The Chinese Quantum Board Knock Off Builds

[ChiefRunningPhist]

I have these boards. Do not wire them in series. They get super hot even with good sinking. And they have a ton of voltage drop going in one side, and out the other side of the strip.

6 strips in series, is ~150v.

Are you saying that all the board traces and components have an inherent resistance value rated for 24v but because it's in series that the excess of 150 total volts minus the rated 24 volts is what's heating up your first few strips? The traces aren't big enough to handle the entire circuits voltage and are expelling that resistance as heat? That the the first few strips handle much more of the excess voltage than the end strips? That the traces are so small that passing 150v through them is to much to handle because they only big and wide enough for 24v?

Ya @ApfelStrudel I don't see how that's not plausible??

I run 6 of them in parallel on a HLG-240H-24A

Edit: wired in a parallel I pushed 2.5A through these boards.

...

I'm running the 6 i have now at 1666mA.
View attachment 4258169

2.5A ÷ 6 is only 410mA??

1.66 × 6 = ~10A

How were you wiring them up initially? With 2.5A in parallel? 2.5A each strip?

 

[ChiefRunningPhist]

Series or parallel it's god damn same shit if boards are seeimg the same power. What you're saying is total bullshit. Either wired series or parallel, at 100W those boards are gonna put off same ammount of heat.

Bollox

P. S. : and I have yet to measure that humongous voltage drop you're talking about. Get your wiring in check and then talk some more bullshit

Are yours wired in series? How many?

 

[whytewidow]

6 strips in series, is ~150v.

Are you saying that all the board traces and components are normally rated for 24v but because it's in series that the excess of 150 total volts minus the rated 24 volts is what's heating up your first few strips? The traces aren't big enough to handle the entire circuits voltage and are expelling that resistance as heat? That the the first few strips handle much more of the excess voltage than the end strips? That the traces are so small that passing 150v through them is to much to handle because they only big and wide enough for 24v?

Ya @ApfelStrudel I don't see how that's not plausible??


2.5A ÷ 6 is only 410mA??

1.66 × 6 = ~10A

How were you wiring them up initially? With 2.5A?

Yes not all of them got hot. The first 2 strips got hot. Very hot. That's my guess. Passing that much voltage through them I'm assuming exactly what you said. They just arent built to the specs for that. Plus I ordered s6 bin. And i clearly got s3. I was refund money back. Bc they were cheaper. They dont use the amount of copper they say. And everything else. The guy that sells them on ebay even says they should only he wired in parallel. And hes the dude who designed them originally. The 96 diode sunboard didnt exist until he placed a huge order for them. And then the companies on Alibaba picked up on them. Just like they do qb knockoffs. But anyway I had them wired in series first. They way anyone would hook them up. And they got super hot. So I changed to parallel. And not a problem. And then even pushed them clear to 2.5a per strip. 1250mA per row. I was just giving my experience with them. Until dude thinks he knows everything. I didnt say they wouldnt light. But they were not designed to be run in series. To save money on production. Only applying 24vdc through them you dont have to have as large pathway. But running 200+ VDC through them it alot more. And even ledgardner hooked his first set up in series. And he had bad voltage drop. I think he did 18 strips. In one side out the other. By the time he got to the end. They didnt even light. And the ones that did. Didnt light up evenly. So he swapped to parallel. And ta da. They work and lit fine.

 

[whytewidow]

6 strips in series, is ~150v.

Are you saying that all the board traces and components have an inherent resistance value rated for 24v but because it's in series that the excess of 150 total volts minus the rated 24 volts is what's heating up your first few strips? The traces aren't big enough to handle the entire circuits voltage and are expelling that resistance as heat? That the the first few strips handle much more of the excess voltage than the end strips? That the traces are so small that passing 150v through them is to much to handle because they only big and wide enough for 24v?

Ya @ApfelStrudel I don't see how that's not plausible??


2.5A ÷ 6 is only 410mA??

1.66 × 6 = ~10A

How were you wiring them up initially? With 2.5A in parallel? 2.5A each strip?

I'm running them on a HLG-240H-24A 10a now. 10.0÷ 6=1.6666667 or 1666mA

Before I had a different driver. Wired in series. That's when they got hot. On a hlg240-1400b so it put 170+ volts at the first initial strip. And it got hot.

24v x 6 strips =144vdc constant current hlg240-1400 driver in constant current mode is 89-149v so I was right where they should've been. And run at 700mA per row on the strip. Max says 900mA so I was on the lower side of current. So my wiring was correct. But the first side of the first strip got so hot. I couldn't even touch it.

 

[ChiefRunningPhist]

These are QB304+'s (38S/8P; 48 epistar, 256 lm561c)...


Anyone wanna tell me why the 660nm diodes look more red than the 561c's??

660nm = 4500k
561c = 3000k

Am I just buying 48 less efficient diodes? Isn't the lm561 in the 4500k spectrum a better diode?

 

[fragileassassin]

Because they are red.
Kelvin is a measure of the visable color of light but that doesnt mean itll have the same wavelength (nm) combinations.

This is the 561c and some random 660nn led. We are sacrificing some of our overall power to supplement that specific wavelength into our spectrum because the diodes we are using dont offer much intensity in that wavelength.

 

[ChiefRunningPhist]

MH flower about the same as white LED (just less efficient)?? ..

