Heatsink for 100w COB LED

Flashlight Modding and DIY Parts
1

Hi Guys.

As part of my quest to learn I have purchased some parts to practise with.

DC converter/booster and a 100w COB LED. I was thinking of using the bigger heat sink in the pic that has a fan attached.

Would I need any thermal paste underneath the chip? I was also thinking of painting the cooler black so I could monitor temp with my IR thermometer.

There is also this I found http://www.ebay.co.uk/itm/Aluminum-Heatsink-for-10-100-W-Watt-LED-Chip-Heat-Sink-DIY-Floodlights-SMD-/111614075008?pt=LH_DefaultDomain_3&hash=item19fcb7a080 that could be useful for other testing project etc.

Thanks for looking.

Dave.

Can’t seem to ad pics.

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HowTo: Adding pictures to posts ;)

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Cheers I just found that…

Will have a look later after work.

4

Hi!

I use old CPU Coolers with heatpipes for 100/120W LEDs and glue them on with Arctic Alumina.

Works perfectly.

Old CPU Coolers for outdated sockets are pretty cheap - you get very good (silent) ones for way less than 20$. Mostly it’s just a bit over ~12$ (in Germany)

Just google the TDP of the cooler before - if it’s higher than 100W - you’re good to go :slight_smile:

5

for experiments i would avoid using AA adhesive, use screws and pase. that heatsink the way it is may be good for few minutes,
i agree using old computer heatsink with fan is a lot better option, however you’ll have to drill holes and cut threads in it. thermal glue is good when you install a led permanently, for experiments, you do not want to do it.

6

Cheers guys.. Will use paste not adhesive. Got me one of these coming http://www.scan.co.uk/products/arctic-cooling-freezer-7-pro-v2-s775-115x-1366-am3-am2plus-am2-939-up-to-130-watts