New style Samsung LM561C Board

Randomblame

Randomblame

Well-Known Member
Green.Lady said:
Its the same board, depends on the light and the zoom, but they dont look genuine to mw
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Green.Lady said:
@Theirongrow this are the boards from ebay. Ledgrowsolutions . Maybe they bought from jeff too, i spoke to jeff 2 day ago and he said that at this moment he dont have lm561c only b and b+ at least he was honest this time lolol
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A few days ago, Jeff said it was just a mistake that LM561b was used. Now all at once LM561c are no longer available. Why does he not buy new ones, instead just taking worse ones? He's really an arshole and a liar!

Also for Ledgrowsolutions it's really cheeky to say it's S6/AZ and then it's not even a LM561c.
To ask for 75€, is also a joke because that's 88,50$ currently.
The item/seller should be reported to e3ay, so that the offer can be terminated or at least overworked with hint that LM561b is used.
I think the seller maybe gets also cheated by Jeff, so it's not even his fault. Would like to know what he has to pay for the boards and if he knows he has no LM561c on his boards?
At least you have E3ays Buyer Protection and can return the boards and get your money back!
 
ANC

ANC

Well-Known Member
The Samsung Fs are S7 I believe. I can go read a long piece again to check, but I'm gonna go with that number.

THey'd be stupid to release loose reels of the good shit this early.
 
chuckduck

chuckduck

Well-Known Member
Randomblame said:
A few days ago, Jeff said it was just a mistake that LM561b was used. Now all at once LM561c are no longer available. Why does he not buy new ones, instead just taking worse ones? He's really an arshole and a liar!
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I received mine about a week ago and are LM561C. As least he said they were. Haven't really looked closely yet. They better be. These are the reduced price boards ($20) he sent because he "made a mistake" with the first set. These are the boards I said were going to get tested and possibly buy in bulk if the tests came back positive. These were the boards that if they tested positive for LM561C that would get this thread taken down. LOL.
 
ttystikk

ttystikk

Well-Known Member
Randomblame said:
A few days ago, Jeff said it was just a mistake that LM561b was used. Now all at once LM561c are no longer available. Why does he not buy new ones, instead just taking worse ones? He's really an arshole and a liar!

Also for Ledgrowsolutions it's really cheeky to say it's S6/AZ and then it's not even a LM561c.
To ask for 75€, is also a joke because that's 88,50$ currently.
The item/seller should be reported to e3ay, so that the offer can be terminated or at least overworked with hint that LM561b is used.
I think the seller maybe gets also cheated by Jeff, so it's not even his fault. Would like to know what he has to pay for the boards and if he knows he has no LM561c on his boards?
At least you have E3ays Buyer Protection and can return the boards and get your money back!
Click to expand...
HLG doesn't seem to be having any trouble getting LM561C chips. Maybe that's why they charge a fair price for their boards; because the customer is actually getting the quality they're paying for!
 
Randomblame

Randomblame

Well-Known Member
ANC said:
The Samsung Fs are S7 I believe. I can go read a long piece again to check, but I'm gonna go with that number.

THey'd be stupid to release loose reels of the good shit this early.
Click to expand...

The F-Series use S6 bin, S7 is only available in CRI70. Top bin for CRI80 is S6 and for CRI90 it's S3. No need to read the long piece again...
 
Randomblame

Randomblame

Well-Known Member
Moflow said:
Thanks Randomblame, Nice find , I'll investigate further but I should have been more specific.
It was the @PSUAGRO. "Bridgelux" 1750K cobs I'm after. :D
Negotiating the digikey site is a complete pain in the aris for me lol
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Hi Mo!
Got the pinkish 9w full spectrum tubes yesterday, wish all my ordered parts would arrive that fast!

Have disassembled the first one immediately and have taken a few photos.
They are a bit different than I thought, because instead of 8s6p the PCBs are designed for 24s2p. That means they need aound 72v and get 120mA from the internal driver.
Besides, they are brighter than I thought. In fact, compared to a single 3000°k SMD7020 strip (10w) they are brighter.
Most datasheets for SMD2835 indicates 120-150mA as maximum current, that means one could overdrive them and operate the strips with 240-300mA, that would be theoretically 17-22w if one want.
I'll mix a few of them with some F-strips and build a small lamp first(with HLG-60 or 80), but I also want to get some CRI90 strips with LM561c/S3 bin to see what will ultimately give better results.
 

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Moflow

Moflow

Well-Known Member
Randomblame said:
Hi Mo!
Got the pinkish 9w full spectrum tubes yesterday, wish all my ordered parts would arrive that fast!

