Single COB builds

Dreddd

Dreddd

Well-Known Member
Funny how i've been planning this build for weeks and only now noticed this thread.. anyways just finished building 10 autocobs, parts ordered from cobkits and CDI, it was pretty fun, but i gotta mention that if your gonna build your own be aware that the BJB mounting holes dont actually line up with the pre-drilled holes on the ModuLED heatsink, those are meant for direct cob mounting, you actually have to use the semi open holes that are built into the fins near the center, those line up with the BJB, but they arent threaded for screws so you'll have to thread them with a tapper like i did.

Used Luminus CXM-22 3500k 90CRI for all of them, these things are bright as hell. :cool:

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Thanks for the cobs cobkits!
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Tim Fox

Tim Fox

Well-Known Member
Dreddd said:
Funny how i've been planning this build for weeks and only now noticed this thread.. anyways just finished building 10 autocobs, parts ordered from cobkits and CDI, it was pretty fun, but i gotta mention that if your gonna build your own be aware that the BJB mounting holes dont actually line up with the pre-drilled holes on the ModuLED heatsink, those are meant for direct cob mounting, you actually have to use the semi open holes that are built into the fins near the center, those line up with the BJB, but they arent threaded for screws so you'll have to thread them with a tapper like i did.

Used Luminus CXM-22 3500k 90CRI for all of them, these things are bright as hell. :cool:

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Thanks for the cobs cobkits!
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they look SOOOO good
 
CobKits

CobKits

Well-Known Member
megas are good heatsinks, the only thing i dont like about using the hbgs is the 1-2 efficiency hit from
1. driver is 4-5% less efficient than a (cheaper) HLG series
2. heatsink would be less efficient with the driver blocking convection - maybe hit your chip for another few percent efficiency

i envision this type of scenario:

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Dreddd

Dreddd

Well-Known Member
CobKits said:
megas are good heatsinks, the only thing i dont like about using the hbgs is the 1-2 efficiency hit from
1. driver is 4-5% less efficient than a (cheaper) HLG series
2. heatsink would be less efficient with the driver blocking convection - maybe hit your chip for another few percent efficiency

i envision this type of scenario:

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i'm sure it has some effect but i cant imagine it being that big, i think you're forgetting that most tents have good air movement and the examples you show are for true passive cooling, plus the HGB-60 is actually a little smaller then the ModuLED, it doesn't restricts airflow on the outer fins at all.

from testing i've done the whole autocob draws 60W from the wall when just turned on, and draws 58.5W after an hour when it reached its stable running temp, this was in a 25c room.

interesting that the Luminus draw's more then the citizens bigsmo uses..
 
Evil-Mobo

Evil-Mobo

Well-Known Member
Dreddd said:
i'm sure it has some effect but i cant imagine it being that big, i think you're forgetting that most tents have good air movement and the examples you show are for true passive cooling, plus the HGB-60 is actually a little smaller then the ModuLED, it doesn't restricts airflow on the outer fins at all.

from testing i've done the whole autocob draws 60W from the wall when just turned on, and draws 58.5W after an hour when it reached its stable running temp, this was in a 25c room.

interesting that the Luminus draw's more then the citizens bigsmo uses..
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All (4) in my 3x3 draw 244 watts total at the wall..........really not finding anything not to like about these lights lol

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Dreddd

Dreddd

Well-Known Member
Evil-Mobo said:
All (4) in my 3x3 draw 244 watts total at the wall..........really not finding anything not to like about these lights lol

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humm seems pretty consistent with what i'm getting, wonder why bigsmo rates these as 55w each? and yeah these are probably my end game, they're just so modular.. and if a new cob hits the market with considerably better efficiency it would literally take 5 minutes to switch out the cobs..
 
Evil-Mobo

Evil-Mobo

Well-Known Member
Dreddd said:
humm seems pretty consistent with what i'm getting, wonder why bigsmo rates these as 55w each? and yeah these are probably my end game, they're just so modular.. and if a new cob hits the market with considerably better efficiency it would literally take 5 minutes to switch out the cobs..
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For me especially that I am always growing different strains and even ages the ability to adjust the COB's individually is priceless.......
 
Humanrob

Humanrob

Well-Known Member
Anyone feel like putting together a parts list with sources for their DIY build, so newbies have a quick reference for compatible combinations? It's just the cob, heatsink, and driver, nice and simple.

@topcat did that a few posts back (minus sources), I'd love to see more combinations...
 
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HydoDan

HydoDan

Well-Known Member
Manufacturer: Mean Well USA
Part Number: HBG-60-1050

Manufacturer: MechaTronix
Part Number: MODULED MEGA 13450-B-HBG

Manufacturer: MechaTronix
Part Number: HBG-60 CONNECTOR SET

Manufacturer: MechaTronix
Part Number: M3 X 6 SELF-TAPPING SCREW

Manufacturer: Citizen Electronics Co., Ltd
Part Number: CLU048-1812C4-503M2K1

GrafTech International Holdings Inc. G10113 Sheet10: eGRAF HITHERM 1205 TIM for Citizen CLU04X (10 pc/sh)

Manufacturer: BJB GmbH & Co. KG
Part Number: 47.319.2315.50
 
Humanrob

Humanrob

Well-Known Member
@HydoDan -- Thanks for the list!

HydoDan said:
I really don't need any more lights, but I can't stop! Gotta build another one.. then maybe one more.. maybe two..
This shit's addictive!
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btw, that is exactly how I feel! I just went through an over-the-top build/rebuild phase out of nowhere, and I won't even use any of these lights until November! (between now and then its all about outdoor for me) But I LOVE the simple elegance of these lights, and given how I grow this is where I'll be going next. Or... maybe some QB's... or both...
 
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SouthCross

SouthCross

Well-Known Member
HydoDan said:
Manufacturer: Mean Well USA
Part Number: HBG-60-1050

Manufacturer: MechaTronix
Part Number: MODULED MEGA 13450-B-HBG

Manufacturer: MechaTronix
Part Number: HBG-60 CONNECTOR SET

Manufacturer: MechaTronix
Part Number: M3 X 6 SELF-TAPPING SCREW

Manufacturer: Citizen Electronics Co., Ltd
Part Number: CLU048-1812C4-503M2K1

GrafTech International Holdings Inc. G10113 Sheet10: eGRAF HITHERM 1205 TIM for Citizen CLU04X (10 pc/sh)



Manufacturer: BJB GmbH & Co. KG
Part Number: 47.319.2315.50
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What's the running wattage of that set up? What is the HID wattage equivalent?
 
Humanrob

Humanrob

Well-Known Member
sanjuan said:
https://www.rollitup.org/t/mean-well-hbg-60-1400-on-moduled-giga-with-cxb3590.910676/
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Thanks for that link, sanjuan, great information there. I see the date that you started that thread -- 05/29/16 -- shows how long I've been out of the loop. When I'm not actually building things, I don't spend a lot of time in the LED section.

If I do spend time here I find out about all the new stuff out there and then I start trying to figure out how to justify building more lights. I built 4 new fixtures (two with 2 cobs, two with 1 cob each), and it all started because I was moving some 3070's from fan-cooled to passive heatsinks, and I broke a cob. I had to order a new one. And somehow hitting the "purchase" button one time opened the door to building several new lights. LOL, it's all good, I'll use them.
 
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