YUPARD Mod: 9 XML @ 3P3S with FET Driver (3S 26650) UPDATE: 4.3A per emitter! This is Insane ! (Post #37)

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Ouchyfoot
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YUPARD Mod: 9 XML @ 3P3S with FET Driver (3S 26650) UPDATE: 4.3A per emitter! This is Insane ! (Post #37)

 

                          YUPARD 9 x XM-L

 

 

 

When I started this mod, my heart wasn't really in it. Ive been playing with KD beast drivers, and planned to put one in this this light. By the time I got to this mod, I'd realized that they only have a life span of twenty minutes, so I was kind of down.

Then I thought about the FET drivers I got from RMM. I'd never tried them, and can't say I really understood them. My mind was on one type of modding, and I'm not smart enough to learn about two things at the same time.

I wasn't sure if it would be worth my bother to try it with a 3P3S setup with nine emitters, so I talked to Richard. He assured me it would work, but I'd need to do a Zener mod. That part I still don't understand, but he assured me it was necessary. Since I'm new to all this, I just performed the Zener mod on the FET driver with blind faith.

I've been doing a lot of multi emitter lights lately, and it gets expensive swapping in XM-L2s, so I kept the original XMLs. I did reflow them onto Sinkpads though.

 

I did the wiring with 26AWG 9 strand silver teflon wire. I really like this stuff for multi emitter lights because of its very low profile. The bottom of this reflector is flat, so low profile is nessesary.

 

I stripped the stock driver for a contact board. I couldn't be bothered fiddling around with the traces, so I just drilled a hole through the middle that was the same size as the small spring on the FET driver. 

Copper braid was added to the driver first and threaded through the hole. The small spring was pushed through the contact board until it was flush, then solders into place. 

I kept threading the braid through the battery spring, soldered everything down, and added ground wires to the driver.

 

 

The parallel leads were bundled together and soldered to the LED +\- pads. Each set of leads runs three XMLs in series. 

Notice the bit of black shrink tubing on the - set of leads. I only had one color wire, and didn't want to get confused.

 

In the end, this light was interesting to put together.

This  is the part where I'm going to need some help. With the emitters wired 3P3S and a Zener diode in the mix, I have no idea how to calculate how much current per emitter I'm getting with 3 x 26650 in series.

I also had no idea this driver had five modes until I turned it on.

Tail readings with 3 x KingKong 26650

100% - 10.09A

          - 4.36A

          - 1.78A

          - 0.34A

          - 0.10A

I didn't know what to expect when I first turned it on. But it's real bright and I'm real happy. Plus I won't have to pull out a dead KD driver after twenty minutes.

It was a long day, so I haven't had time to braid the tailspring, and the reflector is sitting up on a couple of the centering discs. I'll fiddle with that stuff tomorrow.

And to top off the bottom, my signature clear bootcap.

 

Happy Modding.

 

Edited by: Ouchyfoot on 07/12/2014 - 05:20
Ouchyfoot
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I just had the light outside and it’s awesome. I really didn’t think it was going to be so bright.
I wish someone could help me confirm what kind of current I’m getting per emitter.

RaceR86
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Sweet.

Unless I am missing something you are looking at 30A divided between the 9 emitters. So 3,3A to each emitter.

Same brightness as my 9xT6 light now.. Which is stupid bright! Big Smile This is why many like these FET mods. Wink

BLF LED database – collaboration spreadsheet and latest news about where to buy LEDs
http://budgetlightforum.com/node/19342

Ouchyfoot
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Thanks RaceR86.
Those were the numbers I came up with, but they seemed too good to be true. Should there be some allowance in the equation for the Zener diode?

Ouchyfoot
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RaceR86 wrote:
This is why many like these FET mods.

Now to figure out how to run one with a light that has an odd number of emitters. (5 or 7)
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Ouchyfoot wrote:
Should there be some allowance in the equation for the Zener diode?

Sorry, I don't understand the question.

You have a linear driver. Input amps is the same as output amps.

This is just like a single cell light running a FET driver. Only that you have 3 batteries in series, and therefore also need to have 3 emitters in series.