Have disassembled the first one immediately and have taken a few photos.
They are a bit different than I thought, because instead of 8s6p the PCBs are designed for 24s2p. That means they need aound 72v and get 120mA from the internal driver.
Besides, they are brighter than I thought. In fact, compared to a single 3000°k SMD7020 strip (10w) they are brighter.
Most datasheets for SMD2835 indicates 120-150mA as maximum current, that means one could overdrive them and operate the strips with 240-300mA, that would be theoretically 17-22w if one want.
I'll mix a few of them with some F-strips and build a small lamp first(with HLG-60 or 80), but I also want to get some CRI90 strips with LM561c/S3 bin to see what will ultimately give better results.
Click to expand...
Nice one Randomblame!
Is there an SPD chart for them?
What's the most "efficient " way to run those?
I've been keeping an eye on digikey for 2ft double strips or stripes if your that way inclined lol but there's only 4 items in my flavour, 3000k.
I'd like to get 2700k too.
I received 2 x 10 watt Epileds 385nm UVB frae China so I'll get them up n running for my next batch :D
My plants under the Growgreen boards 3500k/5000k are looking more frosty than under the CXBs 3500k or quantum 3000k with a different bud structure and they look as though they are finished while the CXBs n qbs are still fattening up.
The gg boards spectrum is maybe closer to CMH ?
You do a great job for the DIY community Random, long may it continue!
:cool:
 
ANC

ANC

Well-Known Member
I got a few pieces of Aluminium channel, enough to put 3 boards on, will try to find more of the same at another branch of the outlet tomorrow.
 
Randomblame

Randomblame

Well-Known Member
Moflow said:
Nice one Randomblame!
Is there an SPD chart for them?
What's the most "efficient " way to run those?
I've been keeping an eye on digikey for 2ft double strips or stripes if your that way inclined lol but there's only 4 items in my flavour, 3000k.
I'd like to get 2700k too.
I received 2 x 10 watt Epileds 385nm UVB frae China so I'll get them up n running for my next batch :D
My plants under the Growgreen boards 3500k/5000k are looking more frosty than under the CXBs 3500k or quantum 3000k with a different bud structure and they look as though they are finished while the CXBs n qbs are still fattening up.
The gg boards spectrum is maybe closer to CMH ?
You do a great job for the DIY community Random, long may it continue!
:cool:
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No, I've not found a datasheet or spd chart for now, but I will ask the seller. Maybe we're lucky..?!
I would mean between 60 and 80mA for an efficient use and 100-120mA to get the most out of them without damage.
I've also seen more frost with higher kelvins but no shortrer flowering period. But I've not mixed them with lower kelvins which could be the reason yours riepening faster. And yes, the spectrum seems closer to CMH and if you add some UVA you get maybe similar results, incl. a higher thc content.
I will add an UVB tube to get more frost and it adds a lot of blue to the spectrum which should have also an inpact on plant structure and flowers
Too bad that F-strips does not exist in CRI90, I would mix 4000 or 5000°k/CRI80 and 3000°k/CRI90.
 
OLD MOTHER SATIVA

OLD MOTHER SATIVA

Well-Known Member
ttystikk said:
HLG doesn't seem to be having any trouble getting LM561C chips. Maybe that's why they charge a fair price for their boards; because the customer is actually getting the quality they're paying for!
Click to expand...
sorry dude....LM561C s6......they are not really any more expensive
...next ?
 
Moflow

Moflow

Well-Known Member
Randomblame said:
No, I've not found a datasheet or spd chart for now, but I will ask the seller. Maybe we're lucky..?!
I would mean between 60 and 80mA for an efficient use and 100-120mA to get the most out of them without damage.
I've also seen more frost with higher kelvins but no shortrer flowering period. But I've not mixed them with lower kelvins which could be the reason yours riepening faster. And yes, the spectrum seems closer to CMH and if you add some UVA you get maybe similar results, incl. a higher thc content.
I will add an UVB tube to get more frost and it adds a lot of blue to the spectrum which should have also an inpact on plant structure and flowers
Too bad that F-strips does not exist in CRI90, I would mix 4000 or 5000°k/CRI80 and 3000°k/CRI90.
Click to expand...
It's hard to judge what exactly goes on in my main flowering area with all the differing spectrums but I like it..... lol
 
ANC

ANC

Well-Known Member
ANC

ANC

Well-Known Member
OK, I am just reporting what I read with the link, I understand it is hearsay, but I am not making stuff up.
 
Randomblame

Randomblame

Well-Known Member
It realy easy to prove it's S6 bin when you use Samsungs LED calculator.
For example, the 180lm/w for a 3000°k H-series strip(80mA per diode) match perfectly with S6/A1 bin @80mA. Same result with F-strip(124mA per diode) and 168lm/w. The same is true for the other spectrums.

Below is the datasheet of LM561c and if you go thru the binnings you'll see there are only S6 bins in CRI80.
 

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