Kaidomain copper mounted led's

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Ejected Filament
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So basically there is little point filling that void in Noctigons/Sinkpads with solder and filing/lapping flat as Ive seen done? Its just a lack of faith to do so?

WarHawk-AVG
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Ejected Filament wrote:
So basically there is little point filling that void in Noctigons/Sinkpads with solder and filing/lapping flat as Ive seen done? Its just a lack of faith to do so?

well not entirely no…the heat is going to travel the path of least resistance (same as electricity)…it will fan out from the center solder point then into the star, then into the pill…the beautiful thing is now it takes that teeny 1/8” square (the thermal slug the emitter is mounted on) and turns it into an effective 10/16/20mm square surface (whatever the size of the star)…then it has to force it’s way thru the RTV/epoxy which has a lower thermal conductive rating as the metal above it

The filling in and lapping just ensures you have MORE metal to metal contact rather than uneven surface

this is what it looks like “microscopically” between the star and the pill, the RTV/epoxy fills that space, yes it’s lower thermal resistance that copper or aluminum but MUCH MUCH better than static air

This is why you use a VERY thin layer of the mounting compound…just to fill the gap..NOT to create a gasket

pinkpanda3310
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I guess you could reflow the led straight to a big lump of copper for best thermal path. H)

Then drive the crap out of it J)

Yes, I know, I will get more heat and less efficiency with those numbers…. but I get lotsa light!

  

M4D M4X
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Big Smile nice!

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RMM
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Ejected Filament wrote:
So basically there is little point filling that void in Noctigons/Sinkpads with solder and filing/lapping flat as Ive seen done? Its just a lack of faith to do so?

There will be some thermal improvement by doing so.  The question is whether or not it will be enough to be worth the effort.  When you're looking for every last bit of efficiency and time/effort aren't at issue, it may be.

Mountain Electronics : batteries, Noctigon, and much more! What's new? 

TexasToasted
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The black topped copper MCPCBs at LCK-LED are also not copper all the way through. They do have a dielectric layer on top of the copper.
I’m disappointed, but they are still handy since they are thicker than most other MCPCBs and sometimes I need a little extra height on my LEDs to get them lined up in the reflector where I like.

WarHawk-AVG
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Scrape that center square out…fill with solder, reflow emitter back down…not as good as already made…but better than the dielectric layer

leaftye
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Or after cutting out the dielectric, build up the copper with electrolytic plating.   I'm not sure how the +/- pads would be shielded though.

The low mode should be lower.

comfychair
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Drill a hole, poke copper rod through, whack with hammer, file off the excess bit on the back.

http://75.65.123.78/6XL2/Dsc06974.jpg

http://75.65.123.78/6XL2/Dsc06975.jpg

http://75.65.123.78/6XL2/Dsc06977.jpg

http://75.65.123.78/6XL2/Dsc06983.jpg

http://75.65.123.78/6XL2/Dsc06996.jpg

http://75.65.123.78/6XL2/Dsc06997.jpg

http://75.65.123.78/6XL2/Dsc06980.jpg

M4D M4X
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very nice job comfy!

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i do not work in "reviews, deals and codes" for the time being
maybe M4D M4X will return one day, but until then:

THANK YOU FOR YEARS OF YOUR SUPPORT AND FRIENDLY CONTACTS!

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