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Subject: Re: Anybody use NS102 Laser Diode Power Supply?
Date: Wed, 4 Dec 2002 23:32:01 +0000 (UTC)
NNTP-Posting-Date: Wed, 4 Dec 2002 23:32:01 +0000 (UTC)
User-Agent: tin/1.5.14-20020926 ("Soil") (UNIX) (Linux/2.4.19 (i686))
Paul Gaastra wrote:
> We have bought an NVG NS102-200K Laser Diode Power Supply from DigiKey
> (their part number 38-1009-ND) and hooked up an appropriate laser diode
> (digikey 38-1027-ND). The diagram in their catalogue is wrong (pads A and C
> swapped compared to NVG diagram (http://www.nvginc.com/ns102dri.htm)).
> To my question. I didn't try a new laser diode with a new power supply
> soldered up correctly but with used (possibly faulty components) I did get
> the laser diode going very brightly when first connected. Then I twiddled
> the potentiometer and the diode only gave of a small amount of light forever
> Can anyone tell me if it's wrong to twiddle the pot with the unit powered?
> Do you normally just solder the thing up and see it work first pop?
Laser diodes can fail after only a few nanoseconds of more than their rated
If you twiddled the pot, and any noise caused it to exceed the rated power
of the diode by much, or your twiddling did, then that's the answer.
There is however a simple fix.
Buy a new laser diode.
http://inquisitor.i.am/ | mailto:email@example.com | Ian Stirling.
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