Fanleaf's Huge 42 COB Array Build Plus Other Builds

Fanleaf's Huge 42 Cree CXB3590 COB Array Build Plus Other Builds

Cannabeard said:
Jimmy already changed my mind on Cree, the new Vero 29's are capable of outputting​ 3x the umoles of the sun for about $30 CAD a chip.

Would I be running 2x HLG 240h C1400b to run 10 Veros at 50watts? Or what's the wattage I should be aiming for? Going to order all the fun stuff tonight and buy the frame parts now.
Click to expand...

You can use the 240h-c1400 to run 5 COBs but. You need to trim back the dimmer about 10%. That means at that currant (1400) you get a problem where the last little bit on the top end sweep (90%->100%) doesn't make the cob any brighter but it does add heat watts to the cob. Adding watts that do not make the chip any brighter is a massive waste of energy (in the form of heat instead of light) and will shorten the lifespan of the chip.
Two ways to deal with this are 1) add a resistor inline between the 1st and 3rd pole (a little complicated for novice builders) or 2) use a "crappy" 100k linear pot that resists less than 100k. This is easy as around 90% of the pots I test are lower than 100k.
I tested a few and found that a pot with 80k to 86k at max works almost perfectly.
The easiest option however is to just dim down until you see the light dim a bit.

If you u guys need a video on selecting pots or on running 5 COBs on a 240h-c1400 I'll make one tonight.
 
JimmyJames905 said:
You can use the 240h-c1400 to run 5 COBs but. You need to trim back the dimmer about 10%. That means at that currant (1400) you get a problem where the last little bit on the top end sweep (90%->100%) doesn't make the cob any brighter but it does add heat watts to the cob. Adding watts that do not make the chip any brighter is a massive waste of energy (in the form of heat instead of light) and will shorten the lifespan of the chip.
Two ways to deal with this are 1) add a resistor inline between the 1st and 3rd pole (a little complicated for novice builders) or 2) use a "crappy" 100k linear pot that resists less than 100k. This is easy as around 90% of the pots I test are lower than 100k.
I tested a few and found that a pot with 80k to 86k at max works almost perfectly.
The easiest option however is to just dim down until you see the light dim a bit.

If you u guys need a video on selecting pots or on running 5 COBs on a 240h-c1400 I'll make one tonight.
Click to expand...
Hopefully next build I'll be well enough versed to attempt something like that. I definitely wouldn't be opposed to a video explaining it more!

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Fanleaf's Huge 42 Cree CXB3590 COB Array Build Plus Other Builds

Well if you u look at the spectrum for flowering plants you can see that 660nm is the optimum range for reds with red absorption into the deep red (660nm) and far red spectrum at 700nm. Unfortunately none of the COB makers I know of have a far red chip. Vero bxrc-17e comes close with a 650nm peak and a taper into the 700 mm range. So does the new citi vivid series light Pink chip at around 640 peak. The Vero is available is a 29mm while the light pink citi is only available in the smaller LES.
With 3000-3500k 90cri chips you get a red peak around 630nm.
So if you want to go more red you have to try the citi light pink, Vero29 17e or go back to the very small Cree "xp-e" horticultural SMD chips.
 
Buckshot317 said:
If your wanting deep reds, put 10 of Oscan ssl on 140mm pin heatsink, just like the timber kits. Easy to make (just soldering)
Click to expand...
I may look into adding that after! If I can get thru this build haha At the moment I'm trying to figure out what potentiometer I need, that future electronics has pages but none look like what I'm looking for :/

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Fanleaf's Huge 42 Cree CXB3590 COB Array Build Plus Other Builds

Cannabeard said:
I may look into adding that after! If I can get thru this build haha At the moment I'm trying to figure out what potentiometer I need, that future electronics has pages but none look like what I'm looking for :/

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Click to expand...

I think they don't have any 100k linear pots. Sorry. I thought they had them.
I buy mine locally (recommended) so I can test them before I buy.

I'll mail you one if you need it.
 
Well $700 later I have everything ordered except the small stuff like the pots, wire, screws ect. I'm also inclined to wire in a multimeter and still debating on the Buck styled control panel or just mounting it all on the frame but my frame will be modeled after his only 40"x20".

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