What did you mod today?

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Ratus
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Nice! I knew you’d like firmware mods Kaybi.

Refugee from CPF and long time lurker on BLF.

Ratus_ on r/flashlight.

1536 on the GT List, Arrived 05-23-18

1271 on the FW3A List

 
 
djozz
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Yesterday I did a very experimental mod, I modded a Securitying AA zoomie (I bought it here) with a bistro driver and an Oslon Black Flat. The experiment was that the Black Flat was reflowed on a DTP-board, but to prevent electrical contact between board and pill (the thermal pad of the Black Flat is connected to led-minus), it was glued in with Arctic Alumina Adhesive. The question was if the thermal transfer to the pill would be high enough for this high power mod.

The answer is: no. The drive current on a purple Efest 14500 is over 3.5 A, with the output (flood setting) within 30 seconds dropping from 500 lumen to 275, so 45%. This is even worse than the first DQG tiny 18650 with its XM-L led on a frp board.

Still, the Black Flat is a tough led, so despite the huge temperature sag of the led, it works fine, and it has become a pretty impressive little flashlight. The numbers (37kcd at start, 27 kcd at 30 seconds) are worse than my best dedomed XP-G2 AA zoomie mods with same 18mm lens size (42 kcd steady), but the spot that the Black Flat produces is far better looking: very distinct square with even illumation, no dots.

Here’s a few pictures of the mod:

The lens was taken out and replaced by the lens from a sk68 clone (sanded the side to fit), this lens has a shorter focal length and enables focussing the spot to a sharp image of the die (the stock lens did not do that)

The stock driver is 14mm and clamped in in a weird way. I found that an exactly 15mm driver could be clamped in between pill and a tiny edge on the inside of the battery tube, it just needed sanding 1.2mm off the underside of the pill. I used a 15mm Oshpark board (made by Warhawk at the time) filled with the components taken off a Banggood X5/X6 bistro driver, except the FET that is too big, I used a LFPAK33 FET bought from Mtn Electronics.

The glueing in of the ledboard was a stressful and dirty job it was difficult to keep the board insulated, and when the adhesive was almost completely set I discovered that the holes did not line up and the board needed twisting, I barely managed to get that right. I made a 10 minute video of the process.


The led under lens in the finished light

Beam on the wall

Beam on the roof at the other side of the square, roof is at 40 meter.
Mike C
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That little corner on the LED pattern is a shame. Too bad it isn’t a full square.

djozz
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Mike C wrote:
That little corner on the LED pattern is a shame. Too bad it isn’t a full square.

There is a newest version of the Black Flat, with even better thermal resistance and without that corner, unfortunately only the 3-die and 5-die version is brought to the market, the single-die one is not being made (yet?).
kiriba-ru
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djozz wrote:

There is a newest version of the Black Flat, with even better thermal resistance and without that corner, unfortunately only the 3-die and 5-die version is brought to the market, the single-die one is not being made (yet?).

Not yet. We should be ready that most modern small die leds that are made for automotive industry couldnt be used in flashlights.
But, anyway this osram leds looks very pretty in comparation with crees. Lumens drop from temperature increase is much smaller, this can make big sense in flashlights.
electricjelly
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DB Custom wrote:

While the Reaper is growing under the MT-G2, I’m hoping this will let it really put down some roots and give me those devilish little ugly peppers I crave. Smile

MT-G2’s make great little grow lights. Here my crystal red shrimp tank. Its only source of light is the mt-g2 I have wired up to a wall wart. All the plants in the tank are very happy.

I am curious how well the upgrade cobb led works out though.

DB Custom
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Upgraded my plant light by removing the Delrin plug and making an aluminum tube for it so heat would rise through the aluminum and also up and out… even the rod it hangs on will help disperse heat. So now I’ve cranked it up to a steady 0.425mA and it’s making 962.55 lumens via my light box….. I used the meter to measure at the ground level outside and this light is making pretty close to TX sunlight, without the massive heat.

