Pre Drilled Heatsink for boards

[robincnn]

Next on the DIY menu.
boards boards boards


Thinking of getting some pre drilled heastinks for the boards. Will take a few weeks.

Boards are about 174mm wide. This profile is about 200mm. Should be good for up to 80 watts.

Option 1:
1 board per heatsink. You can connect 2 or 3 or more of these heatsinks together using an Aluminum L channel. Heatsinks will be pre drilled but L channel will need drilling.

Option 2:
2 board per heatsink. No L channel aluminum required.
To connect 4 boards you can connect 2 of these heatsinks together using an Aluminum L channel.

Option 3:
3 board per heatsink. No L channel aluminum required.

What are these boards
https://www.rollitup.org/t/diy-passive-cooling-with-pin-heatsinks-sst120-and-sst140.906729/page-33#post-13100993

@Stephenj37826

 

[Evil-Mobo]

I will ask here since I think my question got lost in the other thread but what's the Kelvin on these? Can they be ordered in different ratings or all 40 coming are the same?

 

[robincnn]

I will ask here since I think my question got lost in the other thread but what's the Kelvin on these? Can they be ordered in different ratings or all 40 coming are the same?

Only 3000K 80 CRI for now.
Harass @Stephenj37826 for more spectrum options.

 

[Evil-Mobo]

Only 3000K 80 CRI for now.
Harass @Stephenj37826 for more spectrum options.

My concern with the 3K is the 5 foot height limit I have on the closet tent I want to test the dual board setup in..............

 

[Evil-Mobo]

We will need like two gallons of thermal paste for these suckers huh lol.............

 

[Stephenj37826]

We will need like two gallons of thermal paste for these suckers huh lol.............

No thermal paste required.

 

[Stephenj37826]

The 3000k is more like Cree 3500k or so

 

[sixstring2112]

No thermal paste required.

Why no paste?

 

[sixstring2112]

My concern with the 3K is the 5 foot height limit I have on the closet tent I want to test the dual board setup in..............

If your worried about too much stretch dont bro,my plants are only about 3 inches taller under the 3000k cree cobs.

 

[Stephenj37826]

Why no paste?

Not required. Not really sure it would help honestly. The heat is so spread out. Totally different than cobs. As @robincnn pointed out they will run up to 40 watts with no heat sink at all passive lol.

 

[sixstring2112]

I voted 1 board per heatsink.lets us decide how to configure and surely they must be cheaper as singles

 

[Stephenj37826]

My concern with the 3K is the 5 foot height limit I have on the closet tent I want to test the dual board setup in..............

Also one good thing is you can run these very close to the plants as the light isn't as concentrated as cobs.

 

[sixstring2112]

Not required. Not really sure it would help honestly. The heat is so spread out. Totally different than cobs. As @robincnn pointed out they will run up to 40 watts with no heat sink at all passive lol.

So a big ass thermal pad behind those boards on a decent heatsink should be good to 100 to 120w easy?
Still cant figure out how these run 3 or 4 boards off a single driver if they are 100v boards? What am i missing stephen?

 

[Stephenj37826]

So a big ass thermal pad behind those boards on a decent heatsink should be good to 100 to 120w easy?
Still cant figure out how these run 3 or 4 boards off a single driver if they are 100v boards? What am i missing stephen?

You run them in parallel.

 

[sixstring2112]

Maybe a quick chart of how many boards oer driver with just the 4 or 5 most common meanwells would help us understand?

 

[sixstring2112]

You run them in parallel.

Aaahhhhhhhh

 

[Stephenj37826]

See pictures lol

 

[Stephenj37826]

To recap
150 watts. HLG 120H-1400. Minimum 1 board
240 watts . HLG 240H-2100 Minimum 2 boards
320 watts. HLG 320H- 2800 Minimum 3 boards

 

[sixstring2112]

To recap
150 watts. HLG 120H-1400. Minimum 1 board
240 watts . HLG 240H-2100 Minimum 2 boards
320 watts. HLG 320H- 2800 Minimum 3 boards

That helps some,maybe I'll figure it out after they catch on and people start showing what they configure. Still confused as hell as of now.dont we normally use a different type driver for parallel wiring? I mean i have both types now and still no clue how i would run 4 of those boards @ 400w lol

 

[Stephenj37826]

That helps some,maybe I'll figure it out after they catch on and people start showing what they configure. Still confused as hell as of now.dont we normally use a different type driver for parallel wiring? I mean i have both types now and still no clue how i would run 4 of those boards @ 400w lol

Take any of these drivers. Add as many boards as you want. It will divide the wattage among them automatically.

Example

HLG 320H-2800. 3 boards is ~107 watts per board. 4 boards is 80 watts per board. 5 boards would be 64 watts per board. 6 boards would be ~53 watts per board. Do you understand? Kinda like a cob that is ~100 volts. Parallel is easy.

EXAMPLE 2.

HLG 240H-2100

2 boards will be 120 watts per board.
3 boards would be 80 watts per board.
4 boards would be 60 watts per board.
5 boards would be 48 watts per board.

The key is select a driver that has the voltage of one board ~ 100-108 and you can add as many as you like and it will divide the wattage amongst them.