 

[Labrador weed]

YES!! i promise its going to make you feel dumb just like it did for me though.....
and yes, the dimmer takes direct control of the driver and will make it range up to 100% have confirmed pulling 318w out of my 320 drivers with it at 100%
The only downside I have for the dimmers is that your lights wont come back on after power loss and restoration to the dimmers. Ill probably be getting a battery backup for just the dimmers at some point. If the dimmers stay unpowered, your lights will turn on and itll run the driver at 100% like there's no dimmer there. but if the dimmer gets power back itll shut your lights off until you manually adjust the dial or use the remote.

Theres a cover on the top. Turn the dial part over and pry up on the little tab things on the bottom to pop the face off.

Just so you know As long as the dimmer isn’t plugged into the timer than the lights should come back on where you left them every time

 

[fragileassassin]

Just so you know As long as the dimmer isn’t plugged into the timer than the lights should come back on where you left them every time

Yes im well aware, ive done a full grow on them now.
Unplug the dimmer with your lights on and plug it back in and youll see what I was talking about.

 

[Labrador weed]

Yes im well aware, ive done a full grow on them now.
Unplug the dimmer with your lights on and plug it back in and youll see what I was talking about.

Ok I try.
And yeah my b I figured you knew that I just wanted to make sure because i Plugged my dimmer into the timer and couldn’t figure out why it kept resetting.

 

[fragileassassin]

Ok I try.
And yeah my b I figured you knew that I just wanted to make sure because i Plugged my dimmer into the timer and couldn’t figure out why it kept resetting.

yeah thats because of what i was talking about.
If the dimmer loses power, even for a second, you have to manually turn it back on.
Our power seems to be pretty stable here, but it is a concern of mine. I guess its better to get extra hours of dark than it would be if they were getting extra light. I check on them several times a day.

 

[Labrador weed]

Yes im well aware, ive done a full grow on them now.
Unplug the dimmer with your lights on and plug it back in and youll see what I was talking about.

Can u tell me if I can hook 2 folux 288s or 4 of the single boards up to the meanwell driver in picture? And do u think that 8 single boards in all run by two 240 meanwells in all is enough power and light for a 4x4 My other option is to run 3 of those meanwell drivers each on a folux kit(288s) but I would like to take one driver and kit to use for veg. Im planing on buy some more 288s just boards
I’m looking at my other options cause I’m realizing now I should have gone about my purchase a bit differently.
Comments from anyone else that has info is also appreciated hope fully it makes since thanks

 

[ChiefRunningPhist]

Just so you know As long as the dimmer isn’t plugged into the timer than the lights should come back on where you left them every time

a series! then you don't have to worry about dimmer power.. Haha I think I'm the only one that likes the a series over the b, but to each his own, happy smokes

What I'm getting down on RN..

 

[fragileassassin]

Can u tell me if I can hook 2 folux 288s or 4 of the single boards up to the meanwell driver in picture? And do u think that 8 single boards in all run by two 240 meanwells in all is enough power and light for a 4x4 My other option is to run 3 of those meanwell drivers each on a folux kit(288s) but I would like to take one driver and kit to use for veg. Im planing on buy some more 288s just boards
I’m looking at my other options cause I’m realizing now I should have gone about my purchase a bit differently.
Comments from anyone else that has info is also appreciated hope fully it makes since thanks

It will run 2 288 boards in parallel at ~88% 120w each 3 of them will pull 80w and 4 only around 60w.

How many of these drivers and boards do you have now?

 

[fragileassassin]

a series! then you don't have to worry about dimmer power.. Haha I think I'm the only one that likes the a series over the b, but to each his own, happy smokes

What I'm getting down on RN..
View attachment 4258772

the digital ones I use are really cool though, thats their only real downside.
they have a remote with a bunch of presets that i can use to dim them all at once by pushing one button or turn the dials on them and adjust them individually. I have 2 of my 320s on 1 dimmer.

 

[Labrador weed]

It will run 2 288 boards in parallel at ~88% 120w each 3 of them will pull 80w and 4 only around 60w.

How many of these drivers and boards do you have now?

I have 3 kits
So in all 3 drivers and 6 boards (Six boards as in each board is 1 foot by about 7 inches) having a lot of trouble explaining that but basically three kits has three drivers three dimmers and six boards (I got the separate ones that are not attached or else I would say 3 boards hope That makes sense also sorry if my explanation is obvious but for some reason having difficulty explaining. help is appreciated thank you

 

[fragileassassin]

You could probably get away with 4 in your 4x4 for flower, but id use the 3 kits you have for your flower tent if you want big yields.

4 panels and 2 drivers with give you 30w per sqft itll grow pretty well, but really want to aim for 40 if youre trying to push your spaces grow potential.

 

[ChiefRunningPhist]

the digital ones I use are really cool though, thats their only real downside.
they have a remote with a bunch of presets that i can use to dim them all at once by pushing one button or turn the dials on them and adjust them individually. I have 2 of my 320s on 1 dimmer.

They are really nice, and much easier to adjust. The remote is sweet too haha I'm just a cheapskate lol

 

[fragileassassin]

Were in a thread about using chinese boards, I have a pretty good feeling most of us here are.

 

[ChiefRunningPhist]

To get your 288 V2's up to 120w are you guys using 48v CV drivers or 54v CV drivers, I know the MW drivers push a little more, so would the 48v CV driver get to 49.5v+???


Drivers...

QB288 V2...