New style Samsung LM561C Board
- Thread starter chuckduck
- Start date
Moflow
Well-Known Member
I've 2 of those 800 led boards.
Mine have connectors on them.
I've one a bit of testing with them in this thread......
https://www.rollitup.org/t/diy-fotop-grow-board-280x900x2-0mm-l29-52-xw9-18.960546/
Moflow
Well-Known Member
2 x boards + customs and shipping was £200.
You're getting a bargain.
Is the 1st picture, the one with the added osram $104 a board too?
Also, what driver/drivers are needed to power the lm561C Osram board.
It looks a nice board.
104usd per board isn't bad!
PhenoMenal
Well-Known Member
chucky, beautiful pics!!! 
i especially like the spacing between each LM561C for a bit of extra cooling, ive experienced the Aussie summer with LM561C's and passive cooling isnt enough in summer (especially in this current "taxi rank" config)
i especially like the spacing between each LM561C for a bit of extra cooling, ive experienced the Aussie summer with LM561C's and passive cooling isnt enough in summer (especially in this current "taxi rank" config)+1 on the driver specs for the Osram board
I got 2 of the 800-diode boards as well, though a corner on my boards got slightly bent during shipping. They are pretty sweet boards with super even coverage. Going in a different direction though for my build, if anyone wants them, PM me.
OLD MOTHER SATIVA
Well-Known Member
the only worry i have with mulit multi led boards is that only having one connector to it might have the ones at the end losing some current..maybe extra copper helps a panel not do that..
i do like big panels driven at lower watts needing no heatsinks..like the 6" x 22 "
good to see yuz
sixixix
Well-Known Member
I received my R2T panels yesterday, and wanted to hear what you think.
The forward voltage is stated in the ad as 53V at 4.7A. I know the Vf will drop at lower amperage, but how much?
I connected 4 boards in series to a HLG 480H C2100B, which gave me a measured voltage of 171V over 4 boards, 42.75 pr board.
I also wired 2 boards in series on a HLG 185H C1400A. This gave me a measured voltage of 41V pr board at 1.55A. Dimming the driver down to minimum (50%-ish?) made the voltage drop to 40V.
Is this what I should expect? I thought the forward voltage would be higher at 2.1A, which is why I bought the HGL480H C2100B in the first place
The forward voltage is stated in the ad as 53V at 4.7A. I know the Vf will drop at lower amperage, but how much?
I connected 4 boards in series to a HLG 480H C2100B, which gave me a measured voltage of 171V over 4 boards, 42.75 pr board.
I also wired 2 boards in series on a HLG 185H C1400A. This gave me a measured voltage of 41V pr board at 1.55A. Dimming the driver down to minimum (50%-ish?) made the voltage drop to 40V.
Is this what I should expect? I thought the forward voltage would be higher at 2.1A, which is why I bought the HGL480H C2100B in the first place
Cookie-Monster
Well-Known Member
I found another company, https://www.foluxsolutions.com . Seems they're having a 30% off 4/20 sale until 4/25? I grabbed one of their 240 kits.
ANC
Well-Known Member
Something seems off.I received my R2T panels yesterday, and wanted to hear what you think.
The forward voltage is stated in the ad as 53V at 4.7A. I know the Vf will drop at lower amperage, but how much?
I connected 4 boards in series to a HLG 480H C2100B, which gave me a measured voltage of 171V over 4 boards, 42.75 pr board.
I also wired 2 boards in series on a HLG 185H C1400A. This gave me a measured voltage of 41V pr board at 1.55A. Dimming the driver down to minimum (50%-ish?) made the voltage drop to 40V.
Is this what I should expect? I thought the forward voltage would be higher at 2.1A, which is why I bought the HGL480H C2100B in the first place
You should be pulling circa 45.8 to 46V ish at that current.
know of any location to buy them in the EU? those boards
They will probably ship to the EU directly if you reach out to them.
I’ve bought boards from Atreum Lighting (www.atreumlighting.com) and had good experiences. I know they ship internationally as well, they may be able to hook you up.
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Might be a silly question, but have you checked that your voltage adjustment on your drivers isn't turned down? The forward voltages do seem low...I received my R2T panels yesterday, and wanted to hear what you think.
The forward voltage is stated in the ad as 53V at 4.7A. I know the Vf will drop at lower amperage, but how much?
I connected 4 boards in series to a HLG 480H C2100B, which gave me a measured voltage of 171V over 4 boards, 42.75 pr board.
I also wired 2 boards in series on a HLG 185H C1400A. This gave me a measured voltage of 41V pr board at 1.55A. Dimming the driver down to minimum (50%-ish?) made the voltage drop to 40V.
Is this what I should expect? I thought the forward voltage would be higher at 2.1A, which is why I bought the HGL480H C2100B in the first place
Looks ok....company out of Seattle... $49 on QB288 vs. $65 HLG
Black Thumb
Well-Known Member
So these ebay boards
https://www.ebay.com/itm/Horticultural-Lighting-288pcs-LED-Board-3000K-Full-Spectrum-Quantum-LM561C-S6/192509696799?hash=item2cd278db1f:g:nbwAAOSwM91aZYsY
Is this exactly the same as the QB288 QUANTUM BOARD from https://horticulturelightinggroup.com/collections/all/products/qb288-quantum-board?variant=5508760141851
Just without the Brand stamped onto it ?
They are constantly sold out and i cannot finish my projects, would love to have another source.
Anyways are these the same product ?
https://www.ebay.com/itm/Horticultural-Lighting-288pcs-LED-Board-3000K-Full-Spectrum-Quantum-LM561C-S6/192509696799?hash=item2cd278db1f:g:nbwAAOSwM91aZYsY
Is this exactly the same as the QB288 QUANTUM BOARD from https://horticulturelightinggroup.com/collections/all/products/qb288-quantum-board?variant=5508760141851
Just without the Brand stamped onto it ?
They are constantly sold out and i cannot finish my projects, would love to have another source.
Anyways are these the same product ?
Viceman666
Well-Known Member
The most we can say is they are similar.. the same maybe maybe not depends on which diode they use... but most likely they got them built off china on alibaba (you can order some yourself they sell for 25$ each more or less + shipping) as such you dont know for sure they are lm561c s6 which is the diode use in real quantum board
Black Thumb
Well-Known Member
$25 each ? from alibaba or on ebay ? Im seeing about $50 each on ebay
Viceman666
Well-Known Member
Alibaba.. all im saying is they probably purchased 100+ At less than 25$ each of those board from alibaba to get a volume discount and are reseling at 50$ on ebay.. thats my best bet.. yes you pay a little more from HLG but it comes with warranty and guarantee to get what you pay for
Humple
Well-Known Member
You can be quite certain they are not the same as HLG's boards. They could be very similar, but they won't be identical. Watch out for rip-offs though - a lot of these QB copies are of lower quality. That doesn't mean they won't work for you, but just be aware.