With holes in the aluminum tube spaced at 1/2”, and holes in the vertical post at 3”, I’ll have nice adjustability as the plant grows.

electric jelly, your shrimp look content under that MT-G2, what power level is the wall wart or have you measured at the emitter? I went with this COB as I knew it was rated at 90+ CRI, and it makes a nice floody light with no artifacts. (and I had one sitting around doing nothing)

Edit: Since I changed from the MT-G2 to the CXA1512F COB (Aug 19, 2017) it’s been really growing, you can see daily changes easily. Like a hot little weed, it is! Big Smile (Yes, the past 3 days have shown a marked growth improvement. Big Smile )

KelG
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Now, I’m trying to find a way to remove the tailcap pcb, so I can place a magnet there. With some luck, a 1mm or 1.5mm magnet will have enough strength to hold the D4 up, which is the biggest magnet I figure will actually fit in there.[/quote]

Your answer is here

http://budgetlightforum.com/node/55736#new

Cheers

Kel

BLF = Buy Lotsa FlashlitesLaughing

kiriba-ru
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I have tried to asked this question several members in pm, but had no answer. Seems this is proper discussion in this thread now.
How can we compare “white” leds with wide spectral range to special leds made for plants growing? Is it possible to calculate independent lumens for specipic nm range, and compare this numbers with lumens measured from special leds? Last number is also problem cause manufactures usually give numbers in some specific value that cant be easily taken with general meters.
P.S. In my suppose, new white leds have so big full output that probably (mostly high cri leds) have enough output in specific nm range to beat special leds with their tiny output…

djozz
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Reaper grow time-lapse!

djozz
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There is ongoing development in what spectrum is considered optimal for plant growth. And that spectrum has moved a bit more towards a full sun spectrum. So the bit weird blue/red mix of leds as plant growth lamps currently may not be best anymore.
I found this (not too smart) article (by a company so it may always be biased): https://www.redusystems.com/en/innovation/entire-par-light-range-has-fun...

kiriba-ru
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I know that some companies use white leds, others mix of color leds, and all have achievements.
Im interested in ways of measuring, calculating and comparation leds with wide and narrow spectrum range. How to get this umol/s and umol/J values? How to isolate narrow strip from full spectrum wide led diagram and get right values? (I suppose that some special glass/plastic pieces that can pass through narrow range are needed.)

Tom E
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Finally started on modding my Haikelite MT03 I bought back in May. After tearing it down, discovered couple issues.

One dab of grease, only covers about 50% underneath the 3 LED's, plus jagged wire holes:

Tarnished up copper:

Not only jagged edges, but the wires were pinched on an edge of the housing, so they tore when removing them (I hope it was upon removal...):

These are the screws holding down the MCPCB. They look ok, but they don't tighten - threads in the shelf are stripped:

Here's the wire shredder and pincher:

MCPCB feels pretty thin at 1.5 mm

for such a large one:

Lot a little solder balls:

This is after some work - used the rotary tool to drill out thise pinching edges, and angle cut those sharp edges off on the holes:

Reflowed the XHP70.2 P2 3B's,trimming off the yelloe covering on the corners. Dunno if will help, but I know KawiBoy said it improves the beam on dedomed LED's. Hoping maybe it will reduce the yellow halo, maybe?

The latest SRK LDO driver from HQ seems perfect for this mod. All I had to do was sand off the tabs on the edges, and it fits perfect under the heavy retaining ring. I'll just transfer the double springs over after reflowing the driver. I test fit the driver, did continuity tests and the grnd ring contacts perfectly.

With a 2S2P battery tube, it's a fairly easy mod, and love the bulkiness of the MT03 - still compact but more heat sinking I'm hoping, because the amps will sure get up there. I'll probably use a SIR404DP FET and a single 7135. The HQ driver is very flexible and versatile for configuring it in various ways.

Enderman
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Mike C wrote:
That little corner on the LED pattern is a shame. Too bad it isn’t a full square.

If you use a wavien collar then it becomes nearly invisible thanks to the reflected die image and white material around the die.
luminarium iaculator
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djozz wrote:
Yesterday I did a very experimental mod, I modded a Securitying AA zoomie (I bought it here) with a bistro driver and an Oslon Black Flat. The experiment was that the Black Flat was reflowed on a DTP-board, but to prevent electrical contact between board and pill (the thermal pad of the Black Flat is connected to led-minus), it was glued in with Arctic Alumina Adhesive. The question was if the thermal transfer to the pill would be high enough for this high power mod.

The answer is: no.

Interesting…

All early Vinhnguyen(famous CPF moder) mods were don with AA adhesive. But they were applied very thinly and under hard press on classic cree leds(xpg2, xml2).

The problem with osram leds is that you probably can’t give them hard enough pressure that will squeeze excess off AA and stick it firmly to pill for better heat transfer cause it will start making contact with pill anyway and puuf! I tried that kind of pressure on 4715as and poof happened… Method I use now for Osram IR are gentle circular moves, and only pressure is pressure from tweezers so I actually feel when AA starts spreading under dtp board. I don’t see or measure any performance drop on that kind of builds but they are only up to 2A.

djozz
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@l.i.
Yes, the AA layer was much thicker than it would have been if I could just press it down firmly, it shorted if I did that. Perhaps someone will manage to get the layer thinner still without shorting it, but in my case with resulting heat sag the Flat Black looses the competition with the dedomed XP-G2. I doubt even if the heat sag is better than if I used a non-DTP board.

