• Here is a link to the full explanation: https://rollitup.org/t/welcome-back-did-you-try-turning-it-off-and-on-again.1104810/

COB LED for veg?

Airwalker16

Airwalker16

Well-Known Member
Hey @Safehaven ,

Cutter use's Pairui brand drivers. They have the same aluminum housing, same 5 year warranty, MUCH more options of current on their 250 model (240MW equivalent), & have a "D"(dimmable version) that works identically to Meanwell. I'll be buying them and using them. Mainly because Jerry at King Brite won't have hlg-240''s till end of February. And potentiometer wiring is simple. Blue (purple on Pairui)Left post, White(green on Pairui) Center post. PAIRUI has a third Yellow wire I and Rahz cant seem to figure out the use for. But just my 2 cents. ;)
 
S

Safehaven

Active Member
Airwalker16 said:
So you're doing how many 3590's per what length and profile of heatsink?
Click to expand...
I decided in order to get the optimum coverage, I will mount each COB on its own 5.886" x 10" heatsink. I will then connect the properly spaced 10" heatsinks together with aluminum angle iron. For veg, I will space the COBs 24" on center, 4 in a row, 2 total rows.
 
Airwalker16

Airwalker16

Well-Known Member
24" on center? See mine will be 3-5.886"x30" heatsinks, 3 cobs each. 9 total. On angle bar, like yourself, spaced 5.886"(6")-9"-5.886"(6")-9"-5.886"(6") totalling 36". So it'll be 30"x36" when completed. Can you explain it more like that I don't get it.
Which profile?
 
G

grouch

Well-Known Member
When wiring up your potentiometer to the driver make sure you use another resistor inline so you don't dim the driver to far (down to zero) as many have warned it may damage the driver. You can run them without the extra resistor, just don't turn them all the way down.
 
Rahz

Rahz

Well-Known Member
The B model can't be dimmed to zero so there's no danger of damaging the driver with a pot, but a few extra K ohms on top of that 100 is a good idea to insure the pot doesn't prevent reaching 100% brightness while on. A switch could be added in the series to turn the pot off but a 10K ohm resistor is cheaper/easier to incorporate.
 
S

Safehaven

Active Member
Airwalker16 said:
24" on center? See mine will be 3-5.886"x30" heatsinks, 3 cobs each. 9 total. On angle bar, like yourself, spaced 5.886"(6")-9"-5.886"(6")-9"-5.886"(6") totalling 36". So it'll be 30"x36" when completed. Can you explain it more like that I don't get it.
Which profile?
Click to expand...

Attached is my layout and a detail of a single, 4 COB fixture.
 

Attachments

littlejacob

littlejacob

Well-Known Member
Safehaven said:
I received my potentiometers today. I am unsure as to how to wire them. Google has not been all that helpful. There are three pins on the pot. The two wires from the driver go to which two leads on the pot?
Click to expand...
Bonjour
Meanwell hlg 3 in 1 dimming function thread
Dim+ middle...Dim- with 10k ohm resistor left...nothing on the right one
CU
 
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