DIY Passive cooling with PIN Heatsinks SST120 and SST140

[PurpleBuz]

We should probably aspire to "computer overclocker with OCD" level of surface prep and call it a day

(surface area solves this problem too, the Samsung inFlux 09 with 35.2 sq in of surface area to dissipate its 67W needs nothing but a little thermal paste and a couple screws)

ocd overclocker indeed ! some of the tests I have seen indicate that even that's overkill, as long as you have a level surface.

was thinking of using a copper base plate\heat spreader as a cob holder and figured a large surface area would more than make up for an extra thermal epoxy layer. does that make sense ?

 

[Growmau5]

@Bill Lidgate Hey Bill, I was a little harsh with you in one of my replies about the smd strips. Just wanted to apologize and say that your idea has more merit than I thought. Discrete diodes can perform in the same ballpark as cxb cobs when Tj & Tc are taken into account. I have been doing a lot of research on this the last week or so.

 

[Bill Lidgate]

Here is a 2x5 6063 tube I polished up in 15 min with a cheap HF 5" random orbit sander hooked to a Shop vac

A is mill finish from Coastal Aluminum (lots of extruder die striations visible)
B is after 100 grit-> 220 grit gold aluminum oxide
C is after green Scotch-Brite pad-> purple Scotch-Brite pad*
D is after Scotch-Brite Extreme shine pad**-> Scotch-Brite No Scratch pad + Mothers Aluminum Polish

*green http://www.homedepot.com/p/Scotch-Brite-Commercial-Size-Heavy-Duty-Scour-Pad-220-8-CC/202077900)
purple- http://www.homedepot.com/p/3M-4-3-8-in-x-11-in-Coarse-Grit-Metal-Hand-Finishing-Pad-7414NA-CC/100179600?keyword=metal+finishing+pad

** brand new found at my local supermarket $2, http://www.scotch-brite.com/3M/en_US/scotch-brite/tools/~/Scotch-Brite-Extreme-Shine-Pad?N=4337+3293174744+3294529207&rt=d

Note the Mothers polish is messy (no vacuum needed!) and turns BLACK while it polishes, cleanup is with Goo Gone Spray (d-limonene) followed by dish soap/water and then windex

The final surface is a nice hazy mirror, by no means "world class micro inches" which would require more subtle gradations down from 100G->220G->320G->400G->1500G etc. but for a quick 15min its pretty easy and good (and the end product isn't going in the Hubble anyway

 

[Bill Lidgate]

@Bill Lidgate Hey Bill, I was a little harsh with you in one of my replies about the smd strips. Just wanted to apologize and say that your idea has more merit than I thought. Discrete diodes can perform in the same ballpark as cxb cobs when Tj & Tc are taken into account. I have been doing a lot of research on this the last week or so.

I appreciate that! I often find its easier for me to dig the same hole deeper but every so often it pays to dig a different hole entirely; gotta keep an open mind!
(credit to Edward de Bono on the hole analogy)

 

[JorgeGonzales]

I've been eyeing those Samsung strips since another @robincnn thread over here https://www.rollitup.org/t/micro-greenhouse-with-luxeon-xf-3535l-led-strips.875345/ showing small greenhouses with Samsungs and Philips strip leds.

Anyway, good luck with the build. That finish looks great.

Actually, does anybody know if aluminum channel heatsinks have the cojones to handle higher power led strips? Source for good ones? I'm on the fence between that and a monolithic heatsink.

 

[ThaiBaby1]

I've been eyeing those Samsung strips since another @robincnn thread over here https://www.rollitup.org/t/micro-greenhouse-with-luxeon-xf-3535l-led-strips.875345/ showing small greenhouses with Samsungs and Philips strip leds.

Anyway, good luck with the build. That finish looks great.

Actually, does anybody know if aluminum channel heatsinks have the cojones to handle higher power led strips? Source for good ones? I'm on the fence between that and a monolithic heatsink.

I'm thinking 24" of this for 7.68
http://www.heatsinkusa.com/2-079/

 

[Growmau5]

Yeah , I saw them first from his veggie grows. I know that guy @robincnn knows a lot in theory, but I have yet to see any delicious green salad pictures from him. Possibly with a homemade raspberry vineg

 

[robincnn]

samsung 561 strips were around $24 when i got them. Also the lm/w was not as impressive. Price and efficiency wise cobs seem more attractive.
The new samsung strip is more efficient and $20, the one one is now $14 here

I used 2.079" from heatsink USA. 6.080" 4.850" seem good too. With strips dont have to worry about base plate thickness.

I am trying to use these 9W strips for under canopy lighting.

 

[robincnn]

Yeah , I saw them first from his veggie grows. I know that guy @robincnn knows a lot in theory, but I have yet to see any delicious green salad pictures from him. Possibly with a homemade raspberry vineg

Never liked salad.


