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Old 08-16-2010, 04:29 PM #1
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Default First successful build - 800mW 445nm

I know, pretty crappy to have been a member for two years, and first now have completed my first real build (except a LPC in an aixiz that died within 2 min)

Anyways, it's nothing special, just an XJ-A130 @ 850 mA in a Jayrob 18650 kit.
It has a copper heatsink.

The first time I assembled it and turned it on, nothing happened. Needless to say, I nearly shit my pants. So I disassembled it and hooked the diode up to a spare rkcstr, while repeating "Oh shit, oh shit, oh shit" in panic.
I saw a faint blue light, as if the diode was LED'd, and I nearly shit my pants for the second time. Then I turned the pot and realised it was just below treshold current. The diode was fine. Phew!

So I wondered what was wrong with the jayrob kit. And then I tested the battery, and it read 0V. Ah.
So I charged the battery and assembled the laser again, and this time it worked perfectly.

I don't have a (powerful enough) LPM but it should be outputting close to 800mW. The color is a beautiful bright blue. The beam is clearly visible even in lit rooms, I don't have much to compare it with, but it's definately not too far behind my 200mW green module in brightness.

I was hoping for a bit better burning abilities, but oh well. It burns much better than any other laser I own, of course. But I couldn't light a match the hard way, or burn paper very well. It burns holes through both, but it doesn't ignite it :/

Here's some pictures (barely any smoke) :






PS: Unfortunately I didn't build this for myself, but for some other guy from Norway. I'm going to forward the laser tomorrow.



Last edited by Grix; 08-16-2010 at 05:12 PM.
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Old 08-16-2010, 04:36 PM #2
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Default Re: First successful build - 800mW 445nm

Congrats on your first build! Hope I'm soon to follow.
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Old 08-16-2010, 05:03 PM #3
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Default Re: First successful build - 800mW 445nm

Congrats, nice build. Glad your diode didn't fry
Are you using a Flexdrive or a microboost ?
With that copper HS may be you could grow up the ma's keeping a shorter duty cycle.
About burning... you have to choose... But I think that at 850ma it will put more like ~700ma. That is a pretty setup for a more long living diode, I always keep prudent the first builds of a diode. Particularly I HATE that my first build for a new diode gets fried in the first days when diodes are expensive or hard to find.
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Old 08-16-2010, 05:28 PM #4
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Default Re: First successful build - 800mW 445nm

Great first build! What goggles are you using? (if any because you're sending this one off) Reason why I ask is because I saw your comment on YouTube and I want to link to good goggles.
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Old 08-16-2010, 05:57 PM #5
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Default Re: First successful build - 800mW 445nm

I use focalprice goggles

They usually suck, so definately don't link to them! But I was lucky, and happened to get a perfect pair, doesn't let a photon through.

I've heard good things about dragonlasers' goggles, and O-like's other pair ( http://www.o-like.com/index.php?main...e229dfffc9ebf6 )
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Old 08-16-2010, 07:07 PM #6
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Default Re: First successful build - 800mW 445nm

You mean those $8 focalprice anti-green goggles ? So they really are good against 445 too ? That would be too good to be true !
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Old 08-16-2010, 07:48 PM #7
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Default Re: First successful build - 800mW 445nm

One of those focalprice goggles is the same as my Optotronics goggles that I use for my 445nm lasers.
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Old 08-16-2010, 08:32 PM #8
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Default Re: First successful build - 800mW 445nm

what driver are you using? and you are luck that you had a battery read 0v and it was still able to take a charge. i've had a couple do that but most of the time they are completely dead. nice build man!!

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Old 08-16-2010, 09:18 PM #9
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Default Re: First successful build - 800mW 445nm

I really liked the build, nice one however I bet your gutted that you have to give it away!.

I am looking forward to my first build. thanks for the o-like safety goggles link, a fair price I think
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Old 08-16-2010, 10:25 PM #10
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Default Re: First successful build - 800mW 445nm

Congrats! Looks pretty great.

On another note, scale your images down! It is unnecessary to have them that big.
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Old 08-17-2010, 03:47 AM #11
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Default Re: First successful build - 800mW 445nm

Yeah, if you can see the "grain" in your photos, they're usually too big, especially for a forum.
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Old 08-17-2010, 09:52 AM #12
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Default Re: First successful build - 800mW 445nm

Heh, sorry about the images. I'll scale them down next time.

Quote:
Originally Posted by chipdouglas View Post
what driver are you using? and you are luck that you had a battery read 0v and it was still able to take a charge. i've had a couple do that but most of the time they are completely dead. nice build man!!

michael
I'm not actually sure what driver it is
I got the hot option, so it's the one Jayrob put in there. The microboost or flexdrive.
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Old 08-17-2010, 10:39 AM #13
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Default Re: First successful build - 800mW 445nm

Norway hu?
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Old 08-17-2010, 10:40 AM #14
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Default Re: First successful build - 800mW 445nm

Aye grix, nice laser! we have the same amp anyway, what have you heard about those olike goggles? i have some coming in soon, is there a review?
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Old 08-17-2010, 10:51 AM #15
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Default Re: First successful build - 800mW 445nm

Yeah Norway! Norway rocks! Grix is a great member of this forum. I sent an amplifier to Oslo, last year. It was an audiophile type that he received pro-bono and built 75% by me and 25% by another audio engineer. Kudos! Repped you for that one mate!
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