DIY Passive cooling with PIN Heatsinks SST120 and SST140

robincnn

robincnn

Well-Known Member
miggaman said:
I was looking at some reflectors for the Vero 29, on this page:

http://www.ledil.com/products?ds=1&mn=&ld=308&md=&xd=&mh=&xh=&mt=&mf=&xf=&sf=&ty=&fm=&sm=&cn=&vc=&io=&tro=&trt=0&tpo=&tpt=0&tr=&tp=&fr=&st=0&pg=0&lo=&ol=0&of=0&od=0&oh=0

In particular, I wonder if the the asymmetric C14346_ANGELETTE-WAS (4th reflector on that page), and/or the ANGELINA-S, or ANGELINA-M, or ANGELINA-W are compatible with the new urchin heatsink.
Click to expand...
Yes new urchin heatsink in pre drilled for reflector adapters. C13584_CLAMP-VERO29 uses the same 2 holes as the Vero 29 COB.

Not sure about Asymmetric C14346_ANGELETTE-WAS
From drawing it looks like it will work with the C13584_CLAMP-VERO29

Looks like ANGELINA-S, or ANGELINA-M, or ANGELINA-W will work with C13584_CLAMP-VERO29
upload_2016-11-2_22-41-12.png
 
sixstring2112

sixstring2112

Well-Known Member
My bet is the center of the cob directly behind on heatsink,round pin is cooler.and temps on corners of square sinks are much cooler but chip remains close on cob edge.but center cob round pin win :)
In theory the heavier sink should win if same aluminum is used for both designs
 
robincnn

robincnn

Well-Known Member
For all those hardcore DIY'ers who are:
1) Not afraid to drill and tap baking sheets or Heatsink USA
2) and willing to spend $75 + Shipping on something new and efficient
3) not afraid to venture into the bright unknown

*Credits to @Stephenj37826 from these boards
38*8=304 LED Samsung 561C Top Bin diodes on a 11.25x7 inch board
http://www.samsung.com/global/business/led/support/tools/calculator-pkg

38 diodes per string and 8 strings.
0.065ma per string
0.065*8= 520ma
6.8W*8=54.4 Watts per board is 187.4 lumen per watt.

You will need to run 1825 at 17 watts to for similar efficiency.
upload_2016-11-2_22-59-18.png

These boards can be run at upto 150 watts
upload_2016-11-2_22-54-17.png

Not available online. contact through website to orders. Got only 40pcs stock for now. $75 each and i don't set the price.
https://northerngrowlights.com/community/contact


upload_2016-11-2_22-46-52.png

upload_2016-11-2_22-47-28.png


at 150 watts
169ma per string
8 strings
=1352ma total

18.6W per string.
8 strings
=148.8Watts
159Lm/w

upload_2016-11-2_23-3-56.png
1825 at 150 watts
upload_2016-11-2_23-6-47.png
Can anyone check my math here ? @Stephenj37826

These boards are a little easier to cool as the heat is spread across a large area. With COB the heat is concentrated.
 
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robincnn

robincnn

Well-Known Member
Danielson999 said:
From what you were saying it seems like splayed heatsinks are a design that might not be pursued because of the difficulties that arise in production. Which is why I figured it's going to become a DIY mod (which is will anyway).
Click to expand...
Lets decide the fate of 140 and splay tomorrow.
Yes the production is difficult and the splay design don't come with a base plate as clean(scratch free and smooth anodization) as the 140mm. However they look good from top . o_O

Flower your heatsinks for better performance.
SST X comes splayed. You guys can splay 120mm on your own and it will help with performance. Will leave that test for next time.
 
T

ThaiBaby1

Well-Known Member
Hi Robin,
What driver do u suggest for these boards? Heatsinks from heatsink usa will be way too spensive, and i doubt baking sheets will be enough if u crank em up. Any other ideas?
 
dabby duck

dabby duck

Well-Known Member
@robincnn

Would it be possible to run a Version 7 Vero 29 @ around 150 watts each?

4x in a 4x4' tent?

Do you happen to have a graph displaying the output efficiency at that wattage or have a link? I can't seem to find any info on the V7 chips, so many good graphs round here...!
 
robincnn

robincnn

Well-Known Member
CobKits said:
so wait, theres no -058 heatsinks coming?

a suggestion: if you want to measure temp droop measure initial and steady state voltage to chips in your test
Click to expand...
Will take longer to get next batch. For now may have to drill the 4th hole on my own for some of these SSTX
 
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Stephenj37826

Stephenj37826

Well-Known Member
ThaiBaby1 said:
Hi Robin,
What driver do u suggest for these boards? Heatsinks from heatsink usa will be way too spensive, and i doubt baking sheets will be enough if u crank em up. Any other ideas?
Click to expand...
I have tested 2 of these boards at 75 watts each on a plain 18x24 .125 inch aluminum plate with a fan blowing across the back and it stayed cool to the touch. Like maybe 5° warmer than ambient. I will test again. I would've used thermal camera but it was bare aluminum.

These are designed to be ran in parallel.

So they fit

HLG 150H C1400 2-4 boards works well

HLG 240H C2100 . 3-5 boards works well

HLG 320H C 2800. 4-6 boards works well.

More or less can be added to any of these combos.

I'll check at the Home Depot for stock size aluminum plate the works right off the shelf and do a quick throw together in a couple days and show how easy these are to build with/cool.

So in general the cost of these boards for the efficiency is right in line with the best cobs just different form factor.

A very low profile design can be had here as well as even coverage for tents. If one is Iooking for ultimate efficiency these are the ticket. I've got a a production prototype built that pulls 165 watts at the wall that is amazingly bright for such low wattage. 2 of these in a 4x4 would be very good.

6 boards in a 4x4 with 2 240 drivers would be an amazingly good amount of light. I'm not sure I'd want more than this. I've tried higher light levels and saw no real gain.

These 561c top bin are 20-25% higher efficacy than 561b.........
 
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