving mine a little harder than I was first going to. I did however notice a barely visible wavelength difference as I cranked mine up past 400mA.
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Old 04-21-2013, 06:39 AM #236
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Default Re: GB: PL520 murder fund

I am thinking about driving mine at 300mA, does this sound reasonable for decent lifetime?
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Old 04-21-2013, 06:54 AM #237
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Default Re: GB: PL520 murder fund

I don't think any of us have enough research on them to even know the direct effects of high current on the lifetime. They seem resilient but until we have a lot more runtimes on them I don't see it being possible to make a very good guess. Based on our driving of other diodes we typically get away with double currents and the diodes appear to survive quite well.
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Old 04-21-2013, 07:07 AM #238
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Default Re: GB: PL520 murder fund

Oh well...I still have to figure out driver setup. I have a C6 Host coming my way from Mohgasm....I may just wire it up in there for the time being. I could use a Linear Driver with 2 Cells for an easy build that I could take apart once I get my Host and Driver for the MS-V4 build....
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Old 04-21-2013, 07:12 AM #239
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Default Re: GB: PL520 murder fund

Seems to be asymptotic at around 130mW... So since they're that resilient, might as well target to run them at 130mW?
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650nm 18x DVD <in progress>
650nm 4mW Sure module in penhost
650nm 2mW pen pointer
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Old 04-21-2013, 08:05 AM #240
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Default Re: GB: PL520 murder fund

From my exp its generally best to run below the maximum output point. For my builds, I usually target somewhere in the middle of between the point of greatest efficiency and greatest output.
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NEW 1.5-2.5W 445nm Blue Ice/Black Ice/Flash Freeze Lasers FREE US Shipping!
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Some of the collection:
-405nm -811mW - S06J@490mA - Aurora C6
-445nm -3.04W - 9mm@2.2A - Ultrafire L2
-445nm -2.95W - M140@2A - "Hyperion" Black Ice/Flash Freeze hybrid
-445nm -2.2W - M140@1.8A - Aurora C6
-445nm -1.93W - M140@1.8A - Blue Ice by yobresal
-450nm -1.67W - PLTB450@1.7A - Survival Laser S4
-488nm ~25mW - "The Beast" JDSU Argon Ion
-520nm -132mW - PL520@390mA - Minisabre V2
-532nm -374mW - Skylaser HL532 300mW
-532nm -90mW - SD-303
-532nm -110mW - 50mW FastTech Module - DTR Skyray
-543nm ~.3mW Melles Griot HeNe
-638nm -1.3W - ML501P73@1.5A - Survival Laser S4
-638nm -1W - ML501P73@1.4A - Ultrafire WF-602C
-650nm -324mW - 3.8mm OpenCan@428mA - C6
-650nm -128mW - 3.8mm OpenCan@200mA - C6 (Mohgasm JAD)
Laserbee II 3.2W and 5W Ophir LPM
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