Airwalker16
Well-Known Member
So you're just going to have some 18 extra strips left over is all...
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Alibaba lm561c orders legit?
- Thread starter jake.snake83
- Start date
Rocket Soul
Well-Known Member
Try this thread: https://www.rollitup.org/t/the-chinese-quantum-board-knock-off-builds.971560/
I have no experience with Mufue, but ive been satisfied with what i got from Meijiu/Rita. R2T seems like another decent seller but i havent tried them myself.
Some sellers will not give you top bin even if they say it is. And there really isnt anyway around that issue except for very costly spheretesting. But the deals ive been getting where so good i feel they were more than worth it. I just buy some extra boards and run it all soft.
It kinda depends on if youre in the US/access to HLG. I pay about a third of the price i would pay for HLG around here per diode. If i could get qbs domestically it would change this equation and id probably go with with HLG
Lm561C vrs B vrs B+: there are ways of discerning between C and B on a visual basis, the die inside the chip is bigger in C version. B+ is identic i think. But no Alibaba accepted way of determining bin except for sphere tests.
mathewscott
Active Member
Lately this has turned almost unpleasant. Because of the snobs.
ApfelStrudel
Well-Known Member
Well maybe I'll just get another driver or three
Randomblame
Well-Known Member
I thing you've missed something! 300v travels the skin easily and going thru your body it can easily kill you! Insulated with one finger it would only cause an "ouch" but that's not the case when you're grounded. DC voltage is'nt harmless at all it depends on the situation.
Yeah, ~4v is probably enough headroom even when cold start at 20°C ambient. The maximum current of a 1050mA Meanwell is probably between 1100 and 1150mA (up to 8% usually according to the test reports) and strip voltage would be a little higher like 23,16v, maybe 23,3v or so but it's probably still not high enough to trigger the overvoltage protection.(blinking, shut off & retry)
ApfelStrudel
Well-Known Member
Actually 48V can be fatal for a human being. Fuck it 9V battery will kill you too if you try to swallow it and it gets stuck in your throat.
I've been standing next to my coworker when we were reparing a laser cutter and that chump grabbed a live 30kV terminal and hit the grounded fence with his back at the same time. Some skin came off his back and it knocked him out alright.
You're right, it depends on the situation and like I mentioned before, we're not working barefoot in a room with grounded floor with water up to our knees. I'll hold that output of the driver all day long even at 300V. Once again, this is DC.
C series drivers aren't gonna blink in this situation, they're gonna fall out of regulation at max voltage and deliver demanded current. Constant voltage drivers are gonna blink when current demand at max voltage will still be larger than what the driver can deliver.
Example: 320 lm561c board wired 8s40p (24V nominal) won't light up on a LPV 100-24 because the driver cannot deliver the current the board demands at 24V as the driver regulates the voltage and not the current. This same driver will however run 3 96 boards in parallel. LPV 60-24 won't run 4 of those 96 board, neither will run 3 but will fire up 2 boards in parallel .
Another example with LPC 150-2100:
Driving 2 CXB3070 will result in driver putting out only 1900mA where with CXB3590 it will deliver full 2100mA. Vf of 3070 is not much higher than Vf of 3590 but just enough for the 72V driver to fall out of regulation (see datasheets)
My HLG-120H-C1050B runs 6 of those boards at 139V @1050mA and drops occasionally to 138V/1030mA. Might be temps but might also be the dimm pot.
139V/6=23.1666666V
1050mA/12=87.5mA
This would also tell us what chips are used on those boards if we have a closer look at Samsung datasheets for lm561 chips. If any one wants to bother, personally I really dont care at those prices.
You guys really need to start understanding how certain type of drivers work and the logic behind CV, CC and CV/CC drivers
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Or a sane forum where people do research instead of make a repeat thread for the 50th time.
JavaCo
Well-Known Member
Pretty slow going @ this site but not a lot of trolls handing out false info like in this forum. https://ledgardener.com
Randomblame
Well-Known Member
Okay, I've mixed it up with the CV/CC drivers. But jt should work with 13 strips is series even with up to 1150mA.