The Zener is basically there in order to fix the input voltage to the MCU, because the MCU is not built for 12V input, so the Zener takes care of that bit, as far as I know. (Im not much into the technicalities of the zener mod, I just know it works.)

I don't think many have done these mods with 12v input yet. Only heard RMM mention it. Is it the same zener diode as used on the regular (2 cell in series) zener mods?

Ouchyfoot wrote:
Now to figure out how to run one with a light that has an odd number of emitters. (5 or 7)

If cells are in parallel, you can just wire all emitters in parallel. Otherwise, not so easy..

BLF LED database – collaboration spreadsheet and latest news about where to buy LEDs
http://budgetlightforum.com/node/19342

Ouchyfoot
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Quote:
Is it the same zener diode as used on the regular (2 cell in series) zener mods

Yes. Just the standard Zener diode and R200 resistor.

Okay. Here’s my question, and it’s not a joke. I’m dead serious.
Can one of these drivers be modded to run 6 cells in series? Yes really. 6 cells in series with 12 emitters.

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Ill leave that question to others.

But Im planning on running 6cells (2s3p) with 12 emitters (2s6p) from Zener modded FET driver.

BLF LED database – collaboration spreadsheet and latest news about where to buy LEDs
http://budgetlightforum.com/node/19342

Ouchyfoot
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Are we both looking to mod the same light?

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BLF LED database – collaboration spreadsheet and latest news about where to buy LEDs
http://budgetlightforum.com/node/19342

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That’s the one I’ve been planning on modding ever since you showed it to me. Looks like were building the same light. Hope you don’t mind. Are you going to keep the XM-Ls or go XM-L2? Lots of investment for twelve new emitters.

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Cool! Go for it!

I have not decided between XM-L2s or XP-G2s.

The build will probably have to wait some time though. So you might beat me too it.

BLF LED database – collaboration spreadsheet and latest news about where to buy LEDs
http://budgetlightforum.com/node/19342

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RaceR86 wrote:

Cool! Go for it!

I have not decided between XM-L2s or XP-G2s.

The build will probably have to wait some time though. So you might beat me too it.


I could probably use some advice on the way. I always find unexpected hurdles.
I’m ordering it now. I’ve had it bookmarked for ages and look at it every day. It was only a matter of time. I was originally trying to decide if I wanted the Hyperboost, but it has no modes. This light will get hot on high.
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whoaa.. nice mod, I was about to give up on my 9T6.. I guess this will help me kick start my project again.. thanks,
BTW is this FET driver was the one meant for building Mt-G2 light?

The only way to do a great work is to love what you do.

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Yes. The same one.

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unknown00101 wrote:
Dx has the xml2 version for a bit more.

http://www.dx.com/p/kinfire-k1200s-12xcree-xm-l2-8700lm-5-mode-high-powe...


I don’t know if I want to trust DX. It does say XM-L2, but they still have the stock XML pictures. I mean if they’re XM-L2 great.
Now I don’t know what to do.
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I wonder if I can run that FET driver with 9 XP-G2 LEDs on noctigon? :bigsmile:

The only way to do a great work is to love what you do.

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Nice! What firmware did you use on that FET driver?

man 10A whoah! Gotta be getting mighty warm on high

Excellent job!

DayLighter wrote:
I wonder if I can run that FET driver with 9 XP-G2 LEDs on noctigon? :bigsmile:

absolutely!
Will be pushing ALOT of amps but if the XP-G2 can handle it…will make one HECK of a thrower !
Ouchyfoot
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I got the FET driver from RMM.

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OOOohhh.. my hand are itchy tonight.. I got spare MT-G2 FET driver and sadly no XP-G2 on noctigon :_(
can you mix them LEDs? say 6 XM-L and 3 XP-G2? in the middle? is that even possible? Smile

The only way to do a great work is to love what you do.

