fermintm
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M140 diode broken?
- Thread starter fermintm
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AnthoT
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fermintm
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AnthoT
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Thats normal
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The lines are more pronounced than produced by either of my M140s but they appear normal to me. It is likely just a slight variation of the diode.
fermintm
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Power has decreased to about 30 mw
Everything has been to cut the wires and re-solder the diode. :cryyy::cryyy:
Everything has been to cut the wires and re-solder the diode. :cryyy::cryyy:
AnthoT
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what current is it at?
fermintm
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1500ma
It worked perfectly until I decided to cut the wires because they were too long.
From there, the laser emits very little light now. I used to have to wear goggles.
I guess the diode has received some electrostatic discharge and therefore this also.
AnthoT
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And you are getting 30mw??! It's a zombie then :cryyy:
fermintm
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If. I'm afraid so.
With the crisis we have in Spain, decided to spend some money that cost me a big winner in a laser ...
Now I have a burned diode :banghead: :cryyy: :cryyy:
AnthoT
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Possibly not...
You said you cut the wires & re attached them, is it connected solid, try tapping the soldering iron quickly & melting it again, also make sure there isn't like 1-2 strands of wire, make sure it's ALL hooked up 
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As clear as the picture is, It's hard to tell whether part of the emitter is burnt or not.
fermintm
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Definitely this burned.
The diode becomes very hot with hardly emit light.
The diode becomes very hot with hardly emit light.
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Okay then. yea well if it gets hot it's indeed a LED. sorry about your loss I have lost many 445s during my journey in lasers Others have burnt hundreds..
I have lost many 445s during my journey in lasers Others have burnt hundreds..
DTR
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Is it possible after the wires were cut and you were working on shortening them the driver may have been inadvertently powered without a load even for the briefest of time? If so the cap may have charged and spiked the diode when you went to reconnect it.
AnthoT
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Well guess you should just buy a new diode
Maybe you'll get lucky and get a freak one
Maybe you'll get lucky and get a freak one