But I've recognized another problem with long series connections.
I have an HLG-240H-C1050B which I have used with 6 Vero29gen6's and maximum was ~245w with 262w at the wall.
Later I wanted to use the same driver but for 20 2ft F-strips connected in a 10s2p series-parallel circuit.
Because of the maximum current of ~1130mA I've used 565mA to calculate the strips voltage( Sammy calculator and datasheet). According to the datasheet the voltage at 565mA should be around 22-22,2v(with lower case temps in mind, nominal kjs 23v@1120mA).
So normally 222v with 10 in series at 565mA but I don't got the calculated output with open dimmer wires. Instead of ~250w net and ~265 at the wall I only got ~217w at the wall. So don't know exactly whats going on here but maybe its because of the tiny connectors. Someone told me the strips would have a 50v limit but I've not found that mentioned in the datasheet. At least its not mentioned in C, H, Q or H-influx datasheets.
I've used the same 1,5mm² single core wire I've used for my other lights and it's the thickest diameter fitting inside the connectors. All connections are double checked three times and the driver was placed in an ventilated housing directly on the backside of the fixture. So wires between driver and first/last strip were also pretty short.
217 instead of 265w at the wall is a huge difference and even 20 of this tiny connectors in series should not cause such a big difference(I believe the are rated with 300v).
Would not try the driver anyway to compensate a certain voltage droop.. in a series circuit?
I've also tested the voltage of each parallel string, changed the strips back and forth and ended up with a difference below 0,1v. So one string has 222 and the other around 221,9v ... That's also not enough to cause such a big loss.
Can you say whats causing this issue?
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whytewidow
Well-Known Member
I have solskins they say they can hold up to 2.5a at 24v they can not. I'm pushing 6 of them 96 diode lm561c s6 diodes supposedly. On a hlg-240h-24a and I have very good cooling. And they get pretty warm wide open. I run them at 1667mA normally. And they stay cool.
whytewidow
Well-Known Member
This applestruddle or whatever his retarded name is dude is an idiot. Saying dc voltage wont hurt you. And he can hold 300+ volts in his bare hands all day well you go right ahead please. Bc it's called survival of the fittest. Hopefully she does her thing. You stupid fool. I'd bet you a complete new light owr every grow area says you cant hold a 320 cc driver. This is why I had this idiot blocked to begin with. It's people like this that get other people killed. Hopefully nature takes this one out before he gets someone hurt.
dandyrandy
Well-Known Member
jake.snake83
Well-Known Member
Nobody is going to wire a driver to their testicle sac because of this. That is not survival of the fittest in any form. Plus it would be highly inefficient from a corporate perspective...
Here's a link about dangers for anyone just in case. 0.1 amps can fry someone's brain.
https://www.scienceabc.com/humans/how-many-volts-amps-kill-you-human.html
whytewidow
Well-Known Member
Dude first off I'm a master electrician and have been for almost 20 years. I know what can kill you and what can not. Secondly wtf no said shit about hooking anything to their balls. You posted earlier on this thread about bullshit posts. And here you are being fukn retarded. Just go back where ever you came from.
jake.snake83
Well-Known Member
Jesus Christ Sir I know a few electricians and they did not have an attitude problem such as yours. I am sorry you need to try to upset other people on an internet forum; whatever is wrong with you I hope you find the help you need. You must have smoked some bad granola. You obviously need to understand what the "internet" is as well, and that people cannot "go to and from" where they "came from."
mathewscott
Active Member
Amen my brother.I used to like this site but now it's all about mine's better than yours and I spent more money on my new shit and your shit sucks and you are a fool if it is from china and all that other bullshit. Look at the tag on your fucking high-priced branded named mean well rip off shit made in China! Whose the fool
mathewscott
Active Member
Oh and by the way I checked obscenitys are allowed f%=k you led snobs.
mathewscott
Active Member
so stupid
Chip Green
Well-Known Member
My post beginning to make sense now?????
mathewscott
Active Member
Check obscenities fuck you!