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DayLighter wrote:
OOOohhh.. my hand are itchy tonight.. I got spare MT-G2 FET driver and sadly no XP-G2 on noctigon :_(
can you mix them LEDs? say 6 XM-L and 3 XP-G2? in the middle? is that even possible? Smile
I think Vf is different between the dies, would cause one set to pull more current than the other…don’t think they will work w/o one set of them getting way to hot and burning out
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Ouchyfoot wrote:
unknown00101 wrote:
Dx has the xml2 version for a bit more.

http://www.dx.com/p/kinfire-k1200s-12xcree-xm-l2-8700lm-5-mode-high-powe...


I don’t know if I want to trust DX. It does say XM-L2, but they still have the stock XML pictures. I mean if they’re XM-L2 great.
Now I don’t know what to do.

I’d probably take the chance for $1.30 difference. L2 in the link, title, desc, and specs. Worst comes to worst and they are XML you could probably file a ticket and get the difference back at least.

I really liked the light as soon as I saw it as a new arrival, but the price tag and my lack of 6 good cells to dedicate to it Sad .. Would love to see what you guys can do with it.

Does that link pull up in Spanish for anyone else?

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I kept getting it in Spanish. I mucked about for awhile til I got the English site.
I ordered it there. There was a BLFDXDEAL coupon that gave me $4.50 off.

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I had a bit of a scare. Light was getting sporadic when I turned it on. Thought the switch was going. Bridged the tail and was only getting faint modes, then nothing, then very faint lows only.
I went to pull the driver and noticed there was a tiny bit of play in the driver. I cranked down the retaining ring and all Is good.

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I did a little tweaking on my light today. Braided the tailcap and got the reflector sitting down properly.

Three of the emitters, though not off center enough to notice, were off enough that the reflector was sitting on top of the raised part of the centering discs. This caused the bezel to not tighten properly and leave a gap. I removed the three offending discs and sanded the raised part flush. Since the other six were still intact, the reflector centered itself nicely and the bezel threads down tight.

I remembered I had some UCLp AR Acrylic Lenses for my COURUI that LinusHofmann brought up in his COURUI thread. http://budgetlightforum.com/node/26701?page=2#comment-509979 I had ordered two, and they sent me three...and they were the perfect fit for this light.

These are really nice lenses, and they come in large sizes from flashlight lens.com.

http://www.flashlightlens.com/index.php?app=ecom&ns=prodshow&ref=UCLp_AR

 

When you install them, it looks like air, like nothing is there, with a Light transmittance: 97%

 

If you hold it just right, you can see a pinkish tone from the AR coating.

Now that I've got everything just how I want it, this light definitely earned its clear bootcap award.

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Ouchyfoot wrote:
…I remembered I had some UCLp AR Acrylic Lenses for my COURUI that LinusHofmann brought up in his COURUI thread. I had ordered two, and they sent me three…and they were the perfect fit for this light.

Glad to hear you’re happy with the UCLp AR lenses, I’m looking to outfit the worthy lights in my collection with them. Expensive, but worth it IMO. I know they’re not glass, and some people just won’t like that, but their performance metrics indicate that it really doesn’t matter that they’re plastic. Combined with the fact that they’re almost impossible to shatter, I could see these performing phenomenally well in EDC lights, or really any light that sees a whole lot of abuse.

Ouchyfoot
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I’m not worried about scratches. Big lights like this don’t end up in pockets and when you set them down on their heads the bezel keeps them from contacting the ground. These are the only AR lenses I know of that come in the larger sizes. If flashlightlens.com backs them, they’re good.

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RaceR86 wrote:

Cool! Go for it!

I have not decided between XM-L2s or XP-G2s.

The build will probably have to wait some time though. So you might beat me too it.


When I started out, I had no idea what the output was going to be in this light. If it had been under 2A per I would have used XP-G2.
When that 12 XML light arrives, I’m going to jury rig it with the stock emitters in place (connect everything externally from the front) to get an idea of the output with 6P2S. Then I’ll decide whether to go XPG or XML.
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That AliExpress light is the same as the KD http://kaidomain.com/product/details.S022371? Might be safer from A-E though...

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I’ve always had good luck and fast shipping from KD. I ordered the one from DX. I really didn’t want to, and it might have been a mistake, but I’ll be able to let anyone know whether it really has XM-L2 in it. I’m kinda doubting it.

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