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ArcticMyst Security by Avery

FREE DIY open source BOOST driver!!! Tested & working!!

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tony1

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Using glue to keep you SMDs in position. Am I right, the glue is not in contact between the component and the conducting area . I had modem where a smd resistor was blown off from its location during a thunderstorm. I found it and it tested good I couldn't solder it back. After many attempts I super glued it and send it back to the company. The company couldn't do anything with it , so they sent me a new one.

Tony
 





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tony1

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Kizdawg,

I haven't come across "Conductive Thermal Epoxy."

I have used solder phaste, is that Ok?

Tony1
 
gillza

gillza

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Arctic Alumina Epoxy - Amazon
Fujik heatsinking glue - DX
 
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Kizdawg

Kizdawg

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Most of them other than say ceramic are somewhat conductive the like arctic silver the main ingredient is silver wich is conductive same with alumina which is also conductive. You need a ceramic base to be non conductive or some other ingredient.
 
benmwv

benmwv

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Alumina isn't conductive at all. That's the one I always use. It's cheap and the is no problem potting the entire driver in it.

Thanks to wee40811 for his donation!
 
Kizdawg

Kizdawg

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Yep I read up on it. That is good news. I dont know why I alway's thaught it was guess from the name. Glad you guy's fixed my thinking.
 
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osmosis321

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Nov 23, 2012
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Hey all, first post for me so I'll introduce myself quickly. The name's Rob and I like lasers and love electronics.
Am I correct in what I'm readng, that populating and soldering these boards is a problem for some? I can help there: with the cheapest, most rudimentary of tools, I'm able to produce finished boards that look just like "the real thing." I've honed my technique to the point that you literally cannot tell the difference between these and something that's been pick-and-placed and done "professionally."
Always glad to help.
 
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trag

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benmwv said:
attachment.php


AC coupling, each division is 10ma high, 100ns long.
So the ripple has spikes about 27ma high. Should be safe for any diode we use.
Click to expand...

I'm probably missing something, but a 27mA spike doesn't seem that safe. Would it be proportional to the regulated current? Reducing the regulated current by 27mA isn't a big deal with a 1W+ laser, but if you only want a few hundred mA, then that's significant. With a PHR-805t, you couldn't set the current much higher than 90mA, otherwise a 27mA spike would kill the diode. Is the spike higher with your AC coupling setup than it would be in a build?
 
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tony1

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I am not sure but from my experience a 27 ma spike should be safe. To be on the safer side it is better to filter the 27ma spike off with a calculated capacitor .
 
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benmwv

benmwv

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The ripple is proportional to the output current. At 90ma it would be like a 2ma spike.
 
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