The trick will probably work much better in a mod with one of those chunky Maxtoch boards: more surface area to transfer the heat, and if the host allows lapping the upside of the pill so that both surface are nicw and flat, you can make a nice thin layer of AAA.

luminarium iaculator
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djozz wrote:
@l.i.
Yes, the AA layer was much thicker than it would have been if I could just press it down firmly, it shorted if I did that. Perhaps someone will manage to get the layer thinner still without shorting it, but in my case with resulting heat sag the Flat Black looses the competition with the dedomed XP-G2. I doubt even if the heat sag is better than if I used a non-DTP board.

The trick will probably work much better in a mod with one of those chunky Maxtoch boards: more surface area to transfer the heat, and if the host allows lapping the upside of the pill so that both surface are nicw and flat, you can make a nice thin layer of AAA.

Does it have any sense to try with kapton tape?

djozz
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I can imagine that a AAA layer can be made thinner than Kapton tape and then, AAA is at least designed to transfer heat better than average, while Kapton tape AFAIK is not designed for heat transfer at all.

Tom E
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I have no clue what AA or AAA stuff is or even why it's being discussed, but before we get to AAAA I thought someone, somewhere might be interested in the MT03 info and mod? smile

djozz
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Sorry Tom for ignoring your MT03 work Innocent
From the beginning I’m not at all into the Haiklite flashlights (don’t like the chunky designs), but considering that it is a rather new brand and seems to be founded by enthousiastic and knowledgable people, it is a pity that they do not have their production method and QC under control. Among the other faults, a ledboard that is not flat on its shelf is an easily avoidable (flattening the shelf should be the very last machining step) and unforgivable blunder because it directly affects the performance in such a high powered light.

XHP70.2’s with that driver is a great update! Waiting for finish and numbers Smile

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I've been disappointed with the QC as well coming from them, but I'm lik'n the chunky design more and more. Mass and surface area are the two big issues with high amps, so they got the mass part down pat, as long as I can fix up the other stuff smile. I have 2 other Haikelite on order, the TK35 and SC01, and planning on getting the MT07S.

What I like bout what I'm seeing is easy modding - nice driver retaining rings, standard size drivers in width and thickness, easy modding for the LED's and battery setups, etc.

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Made some SST40 led testing so I ended up with a Convoy C8 with TA17 driver, SST40 N4 BA dedomed led, AR coated glass lens, bypassed springs, 8,6A current in turbo, 2000 lumens, 136 Kcd and 738m throw Big Smile In a C8 it is insane!

DB Custom
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Beamshots Zozz? Sounds like a pretty awesome smallish dazzler…

Tom E
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I got 3 of those on the way from KD. Those are pretty nice #'s, specially the lumens for a dedomed LED that throws almost as good as the best dedomed XP-G2's, I think. Didn't know you can get that many amps out of one. Might just put them in a SRK. What do you think of the tint after dedoming, and the beam pattern?

Hhmm, for that price, might order a bunch more.

Ohhh - and these are "only" N4 bins. There's 2 higher bins listed in the specs, but who knows if they will ever happen (N5 and P2).

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DB Custom wrote:
Beamshots Zozz? Sounds like a pretty awesome smallish dazzler…

Just a really crap phone pic I have. ISO3200, S: 1/17s, F: 2,20
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Dang y’all!
Now I too have an order from KaiDomain… where does it ever end? lol

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The dedoming wasn’t clean as on cree leds but the tint doesn’t shifted very much. Overall I like it. And it is cheap.

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Which method did you use in the de-doming process?

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Upside down on some wires in regular 95 octane petrol. It took 3-4 hours and a bit of picking with a needle and falled down. After that cleaning with alcohol rinse and a needle under magnifying glass.



KawiBoy1428
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First attempt at XHP Soup, HOT fluid de-doming (tried 2 different fluids, the second fluid performed better) XHP35’s 50’s and 70’s all meat no veggies! Big Smile

Brand New $8.00 Garage Sale Crock pot, so far soooooo gooooood! Wink

I have seven SST40’s and a bunch of the W2’s from Kaidomain http://kaidomain.com/p/S026966.Cree-XP-L-HD-W2-1B-White-6000K-6500K-LED-Emitter-1-pc

Along with more top Binned XHP35’s HI E4-1A’s and Old Style P2-1C 70’s to do next……with a stronger fluid……

KB1428 “Live Life WOT

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