At least happened to me once from ebay seller :money_mouth_face:
Removed it
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The SST-40s from Aliexpress come on PCBs.
Are those PCBs total junk, just bad or mediocre?
Got a link?
Yeah, those are crap. No copper, just aluminum. Get yourself some noctigons from hank! :+1:
Aluminum isnât a top performer, but isnât bad either. If these are DTP, they should be passable for cheap lightsâŚ.and Kaidomain PCB + LED costs about the same as Aliexpress LED (when buying 10) + Noctigon. Similar DTP, but Aliexpress diodes are factory rejects of random bin and with KD one knows what they buy. There is an intermediate option of using KD PCBs ($1.5/piece) with Aliexpress emitters though.
Wasnât it that seller someone reported to sell fake sst-40? (When buying small amount it was the real sst-40 that came but when he did a bigger order and he got fakes?)
I donât have seen anyone reported the other seller (Shenzhen Great Technology Co.,Ltd) to sell fake sst-40.
I asked them to sell only the LEDs because their PCB is crap and it canât handle the heat when pushed hard.
I got this response:
hi dear friend
I just sell it with pcb .Because some customer brought it back and they donât know how to make it on the pcb.Then they open the dispute .I have no way deal with it .So i just sell it with pcb now
I hope your understanding
Enjoy your day
Jacky
So I checked the store and they sell Xhp70 and xhp35 Hi without their crappy PCB.
So I wrote another message and told them that and what they wrote in the last message donât add up.
Got this reply back:
hi dear firend
I sell the sst-40 led only with pcb .NO bare led for sell .
BR
Jacky
So still little fishyâŚ
Why wonât they just cut the amount of LEDs from the reel and sell? Should be much easier.
Only option I can think of why they would not sell any loose LEDs is because they already put them all on their PCB stars.
But then why not just write that to me instead of making up that story?
I bought 1 of every size PCB with the sst-40 (I think).
Buying from aliexpress is like opening Christmas presents. You never know whatâs in it.
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Well it depends. If youâre going direct drive (where the sst-40 really shines) a copper mcpcb is a must.
Thanks for correction, the right seller is:
https://www.aliexpress.com/store/product/10PCS-100PCS-Luminus-SST-40-10W-LED-1100lm-Cool-White-7000K-instead-of-CREE-XML2-XM/1966839_32819284669.html
With SST-40 driven with FET you can pretty much extrapolate the chart right, so the difference will be higher. Nevertheless, alu will do the job.
If I understand that chart right itâs only the Mcpcb with DTP that will do ok?
The common alu mcpcb will get to hot and fry the led when driven hard?
I donât think those mcpcb stars they sell on aliexpress have DTP.
If I understand that chart right itâs only the Mcpcb with DTP that will do ok?
The common alu mcpcb will get to hot and fry the led when driven hard?I donât think those mcpcb stars they sell on aliexpress have DTP.
Yes^3
Various sst-40 leds tested, lumens are being count with my home made pipe.
NCR18650B protected fully charged battery, will use 30Q soon.
Damn⌠differs 400 lumen between VJ and VK voltage bin at 6.8AâŚ
Do they have same color? (cool white I assume)
I guess you got the VK from aliexpress and someone said they sold factory rejects. It could be because of that to it has less lumens.
Both VK and VJ had same type of Mcpcb?
VK from Ali, reflowed on noctigon.
Still impessive considering price.
Yeah. Really cheap. I have a few on the way but got a message from intl-outdoor that my order was cancelled because the Noctigon XML was out of stock.
So now I have no good Mcpcbâs for themâŚ
Who bought them all ?
Edit: What alternative store are the for buying some good Mcpcbâs with good shipping for EUROPE?
Is there a thread about this that I have missed?
I know LEDDNA got some SinkPAD ones. Anyone else?
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Try Kaidomain.com KD DTP copper MCPCB-s. It need a little mod in soma lights for the screw and wire holes donât match perfectly but it is a minute job.
Yeah I forgot to write the KDlight DTP Mcpcb.
How much does the thickness of the Mcpcb matters with the reflector and the height of the led?
Like KDlight DTP Mcpcb is 1.5mm thick, Noctigon is 1.6mm thick and SinkPAD-ii is 1.65mm thick. (Is there anymore available DTP Mcpcbâs out there?)
Was mostly thinking of throwers.
Can those 0.15mm mess the light up for throwers? (Difference between KDlight and SinkPAD-ii)
Is the standard 1.6mm thickness on the Mcpcb for most of the flashlightâs?
Sorry, little of topicâŚ
Yeah I forgot to write the KDlight DTP Mcpcb.
How much does the thickness of the Mcpcb matters with the reflector and the height of the led?
Like KDlight DTP Mcpcb is 1.5mm thick, Noctigon is 1.6mm thick and SinkPAD-ii is 1.65mm thick. (Is there anymore available DTP Mcpcbâs out there?)
Was mostly thinking of throwers.
Can those 0.15mm mess the light up for throwers? (Difference between KDlight and SinkPAD-ii)Is the standard 1.6mm thickness on the Mcpcb for most of the flashlightâs?
Sorry, little of topicâŚ
If the reflector didnât come loose with thinner MCPCB it doesnât matter. What does matter it is the led centering ring.