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Old 01-01-2011, 09:27 PM #1
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Default My 1.25A 445nm has survived 30min runtime.

I was playing my 445nm laser last night and after that I put the lenscap back on and left it on the table. Somehow the laser wasn't turned off. After 30min I grab the laser again and it feels very warm but not too hot to hold it in the hands.
I thought "OH NOOOO, another laser went to the scrapyard"
But the lasergods was favoring me. Everything was alright, nothing has taken damage but the lenscap. The 18650 battery, flexdrive and the diode have survived the stress test. It did left an big scatter around the laserdot. After cleaning the diode window and the glasslens, the laser shines happily ever after.

Moral of this story, buy transparant lenscap.

perfect oval imprint on the lenscap


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450nm 240mW PL450 C6
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589nm 100mW PGL-III-C-589
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638nm 175mW Ehgemus, 1W Rook
660nm 1216mW Skylaser PL660, 263mW LPC826 C6
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Old 01-01-2011, 09:47 PM #2
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Default Re: My 1.25A 445nm has survived 30min runtime.

Good to hear these cree setups can handle accidental long run times.
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Old 01-01-2011, 09:50 PM #3
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Default Re: My 1.25A 445nm has survived 30min runtime.

WOW. ..

30 minutes of on time on that host is nuts. On my Stainless steel versions of that host i cant even get more then 4 minutes of on time before it starts to get Hot.

You are one lucky Guy. Good start on the New Year. Iam surprised it dint melt the end cap or even damaged the diode. How bad was the 18650 cell drained.?
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Old 01-01-2011, 10:10 PM #4
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Default Re: My 1.25A 445nm has survived 30min runtime.

The battery was a Ultrafire 18650 2400mAh. In this setup the drain from the battery is 2.35A. In one hour the battery should be drain empty, but after 30min the battery was still running at max.

I think the copper heatsink has saved my laser. The laser didn't burned a hole in the lenscap because the focuspoint was set op infinity. But it did heat up enough for an imprint.
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685nm 33mW Fujitsu FLD6A2TK C6
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Last edited by Blord; 01-01-2011 at 10:24 PM.
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Old 01-01-2011, 10:13 PM #5
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Default Re: My 1.25A 445nm has survived 30min runtime.

I do have to say I love the polished copper heatsink, looks great.
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Old 01-01-2011, 11:09 PM #6
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Default Re: My 1.25A 445nm has survived 30min runtime.

Man, these 445nm diodes just keep surprising me with their astonishing durability. That is incredible.

BTW, it might be a good idea to snip that nub off your "dust cap". It will keep it from smudging the lens window.
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Old 01-01-2011, 11:30 PM #7
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Default Re: My 1.25A 445nm has survived 30min runtime.

Quote:
Originally Posted by Kevlar View Post
BTW, it might be a good idea to snip that nub off your "dust cap". It will keep it from smudging the lens window.
I know the issue, I used to cut it off but the nudge inside the cap is a fraction bigger than the aperture of the lens. Therefore the nudge will never touch the lens unless you push the cap very hard on the laser.

I have now a GITD green cap but it is a color mismatch. It is from the 3-color pack from DX: green, orange and black but I need red and blue...
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405nm 400mW S06J C6
445nm 3W Big Boy, 2.8W Dominator, 2.4W Steel Laser
450nm 240mW PL450 C6
473nm 100mW PGL-III-C-473
520nm 55mW Skylaser PL520
532nm 821mW Skylaser PL532, 133mW Jetlasers Ti-B
589nm 100mW PGL-III-C-589
635nm 70mW Sanyo SenTorch
638nm 175mW Ehgemus, 1W Rook
660nm 1216mW Skylaser PL660, 263mW LPC826 C6
685nm 33mW Fujitsu FLD6A2TK C6
780nm 150mW Dilda
808nm 640mW C6

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Old 01-01-2011, 11:41 PM #8
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Default Re: My 1.25A 445nm has survived 30min runtime.

You can buy blue ones like i did.

Here:
DealExtreme: $2.68 Silicone Tailcap for Flashlights (Blue 10-Pack)

There smaller in size then the standard ones but they fit nice for capes. But not for tail clicky's.
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445nm 3.6W Monster Freak TEC 9mm, 3.1W Fat Boy Build , 2.9W Big Stainless , 2.7W Big Black, 2W Arctic G2 , 1.8W C13
473nm 178mW CNI-PGL-III-C , 56mW CNI-PGL-III-C
488nm 52mW OPSL SAPPHIRE 488-50, 59mW SS Melles Griot BCD-50&BCD-25 35mW
515nm 83mW Direct Green Diode Fully Custom Host
532nm 617mW RPL Style , 213mW CNI-PGL-III-A , 120mW DIY SS C3
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Old 01-02-2011, 04:41 AM #9
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Default Re: My 1.25A 445nm has survived 30min runtime.

Blord what is the driver set to? I am assuming a flex v5.
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Old 01-02-2011, 12:14 PM #10
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Default Re: My 1.25A 445nm has survived 30min runtime.

Well the title of the thread says 1.25a so Im guessing 1.25amps.
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Old 01-02-2011, 12:55 PM #11
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Default Re: My 1.25A 445nm has survived 30min runtime.

The flexdrive v5 was set on 1.25A. The current draw on the 18650 battery is 2.35A.
The flexdrive needs more current to boost the voltage and for the efficiency lost.
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445nm 3W Big Boy, 2.8W Dominator, 2.4W Steel Laser
450nm 240mW PL450 C6
473nm 100mW PGL-III-C-473
520nm 55mW Skylaser PL520
532nm 821mW Skylaser PL532, 133mW Jetlasers Ti-B
589nm 100mW PGL-III-C-589
635nm 70mW Sanyo SenTorch
638nm 175mW Ehgemus, 1W Rook
660nm 1216mW Skylaser PL660, 263mW LPC826 C6
685nm 33mW Fujitsu FLD6A2TK C6
780nm 150mW Dilda
808nm 640mW C6

I have copper 501B and Dominator lasers for sale !
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