MC-E is up at DX
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nwbrewer
Newly Enlightened
Looks like parallel to me, just like a P7. Wonder what bin, since it doesn't say.
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Pig_Chaser
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The driving voltage says parallel but the driving current says series 
i'd assume the desciption is correct.
370 lumens puts it somewhere in the cool white range.
Edit: It says WG Bin
i'd assume the desciption is correct.370 lumens puts it somewhere in the cool white range.
Edit: It says WG Bin
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Given that the pictures are taken by DX themselves, I'd go by the picture rather than the description. If you look at the traces on the board, they definitely show series connections (IIRC, all cathodes are on one side and all anodes are on the other -- thus, parallel would just have all contacts on one side connected to each other). So unless they're shipping something different from what they took a picture of, it'll be in series.
ifor powell
Enlightened
Or maybe its 2S/2P in which case I may get one...
Ifor
Ifor
chimo
Flashlight Enthusiast
If you check the Q&A under the item description, there are links to drawings of both boards (ser/par'll). The board pictured is the serial one. I ordered a couple to play with.
Hi,
What do you think of the MCPCB?
This guys shows that a crappy MCPCB can be terrible for the heat transfer from the LED chip which means shorter lifespan and less light.
The links to the schematics for the MCPCBs (under the Q&A for the MC-E on the DX site) indicates that CREE has made/designed the MCPCBs themselves. This should be a good sign though.
Cheers,
Anders
What do you think of the MCPCB?
This guys shows that a crappy MCPCB can be terrible for the heat transfer from the LED chip which means shorter lifespan and less light.
The links to the schematics for the MCPCBs (under the Q&A for the MC-E on the DX site) indicates that CREE has made/designed the MCPCBs themselves. This should be a good sign though.
Cheers,
Anders
It looks like quality but I don't know that that is a Cree star. In that PDF of the star from Cree it says the pads are to be gold plated. I don't see that in the DX pictures.
I'm pretty sure thats not a Cree star.At the very least its not the star Cree has shown in the past for the MC-E.
In the Cree star,the dies are individually addressable,so any configuration is possible.There are eight solder pads on the outer edges of the star,each corresponding to one die,of course.
-Michael
In the Cree star,the dies are individually addressable,so any configuration is possible.There are eight solder pads on the outer edges of the star,each corresponding to one die,of course.
-Michael
jmodic
Newly Enlightened
Not quite so. Cree has two type of stars for MC-E and both are documented on their website. The one you are refering to can be seen here: http://www.cree.com/XLampModels/XLamp MC-E Star PCB Individual.pdf , while the one that is prewired in 4S configuration (and which apparently is the same as the one on the DX photos) is here: http://www.cree.com/XLampModels/XLamp MC-E Star PCB Series.pdf
This 4S one only got 4 solder pads.
HTH
I thought there would be other star configurations coming from Cree,thats the reason my post was worded as it was.
I'm still not sure its a Cree star.
1.The description says its wired 4P,not 4S.
2.There are no markings on the board with Cree's logo or polarity,except with a Sharpie.The Cree board has those markings in the datasheet.
3.The extension for the thermo-couple is on the wrong side.Unless the emitter was installed backwards of the datasheet.
4.The Cree star also has gold plating on the pads.
-Michael
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longleg
Newly Enlightened
Can anyone give a 100% confirmation of the configuration of the DX MC-E?
chimo
Flashlight Enthusiast
You probably have to wait until they start shipping - until then, it's just speculation.
longleg
Newly Enlightened
I hope these make the trip safely. I will be looking for the results here to see how they survive the trip packaged badly.
LEDs should be packaged in something that can take some amount of crushing while keeping its contents safe. In he past ordering LEDs from Kai and the other, they send them with just some bubble wrap. Hopefully this practice has changed.
LEDs should be packaged in something that can take some amount of crushing while keeping its contents safe. In he past ordering LEDs from Kai and the other, they send them with just some bubble wrap. Hopefully this practice has changed.
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