My grows are not as exciting as yours. Here are some bud shots just for you

 

[robincnn]

Tomato in 3 gallon pot. week 6
Under 2x Vero 29 3500K Khatod 90 optics. 2X2.5 tent

 

[Airwalker16]

samsung 561 strips were around $24 when i got them. Also the lm/w was not as impressive. Price and efficiency wise cobs seem more attractive.
The new samsung strip is more efficient and $20, the one one is now $14 here

I used 2.079" from heatsink USA. 6.080" 4.850" seem good too. With strips dont have to worry about base plate thickness.

I am trying to use these 9W strips for under canopy lighting.
View attachment 3699444View attachment 3699445
View attachment 3699446

How many lumens do those strips put out? And please link to where you get em for $14

 

[ttystikk]

The agricultural industry growing hot house vegetables like tomatoes, cucumbers and lettuce EACH absolutely dwarfs the indoor cannabis growing industry.

Of course, their margins are tighter.

 

[OLD MOTHER SATIVA]

the 1m led tubes i just bought were about 12 each delivered 122 lm/w , 20w
we will be trying them..i gve 8 to myaquaponic bro to put over a 4 x 4 area
i gave a link an another thread here
how does that compare to the strip$?

 

[Bill Lidgate]

The agricultural industry growing hot house vegetables like tomatoes, cucumbers and lettuce EACH absolutely dwarfs the indoor cannabis growing industry.

Of course, their margins are tighter.

yeah the $/lb is pretty loooow. I ran across an organic / hydroponic basil production facility in SE Portland, they used 100% MH lights and had some pretty leggy plants, They gave me about 100 pulled plants for the price of the rubbermaid tote (5$) that I used to make 5 Qts of pesto and start my own grow.

 

[ttystikk]

yeah the $/lb is pretty loooow. I ran across an organic / hydroponic basil production facility in SE Portland, they used 100% MH lights and had some pretty leggy plants, They gave me about 100 pulled plants for the price of the rubbermaid tote (5$) that I used to make 5 Qts of pesto and start my own grow.

Send me their phone number!

 

[robincnn]

How many lumens do those strips put out? And please link to where you get em for $14

http://www.digikey.com/product-detail/en/0/1510-1121-ND
Current - Test 1.35A
Voltage - Forward (Vf) (Typ) 24.7V
Lumens/Watt @ Current - Test 135 lm/W

Thanks to @caretak3r for his post here
https://www.arrow.com/en/products/si-b8t341560ww/samsung-electronics
https://www.verical.com/pd/samsung-misc-products-sib8t341560ww-904038

the 1m led tubes i just bought were about 12 each delivered 122 lm/w , 20w
we will be trying them..i gve 8 to myaquaponic bro to put over a 4 x 4 area
i gave a link an another thread here
how does that compare to the strip$?

these old samsung 2ft strips are 33watts @135 lm/W. Links posted above for arrow and vertical.

lumileds are good too and they have a 3m sticker on back
For strips Search for 'Digikey LED Lighting - COBs, Engines, Modules'
then apply Linear Light Strip and Linear Light Strip flexible as filter.
plenty of options. Then search for the part number of strip in findchips.com
http://www.findchips.com/search/SI-B8T341560WW

 

[caretak3r]

I haven't put mine to use yet, but my ssl 150 660nm reds came in so I'll be putting together a tote grow soon.

 

[JorgeGonzales]

As a vegetarian and gardener, I approve of this thread.

 

[The Dawg]

Ok That's Nice Now Back To Adding The Katoud Len's To The SST 140 Or if Your Sink Has 2 Centered Holes. Its As Simple As Enlarging Them As Outlined In Above Post. Then Buying A Set Of Centering Punches And Playing Whack-A -Mole. Now for Drilling And Taping The 4-40 Holes I Used A 3/32 Drill Bit. This Enlarged The Hole Big Enough Plus Provided Enough Meat For Threads Man It Was Like Spreading Butta I Tell Ya . Now For Adding Holes F

or Your Wires To Run Through. You Noticed I Use The Holes I Just Taped For 4-40 As Guides To Measure 1 1/4 Inch From And Once Again I Play Whack-A-Mole With A Centering Punch And I Drill A 7/32 Pilot Hole Then Enlarging To 13/64 All the While Sloping Cutting Thread Oil Over Everything Every Time. Trust Me This Will Keep You From Making A Future Thread On Does Alum And Water Solution Really Eat An Broken HSS Broken Drill Bit Out Of A Block Of Aluminum, However I Don't Care Just Let It All Hang Out

 

[ttystikk]

What can't you get at Alice's Restaurant?