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685nm 35mW Laser Diodes on Ebay!






Kmor2004

Kmor2004

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I got some of these last week, and tried them out on on my PLTB just ot see how well the driver worked and what I could get out of them, the 1st one I pushed upto ~55 give or take 5mW, then I bumped it up one more notch and it LED'd, tried teh second one just to see how high it got, however in the process of testing it I decided to adjust some of the numbers for the driver and diode got a zapped but I didn't re-alize it till diode 3 which I knew could get to 50-55mW range, but still did teh same thing and now I'm out of them. :oops::banghead:

At least I learned a valuable lesson, don't have an LD connected while adjusting code and reprogramming the chip, which also probrably means make sure the the PLTB is on before testing a LD.
 
lazeerer

lazeerer

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^ Your Problem was trying to push them to 50+mW.

I have tested Quit a few of these and there has even been Hard data tested on these posted in this thread. "Post 129"

I find that these are very sensitive diodes. Not as bad as 635nm but close. A few mW more then they like to run at and there dead.

These should not be run past 68mA MAX. I would say to be safe 65mA. Which should give you a Max of ~40-45mW with an AR coated Acrylic lens.

Hope that helps.:beer:
 
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Kmor2004

Kmor2004

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NO, No I think you misunderstood my post, the 1st one was LED'd because I wanted to push till it broke, the 2nd and 3rd ones died because I had an Idea about the calculations going on inside my microcontroller, so I reprogrammed it WHILE the lasers were still connected not thinking that the reprogramming would effect them, when in fact I beleive during the programming all the I/O pins go high or turn on for a slip uS which caused the drivers transistor to go wide open dumpin all 3A into the diode then turning back off, basicly th equivilint of forgeting to discharge the cap of a driver then connecting the diode to the driver.

That is what I beleive happened since diode #3 was working fine at 40mA and giving 40-55mW raw output, until I reprogrammed the micro-controller.
 
Fiddy

Fiddy

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I just got 6x of these suckers, and boy are they sensitive.

65mA is the lowest current setting i could set on the flexdrive and it LED'd 2 of these diodes :(

3rd one is running 60mA with a Groove2 driver and is making 38mW with a aixiz acrylic lens no coating.
 
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cheech226

cheech226

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hope this isn't considered necro but -
drake was kind enough to send me one of these as a bonus and i'd like to know if i could run it with a linear, say a ghost drive @ 50ma with just one cell?
 
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midias

midias

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cheech226 said:
hope this isn't considered necro but -
drake was kind enough to send me one of these as a bonus and i'd like to know if i could run it with a linear, say a ghost drive @ 50mw with just one cell?
Click to expand...


I don't know if you could hit 50mw thery led very easy I only got about 35mw
 
midias

midias

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I put mine in a cheap pen host with a LM317L TO-92 driver and two 10440 AAA liion batteries.

Cheap build for a cheap diode but remember the LM317L is 1.2/R for current, I think I ran around 50ma for mine.


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