Re: Genuine Chinese Sellers
Posted: Wed Oct 03, 2018 10:32 pm
No, a sphere test isn't needed. You can quite readily establish the facts without one. There is zero confusing the lm561b and c, I'll upload the info later
A friendly LED grow light community.
https://ledgardener.com/forum/
Here we go man, here's a screencap I took from a Samsung presentation video on the topic (I'll put the youtube link at the end), You can see the size of the emitter in a C diode vs a B, it's noticeably bigger, and can be seen with the naked eye:sdfoster22 wrote: ↑Wed Oct 03, 2018 10:29 pmYes a sphere test is what is needed. The b+ diodes and lower bins perform great as well. You just don't get the same Effeciency.
there is the Samsung online calculatorCrazyFool wrote: ↑Wed Oct 10, 2018 10:16 pmI can easily desolder an led and test it with a voltmeter
Any noob friendly step by step instructions any where?
So basically we run the diode at voltage x and if the current across the diode is y then we know its genuine?
What about overlap? Surely there'll be many diodes/brands/generations that run around similar parameters?
Where can I find a chart that compares current vs voltage the lm301b/lm561c data sheets only have 1 chart. Surely there should be a separate graph for s4, s5,s6 etc?
Also, A1 AY and AZ aren't separate products? Is it just a voltage range? Every LED can be run as either a1 ay or az?
Thanks again
So there's no way of knowing exactly which voltage bin you're getting, you're only choice is XA and XK?Futuregrow wrote: ↑Fri Oct 12, 2018 11:03 amYeah they're sold by voltage bin. Check the attached pic:
Yeah, tbh there's plenty of microscopic photos people have posted of genuine s5/6 diodes.