Aolelon
Well-Known Member
Yes lol.. Stick one tester on one side of the diode, stick the other on the other side. If you test more than 2.9 its not a lm561c diode
New style Samsung LM561C Board
- Thread starter chuckduck
- Start date
Aolelon
Well-Known Member
You can use the Samsung calculator here to figure it out. http://www.samsung.com/led/support/tools/led-component-calculator/
Freakish
Member
Ya, looked more into it. I was hoping I could distinguish between lm561c s6, and 5 with a multimeter, but the only way you can tell apparently is between the flux which I doubt I have the means to test.
Voltage could tell me if it's not a lm561c, but it can't tell me if it is a lm561c since a lot of LEDs have bins that overlap with the lm561c. That said based on appearance I'm fairly certain I got lm561Cs it's just a matter of if I can prove whether they're s6, or 5. Purely going off looks though they're S5.
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Led C is a lm561B which shows as a 5630 in Samsung's data sheet
Freakish
Member
I agree. If I got S5s I'll be content with that, I'm sure it'll grow great weed regardless, but I'll want some compensation from the sell since I paid for S6s.We know for sure the dot is much more apparent on lm561b and b+ thats a fact however for the phosphor color you cant rely on that as it doesnt mean anything really BIN are rated by luminosity not by color so they could be discrepency so yes looks like the board has lm561c now which bin.. I think I saw somewhere we could ruled out s4 as they were produced for a specific market if im not mistaken.. so either s5 or s6 but at this point ... the truth is 50% price for AT MOST 10-15% difference between s5 and s6.. for value it doesnt get much better than that imo
I don't think the phosphor powder is affecting the bin, my theory is that the visability of the dot could be an indication though. I mean, there has to be some sort of physical defect that causes these LEDs to be binned differently, and maybe that's it.
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Any chance I can get a close up of one of your LEDs?
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Viceman666
Well-Known Member
The "visible black dot" is not from different bin but different diodes (b or b+) C still have that dot its just not as apparent as the B or b+.. also looking stricly at voltage could be misleading too, different temp, current, etc can impact the voltage and as mentionned in a previous post there is some overlap with different diodes available at different voltage even the s6 bin is available in different voltage (AY, AZ, A1 - according to the samsung calculator)
You say you want "compensation" because you paid for "S6" well no.. you paid to get a pcb board with LED diodes on it from a country who is known to produce in mass with poor business practices.. your "compensation" is in the lower price you pay compared to the retail price of such boards. If I knew the boards I bought were s5 The truth is I would have still bought them. To me its not as bad as th viparspectra or mars hydro claiming big wattage but deliver short in actual power and efficiency. From s5 to s6 lm561c its no big deal IMO..
Cost me 430$usd for 2 full kits(4boards, heatsink, wires, drivers, 2 days shipping, customs, etc) while from HLG it would have been 600usd+shipping+ custom on the full price.. I am in Canada.. and who knows if my boards from china are not actual S6 given there is no way to know unless you do extensive testing which most of us are not equipped to do its up in the air if its one or the other but regardless they are still very efficient, much better than any blurple or HPS and in terms of value represent the best deal on LED in the market by a big margin for most people around the world.. and for the guy from EU - china will lower the value of your package to whatever you want so in terms of custom vat and all the rest its probably not even worth considering but obviously im not in EU so I dont know all the specifics either..
Yes HLG provide an amazing customer service and guarantees on their product but to be honest how many people had failure on their board for the thousands that were sold to this date? Not much.. there is a few here and there but thats about it
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godofgrow
Member
Nah, you have to show the customs proof of payment and they cross check it with the website you declare you bought it from. However, I did order them anyway. Ordered 2x260W kits.YOLO. I figured whatever LEDs they used, they're still better than my 277W Meizhi LED. I'm planning on selling one kit to recoup a bit of the cost of shipping.
Freakish
Member
What I'm seeing is a difference between the dot across lm561Cs. I ordered S6s, and 5s from digikey, and the dot is noticibly darker on the 5s. I'm not saying this means all 5s have a darker dot, just that mine do, and it could potentially be a sign of S5 vs a S6. Or it could be completely meaningless.
I get what you're saying, but Chinese business practices aside I have an agreement with the seller that I'm paying them x dollars for a specific product. If they made a mistake, and I got the wrong LEDs I just want things made right.
I agree that the difference between a S6, and 5 isn't critical, but if I got a lower quality led a price adjustment would be fair.
Ya mine all came to $637.54 CAD from Alibaba. From HLG it would have been $980.35 CAD. Even if they're S5s it'll take me approximately 19 years of continuous growing for the electrical cost of a 5% loss in efficiency to equalize with the $
342.81 price difference between the boards.
If you have the money I absolutely would buy from HLG, but otherwise Alibaba is a great option to consider imo.
legalcanada
Well-Known Member
what color spectrum? i think color spectrum will also affect visibility of the dot a little bit
Freakish
Member
I've got lm561C S6s, and 5s in 3500k, and 3000k. In both spectrums the S6s don't have a visible dot while the S5s do.
legalcanada
Well-Known Member
i think it's where the electrostatic discharge (ESD) protection device is, but not 100% on that.
my boards from miejiu look more similar to S5 but idc.. i paid something like $30 for each 304pc board incl/ heatsink. i ordered same color spectrum + diode count/voltage as my HLG qb304s and in 1week when i'm done flowering i'll compare output (in lux only... no par meter)
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Viceman666
Well-Known Member
Cant wait to see -
Meijiu price list from a recent message from them :
1. Board 304: USD25.35
2. single heatsink: USD10.48
3. 2 board heatsink: USD18.22
4. driver HLG-240H-C2100B: USD54.69
5. dimmer: USD10.65
Obviously expect higher than normal shipping charges but it gives everyone an idea at least
legalcanada
Well-Known Member
i ordered my driver in canada (arrow), i got 2x 304 and 2x single heatsink and i think it was ~$100 after shipping then $28 CAD for import+DHL fees and $100 for driver (HLG-320-1400A).. after everything it was about $0.65-$0.70 per watt
Purpsmagurps
Well-Known Member
Flying saucers!!!!
Aolelon
Well-Known Member
Cant really see and tell for sure
nice name lol
ildiocane
Member
Aolelon
Well-Known Member
Possibly if you can take a better picture of the diodesU need a better photo or is just impossible to check?
Thank u, u too