Heatsinks for DIY LED lamps

SupraSPL

SupraSPL

Well-Known Member
The scale is 20 pixels/inch. I think that arrangement is pretty close to ideal but I was just roughing the position of each COB to try and compromise cooling and spread. You could mount them with precision if you cared to run the math and make the measurements, but in practice it is not necessary.
 
AllDayToker

AllDayToker

Well-Known Member
SupraSPL said:
The scale is 20 pixels/inch. I think that arrangement is pretty close to ideal but I was just roughing the position of each COB to try and compromise cooling and spread. You could mount them with precision if you cared to run the math and make the measurements, but in practice it is not necessary.
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Alright, so is there like a good cut off point with them? Like having them too far that there is a noticeable gap, or having them too close where I'm losing light from overlapping.
 
SupraSPL

SupraSPL

Well-Known Member
Yes there will be an ideal distance. It would be hard to know what that distance will be because it depends on how the lenses are mounted and how they will interact with your LES. You will be able to see it though and I would estimate ~12-15"
 
AllDayToker

AllDayToker

Well-Known Member
SupraSPL said:
Yes there will be an ideal distance. It would be hard to know what that distance will be because it depends on how the lenses are mounted and how they will interact with your LES. You will be able to see it though and I would estimate ~12-15"
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Any with the staggering it allows me to get a little further between each row correct? So if I spaced them perfectly apart across the 62" heatsink in two rows of four, staggering the rows, would that be my best option? So 15 1/2" between each, then stagger to cover that 15 1/2" gap better?
 
brettsog

brettsog

Well-Known Member
Ok so I have bought my cobs (3 x vero29 3000k). Would I be better going with individual heatsinks ando fans (alpine 11 or 64 plus) or I can buy a 700x150x20mm heatsink which I would hope to cool them passively? Any thoughts? I will probably be running them at around 2.1a and 75w each
 
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alesh

alesh

Well-Known Member
brettsog said:
Ok so I have bought my cobs (3 x vero29 3000k). Would I be better going with individual heatsinks ando fans (alpine 11 or 64 plus) or I can buy a 700x150x20mm heatsink which I would hope to cool them passively? Any thoughts? I will probably be running them at around 2.1a and 75w each
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I don't think that such a heatsink will be enough to cool them passively at 75W. More info would be helpful (preferably a link).
 
brettsog

brettsog

Well-Known Member
littlejacob said:
Bonjour
TME is cheaper for a 1000*165*35...42 € with vat
Have a great day ★
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Much better choice, so could I run 3 vero 29s with that heat sink say at 1.05a passively cooled?

Edit: I found these

http://www.digikey.co.uk/product-search/en?KeyWords=1061-1153-ND&WT.z_header=search_go

I don't even have to drill to attach a fan by the looks of it,

Edit 2: I found the fans to go with it as well. For an individual setup the fan is 13 and the heatsink 8.50. So 21.50 and it's made for the vero 29 and just realised it's the recommended cooling option for them on the bridgelux data sheet.
 
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littlejacob

littlejacob

Well-Known Member
QUOTE="brettsog, post: 11928579, member: 423334"]Much better choice, so could I run 3 vero 29s with that heat sink say at 1.05a passively cooled?[/QUOTE]
Bonjour
There's the formula in heatsink for diy thread and in heatsink in europe thread...it is in inch that you change in cm...I hate math...try to ask someone there and translate in inch!
But I am sure that you would need only one fan if you need some...a 140mm @9V...less than 2w...
Have a great day ★
 
salmonetin

salmonetin

Well-Known Member
...maybe... for 4 pin...

http://www.frozencpu.com/products/23517/ele-1301/4-Pin_PWM_Power_Distribution_PCB_8x_Way_Block_MMT-PCB-8P-44P.html?tl=g34c17s424

http://www.frozencpu.com/products/25650/ele-1333/Phobya_PWM_8x_4-Pin_Splitter_81136.html?tl=g34c17s424

http://www.frozencpu.com/products/6084/bus-107/AC_to_DC_Adapter_-_110V_AC_to_12V_5V_DC_Converter_w_Standard_4_Pin_2000mA_Max.html?tl=g47c271

http://www.frozencpu.com/products/9106/bus-192/AC_to_DC_Adapter_-_110V_AC_to_12V_DC_Converter_w_Standard_4_Pin_5000mA_Max.html?tl=g47c271s670

http://www.coolerguys.com/840556029977.html

...links are only for examples or ideas...

:peace:

Saludos
 
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