Cutter Electronics: Complete DIY COB kits

anomolies

anomolies

Well-Known Member
BOBBY_G said:
9 works better but do a simple arrangement with 3 heatsinks @ 3 cobs each (omit the middle one if you want 8) and then 2 angles at the end tying them all together. i think @Airwalker16 build is like this, among others
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Yea thats what i plan on doing.. the mauviii kit only runs 8 on the driver and i figure having a 9th in the middle is a waste since the other 8 cobs will all overlap the middle anyway. This is for a 4x4 space so id like it to be symmetrical.

But like you said, do a box pattern with the 8 cobs... im just not sure how to arrange the aluminum... will i need 6 bars going one way (2 bars per 3 cobs] and 1 or 2 bars going perpendicular to support everything?
 
Airwalker16

Airwalker16

Well-Known Member
anomolies said:
Yea thats what i plan on doing.. the mauviii kit only runs 8 on the driver and i figure having a 9th in the middle is a waste since the other 8 cobs will all overlap the middle anyway. This is for a 4x4 space so id like it to be symmetrical.

But like you said, do a box pattern with the 8 cobs... im just not sure how to arrange the aluminum... will i need 6 bars going one way (2 bars per 3 cobs] and 1 or 2 bars going perpendicular to support everything?
Click to expand...
I'm pretty sure the maukit comes with an LGSU250-1400D which can run a maximum of 5 (4 is sold with the kit) per driver. Not 8...you could easily do the 9 with just 2 drivers. One of the perks of the Pairui drivers.
I wanted 1750ma though. Not 1400. I coulda got a HLG240H-C1400B and ran 5 and 4 on another. But just didn't wanna go that low of amperage.
 
StashToker

StashToker

Well-Known Member
http://www.cutter.com.au/proddetail.php?prod=cut2903
I think he means the 8 cob 400 watt kit.
anomolies said:
Yea thats what i plan on doing.. the mauviii kit only runs 8 on the driver and i figure having a 9th in the middle is a waste since the other 8 cobs will all overlap the middle anyway. This is for a 4x4 space so id like it to be symmetrical.

But like you said, do a box pattern with the 8 cobs... im just not sure how to arrange the aluminum... will i need 6 bars going one way (2 bars per 3 cobs] and 1 or 2 bars going perpendicular to support everything?
Click to expand...
 
StashToker

StashToker

Well-Known Member
How much heat would 2 8 cob kits produce vs 1000 watt hps vented? Anyone that has switched know the # difference?
 
Airwalker16

Airwalker16

Well-Known Member
StashToker said:
How much heat would 2 8 cob kits produce vs 1000 watt hps vented? Anyone that has switched know the # difference?
Click to expand...
All I can say is a hell of a lot less. I have an 8 cob diy, granted it is actively cooled, but it literally puts off NO heat whatsoever.
 
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BOBBY_G

BOBBY_G

Well-Known Member
energy is energy. 1000W plugged into the wall has to go somewhere. light energy is photons. photons hitting plant will heat up the leaf and also energy toward photosynthesis. obviously a room is not a black box simple introduction of water causes transpiration during photosynthesis which also has a cooling effect.

light used by plants vs wasted light not used by plants (infrared in hps case) would tend to make a difference in room temperature. but an hid and an led in two boxes with no plants would create the same temperature rise. . infrared is famous for it but ALL light carries radiant energy which heats up surfaces

the appeal of LEDs is the usable fraction of light is higher. thus to get 400W of usable light, you can use a 1000W hps or a 600W LED and get the same amount of light. in this case a typically large heat sink has the easy task of dissipating 200 W of waste heat. the other 400W of 'heat' is radiant as light and heats up other surfaces, not your heat sink
 
Growmau5

Growmau5

Well-Known Member
1000 joules of energy per second (watt) consumed produces 3400-4000 BTU/hr doesnt matter if its LED, HPS, T5, the worlds biggest vibrator. Energy consumed produces heat.

LED pulls ahead because you get more plant usable photons per watt without the high IR % that contributes to additional "heat radiation" from every object in the room that absorbs it.

thats it guys. these COBs dont run on magical unicorn farts. they produce heat and abide to the same laws of physics that everyone on earth does, except Matt Damon.
 
anomolies

anomolies

Well-Known Member
So i went to home depot and couldnt figure out how many bars of angled alum i need. Lol. Theyre precut in 36 inch lengths which is perfect for my purpose, i think.

Growmau, any chance you could do a quick tutorial for the 8 kit? Doesnt need to be a video ill just go off the 4kit vid. I just cant decide how much angled aluminum i need to be cost effective and still have a stable LED bracket support. They come in 36 inch lengths and i was wondering how many i would need to arrange the 8 cobs in a square, spaced 10 to 12 inches apart.
I dont like to be spoonfed (which you pretty much have done, for that im really thankful) but i also dont want to waste money... a simple diagram would be so helpful and appreciated
 
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anomolies

anomolies

Well-Known Member
Yea 465.33 is US Dollars /denomination. Its correct, the amount is converted by your bank at time of purchase
 
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