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Old 06-28-2017, 09:15 PM #129
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Default Re: 505nm and 480nm diode RESULTS

Quote:
Originally Posted by CynicalBrad View Post
AND that "2 day" priority mail to them means less that 2 weeks or something crazy like that.
I once had a packag shipped from I believe texas to alabama take close to 40 days when it was shipped 2 day priority mail.

And it is good to see that you got your diode paul.
Yep. I also sent about a year ago one of my lasers to a member in the Netherlands and it went to the Netherlands just fine, then went to Canada, then back to the Netherlands..... wtf..... lol.

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Old 06-28-2017, 10:32 PM #130
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Default Re: 505nm and 480nm diode RESULTS

Quote:
Originally Posted by paul1598419 View Post
I have a home health care nurse coming to do some wound care in a couple of hours. Then I will be busy pressing and metering the power and wavelengths of the 13 diodes I received from ZRaffleticket. As soon as I have enough of these done to get a good idea where they all will seem to going, I will post these results. It will probably be about 6 hours from now.
Awesome - Looking forward to the results! I really wanna see how far these things can be pushed...

Quote:
Originally Posted by paul1598419 View Post
I have an excellent story about networking. As most of you know, the 505nm diode that I was supposed get get last Saturday was delivered somewhere, but not to me. Yesterday, I saw a postal carrier next to my house and told her about my problems with the post office and how they claimed to have placed it at my front door and it was now my problem.

A few minutes ago that same postal carrier knocked on my door and handed me my package. She said she had found it two blocks over at another house and remembered my name and story and rushed over to give to me. Her name is Jody and I will not be forgetting her name any time soon.

However, the post office and their employees are scum, the way they tried to sweep this under the carpet and make it my problem and, to an extent, my fault.
It's also really good to hear that the other diode got sorted out. With the post office operating in the red all the time I guess it's no wonder they just threw you under the bus. Sucks that it happens, but at least it all worked out!
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Old 06-28-2017, 11:45 PM #131
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Default Re: 505nm and 480nm diode RESULTS

Well, here are some results everyone has been waiting for. It took much longer to set up and do the testing as I'm not getting around as well as I did just a few months ago.

I started off pressing one of the 480nm diodes and checking the wavelengths and power at increasing currents.

At 5.5 volts Vf and 58 mA it is 471nm. Not very high at all.
At 130 mA it was 473nm
At 145 mA it was 475nm
At 160 mA it was still 475nm and the power though a G-2 lens was 75 mW
At 175 mA it was 477nm and 81 mW
At 200 mA it was 478nm and 92 mW. BTW, at this current the Vf was 7.1 volts.

I stopped there, but berlieve it could be pushed harder. I was too afraid of possibly killing it to push it any harder than that. I will get around to the rest of the 9 480nm and 4 (now) 505nm soon and post my results here. I hope this has whet your interest for more results to come.
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Old 06-28-2017, 11:51 PM #132
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Default Re: 505nm and 480nm diode RESULTS

Holy sh*t. Yes, I am interested. That's a low-Wl diode going that high.... mmmmmmmmmm....
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Old 06-28-2017, 11:59 PM #133
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Default Re: 505nm and 480nm diode RESULTS

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Originally Posted by ZRaffleticket View Post
Holy sh*t. Yes, I am interested. That's a low-Wl diode going that high.... mmmmmmmmmm....
I'm so very happy you approve. I'll do my best with the rest of them.
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Old 06-29-2017, 12:07 AM #134
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Default Re: 505nm and 480nm diode RESULTS

I can't wait till I get one! I'm definitely going to push it.
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Old 06-29-2017, 12:19 AM #135
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Default Re: 505nm and 480nm diode RESULTS

Also Paul, looks like the efficiency isn't dropping off at 200mA. It's actually still going up. Feel free to try pushing it a little more
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Old 06-29-2017, 12:34 AM #136
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Default Re: 505nm and 480nm diode RESULTS

I have to be very careful as it is all on me if one of these dies. If you give me a current that you feel safe with me pushing it to, I will. Just lat me know what that limit is. If it dies then, I'm in the clear.
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Old 06-29-2017, 12:38 AM #137
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Default Re: 505nm and 480nm diode RESULTS

Try it up to 225mA and see what it's outputting. If it's 104mW or less, cut it there. Otherwise go up to 250mA and no higher.

If it pops, it's on my hands, not yours. Do it for science

Edit: I had the math wrong on the previous post, before anyone comments. Oh well, doesn't change the fact I want to see this pushed 100mA more than rated for.
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Old 06-29-2017, 12:53 AM #138
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Default Re: 505nm and 480nm diode RESULTS

Okay. I will go as far as 250 mA and no further. I'll do it slowly to try to minimize the risk. It's difficult to measure wavelength and power at the same time. As the light gets brighter I have to change my fiber optic cables position to get a reading that doesn't smash against the upper limit on the spectrometer.
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650nm 65mW pointer
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Old 06-29-2017, 12:57 AM #139
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Default Re: 505nm and 480nm diode RESULTS

ah, I wasn't too familiar with how that worked. Lemme know how it goes!
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Old 06-29-2017, 01:02 AM #140
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Default Re: 505nm and 480nm diode RESULTS

480nm at 100mw

This interests me greatly.

I might have to plan my first "low power" build using this.
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Old 06-29-2017, 01:04 AM #141
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Default Re: 505nm and 480nm diode RESULTS

Thanks for testing, Paul!
With those results and the fact they are going to be generally available I'm inclined to push mine as well.
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Old 06-29-2017, 01:26 AM #142
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Default Re: 505nm and 480nm diode RESULTS

Okay, guys. At 230 mA it hits 110 mW. I wasn't able to take a spectro reading too. Should I stop there or go for 250 mA? I'm waiting for the limit to take the next spectro reading as there is little need to know what this one diode will do all along the current curve.
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Old 06-29-2017, 01:28 AM #143
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Default Re: 505nm and 480nm diode RESULTS

Oh, that surprised me. I guess take it up to 250mA, go for it.
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Old 06-29-2017, 01:33 AM #144
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Default Re: 505nm and 480nm diode RESULTS

While I await my diodes from DTR's wonderful service, I wonder if it might be of interest to run some sort of "binning group buy" where we grab a large lot of diodes, bin them, and somehow sell them based on the wavelength. I certainly respect that buying stock diodes isn't influenced by binning (thanks DTR) but want the chance to have a more ideal wavelength, even if it costs something. That way there might also be a way for people who don't care about 1nm difference to save some money by getting a "less desirable" 504-506nm or something.
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