Hi Guys,

just wondering if anyone knows where I can get the cup style LED Heatsinks, something like this
http://www.diytrade.com/china/4/products/5321144/Aluminum_LED_light_lamp_Cup_Heat_sink_Radiator.html

somewhere that doesn't have a 2000 min order.
I'm designing a LED light bar for an aquarium and figure it'd be cheaper to use these over a large solid chunk of heatsink.

 

If your willing to settle for a square one instead of the round style you could use a CPU heatsink which are cheap($2-$8) and available most places dealing with electronics and/or computers

If you know someone with a lathe you could have it made INTO a round one.

 

It sometimes pays to find big chunks of aluminium that are for something else.
These make great heatsinks and you get a free saw.

http://www.toolspot.co.uk/product/aluminium-frame-junior-hacksaw-with-aluminium-mini-mitre-box

 

Go to the dollar store.

Look at all of their cheap trinkets.

They have a handful of aluminimun "necklace charms" and other crap that work great as heat sinks and are "pretty".

You must use thermal grease, because nothing is perfectly flat.

AND you dont get a thermal profile from the dollar store..

But for $1, you can plot your own.

I have also gotten (for $1) "MEMORY HEAT SINKS" that are 1 inch square heatsinks to be placed on the memory on a motherboard. 8 came in a pack for $1.

 

thanks guys, I've got a few old CPU heatsinks so that's deffinately an option, however I'm likely to be using a few hundred of these long term so the dozen heatsinks I've got would run out very quickly and I'd like to keep it uniform if possible...

I found this though,
http://www.satistronics.com/high-po...le-for-3w-and-5w-power-led-53mm22m_p2161.html

how well would that work with one of these?
http://ledsupply.com/07007-pw750-n.php

I'm quite the noob when it comes to thermal conductivity, I know I need a heatsink & thermal paste but that's about it.

would that heatsink work with the hole in the centre?

 

I have no idea why they have a hole in the center. That makes no sense.

That is EXACTLY where you want to draw the heat away! THAT is where the junction is!

UGG.... $1.65 from china.... You get what cha' pay for.

 

lol, didn't you suggest going to the 1$ store?
there's also this one
http://www.satistronics.com/high-po...r-10w20w-and-30w-power-led-90mm30m_p2162.html

Edit: looks like just the right sized hole to drop a temp sensor down to see how the hole actually affects heat transfer from LED. tempted to perform an experiment.

 

Thats the irony.

I would still recommend the dollar store.

I have "pretty" paperweights that were 3 for $1. Pop off the little clay heart and bam! a 2oz heat sink. Works great. You can get them by the case load.

I am using Cree xlamps at 350mA, and they can run all day on one of these paperweights. Even the one that has father spelled wrong.

 

I think I'ev decided to give them a go even though unsure about the hole in the centre. after searching around this appears to be quite common for the high powered LED heatsinks. I'll get one and test it out to see what happens.