LM561C S6 build question

X

xocoyotzin

Member
Ive been reading up on the forum and i think i got things right here before i spend any money.
im planing on using:
1 x HLG-320H-C1400A
9 x 78 diode (LM561C) strips (3.6 feet length)
This driver has a 229V max and each led has a 2.9 forward voltage, so 78 x 2.9 = 226.2 which is pretty close to the max and should put me at about 316 watts at the wall when 9 strips are run in parallel. each strip would be running pretty close to 150mA, which as i understood was the sweet spot for this diode.
1400 / 9 = 155

Are mi calculations correct?
im pretty new to all of this so it wouldnt surpise me if i was completely wrong.
thanks in advance
 
Last edited:
nc208

nc208

Well-Known Member
That doesn't seem right. Do you have a link to these strips? Your voltage seems way too high for so few diodes. Alot of these strips are set up in a series/parallel connection. My strips for example are a 8s12p for 96 diodes per strip and total voltage is around 24v a strip.
 
X

xocoyotzin

Member
i cant post links but its a custom pcb anyway so i wouldnt have a link for it, so i did the voltage part wrong? i thought diodes in the strips where in series and the strips themselves where in parallel.
sorry if this is basic stuff, im still trying to learn.
so 78s9p is wrong?
 
nc208

nc208

Well-Known Member
Well I think you should read up on the strips more. Why are you trying to design from scratch instead of buying a few quantum Boards?
 
X

xocoyotzin

Member
i saw a couple in stock in amazon yesterday dude, maybe u can still grab them? its the 288 model tho, u can follow the link in their page it says out of stock but if u click the amazon link they have some
 
X

xocoyotzin

Member
thanks ill look into them, i was also thinking about the flexible strips u can get by the meter, if i want to light a 2x4 area with 300 watts evenly as possible what would be your recommended setup, if i wanted to run the diodes at 150 mA that is
the strips have 72 leds/ meter
thanks
 
Randomblame

Randomblame

Well-Known Member
I think your strips looks like this one below, 100cm, 70 LM561cc/S6 in series, ~200-210vf, max. 200mA with proper cooling(c-channel's). If they look and built similar your setup will work.

Screenshot_20171124-111325.png
 
V

VegasWinner

Well-Known Member
I thin k you are on he right track. I would not listen to folks telling you to buy QB';s instead of doing you. That is their desire. You have a handle on what you are doing. Your math looks fine to me.
peace
 
V

VegasWinner

Well-Known Member
For info:
1..There are three bins of he S6 diode. 2.7, 2.8, and 2.9 the last two are common in Shenzhen 2.8./2.9. S6 2.7 bin is ONLY available in the USA. Ask your vendor which S6 Bin they are using for clarity of design.
2. running amps for Samsung LM561C max lumens is 88mA. The closest with strip you can get will be 90-100ma on average depending on your driver selected. Use 1400/88 = 15.9. So you could go with up to 15 parallel strings of 78 diodes each to get 190lm/w. or you can go less with 14 parallel strings to get to 100ma per diode. at 10 parallel strings you can get 150mA drive current. So you can start with fewer strips and add more as you have money or go with 14 parallel strips for 78 x 14 = 1092 diodes at 180lm/w at 300w. max benefit
 
ANC

ANC

Well-Known Member
I'm going to advise you steer away from the 5k ones, the further you go from 3k the more node space increases... unless you like growing leggy weed.
 
nc208

nc208

Well-Known Member
VegasWinner said:
I thin k you are on he right track. I would not listen to folks telling you to buy QB';s instead of doing you. That is their desire. You have a handle on what you are doing. Your math looks fine to me.
peace
Click to expand...
Why so you can try to sell him your copycat design?
 
Randomblame

Randomblame

Well-Known Member
5k has a lot more blue so tighter nodes with 5k.
But to be fair, 3k LED light can also be used in veg with good results because 10% blue is enough for tight nodes..
 
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