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Old 06-15-2011, 01:22 AM #17
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Default Re: Custom Heat Sink (request for quote)

Guys I have to eat my hat regarding the diode plug; I did not know what anyone was talking about but re-reading my OP it is pretty clear where that discussion about the diode socket etc. came from.

So Yes, it was my intention to use a "diode plug" as in the attached picture.

So now that I have sufficiently displayed my ignorance, can you be so kind as to educate me on why this is such a terrible idea. My thought was this would make it easy to connect the diode and reduce the risk of messing up the pins, or killing the diode by overheating with solder.

Clearly I don't want to kill my diode with this.

Regards,

-J



Last edited by Jubathoph; 01-15-2012 at 10:25 PM.
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Old 06-15-2011, 01:34 AM #18
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Default Re: Custom Heat Sink (request for quote)

Someone correct me If I am wrong but I believe it is that if the diode pin wiggles and disconnects with the socked even for a millisecond the current will build up and when it reconnects the resulting spike will kill the diode.
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Last edited by lazerman121; 06-15-2011 at 01:34 AM.
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Old 06-15-2011, 01:43 AM #19
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Default Re: Custom Heat Sink (request for quote)

Quote:
Originally Posted by lazerman121 View Post
Someone correct me If I am wrong but I believe it is that if the diode pin wiggles and disconnects with the socked even for a millisecond the current will build up and when it reconnects the resulting spike will kill the diode.
Agreed. Though I might toss in the idea that it's a voltage build up either instead, or in addition, to the scenario you described.

I'm thinking of linear drivers here, and if your diode disconnected, I'm pretty sure the "protective" cap would build up some voltage, and then discharge into the diode upon reconnection.

Though one way or another, whatever the cause, the quick interruption in the circuit is what hurts our diodes.

Honestly, you shouldn't be afraid to solder a 445. If you recognize how much heat they sustain in their actual usage, you'll realize that a quick half second solder-on of a lead isn't going to hurt them. I don't know if this makes scientific sense, but I also have a habit of unplugging my soldering iron right before I solder to the diode, and I usually then also quick touch my hand to a metal portion of the iron (close to the handle so I don't burn myself). The logic there (at least in my mind) being that I'm equalizing the charge between my body and the unplugged iron.
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Old 06-15-2011, 01:51 AM #20
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Default Re: Custom Heat Sink (request for quote)

I would also like to add that a soldering heat-sink is a diode saver. The 445 diode has long enough pins. Its much better than the PHR803T diodes who's pins were as long as the heat-sink was thick.
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445nm 80mW NDB7242E DIY build
473nm 10mW LSR473NL series blue laser module www.lasever.com Review
488nm 5mW Novalux Protera DPSS Laboratory Unit Review
515nm 20mW module
532nm 200mW Suwtech Lab laser
532nm 100mW Suwtech Lab laser

543.5nm .5mW Research Electro-optics Inc Helium Neon
561nm 4.98mW CNI GLP OEM module Review
593.5nm 100mW CNI Lab Dead driver
604nm LHOR-0150 2nd line
612nm 2.1mW LHOR-0150
632.8nm Melles Griot Bare Tube (05-LHR-004-347)
632.8nm .4mW Spectra Physics 155 HeNe
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650nm 5mW red
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Last edited by lazerman121; 06-15-2011 at 01:55 AM.
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Old 06-16-2011, 03:09 PM #21
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Default Re: Custom Heat Sink (request for quote)

Slightly modified, with "Fins" to help dissipate heat. Also, access to diode was increased from 10mm to 15mm.

Last edited by Jubathoph; 01-15-2012 at 10:25 PM.
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