21700 D4K is available for pre-order

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Hank Wang
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SFT-40 & FC-40 options have been added for Noctigon K1 flashlight,

https://intl-outdoor.com/led-flashlights/k1-21700-thrower-led-flashlight...

https://intl-outdoor.com, Noctigon, Emisar, flashlight components.

Hank Wang
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RGB button has been added for D1, which can show the voltage just as K1, choose at hand which RGB color you want.

https://intl-outdoor.com, Noctigon, Emisar, flashlight components.

kokosnh
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Now how about fitting that RGB button in D4v2?

Any plans for dual channel CC drive for D4v2?   

thefreeman
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kokosnh wrote:
Any plans for dual channel CC drive for D4v2?

The D4v2 is already available with dual channel : https://intl-outdoor.com/tint-ramping-instant-channel-swiching-led-flash...
trakcon
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Hank Wang wrote:
RGB button has been added for D1, which can show the voltage just as K1.

These look cool. Thanks for keeping the single color option available, too.

m03da
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Whooooo! Pretty colours!

Hank, these look like discrete R, G and B LED packages as opposed to the RGB combos used for aux lights, is that the case? Could other combinations be possible?

trakcon
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m03da wrote:
Whooooo! Pretty colours!

Hank, these look like discrete R, G and B LED packages as opposed to the RGB combos used for aux lights, is that the case? Could other combinations be possible?

A very good and interesting question.

kokosnh
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thefreeman wrote:
kokosnh wrote:
Any plans for dual channel CC drive for D4v2?
The D4v2 is already available with dual channel : https://intl-outdoor.com/tint-ramping-instant-channel-swiching-led-flashlights/new-emisar-d4v2-with-tint-ramping-and-instant-channel-switching.html

Aren't these FET ?  
thefreeman
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kokosnh wrote:

thefreeman wrote:
kokosnh wrote:
Any plans for dual channel CC drive for D4v2?
The D4v2 is already available with dual channel : https://intl-outdoor.com/tint-ramping-instant-channel-swiching-led-flashlights/new-emisar-d4v2-with-tint-ramping-and-instant-channel-switching.html

Aren’t these FET ?  

Constant current linear, like all the dual channel models

Hank Wang
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m03da wrote:
Whooooo! Pretty colours!

Hank, these look like discrete R, G and B LED packages as opposed to the RGB combos used for aux lights, is that the case? Could other combinations be possible?

Hi, would you please let me know what other combinations you mean?

https://intl-outdoor.com, Noctigon, Emisar, flashlight components.

g_damian
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DrDevil wrote:
Limsup wrote:
LiteintheNite wrote:
How is the problem solved with the smoking B35AM in the new batch ?! I heard from first new D1v2 without the problem in Turbo …

The problem is not solved. My D1 (received a couple days ago) with B35AM 5000K smokes on turbo.

One solution to avoid the smoke would be to configure the light to reduce output. Users found that B35AM does not smoke if output is limited to 140/150. So, I disabled turbo and limited the ceiling level to 140. One thing to note is that this configuration can be reset, so it would be crucial that users remember to configure the light every time they reset or reflash the light.

If you let it smoke with the reflector on, it seems that the reflector gets stained. So, I would highly recommend that you avoid the smoke.

Hank said he would limit the current in the future batches, but it has not been announced yet as far as I know.

There are 2 reports, comments over on TLF about the case
https://www.taschenlampen-forum.de/threads/neue-emisar-d1.86602/post-1172775

I´m not sure if you can see the post without logged in
The user Bobbers wrote:

“My D1 B35AM 4500K arrived today, Hank texted me yesterday that all the lamps are going through final inspection and that I can use the turbo as normal.
In any case, the first 40-50 seconds of turbo did not show any smoke on the LED :)”

And the user ennokin wrote:

“I ordered my D1 B35AM 4000K on 08/01 and he already sent me the new version. Turbo works without smoking, he also confirmed this to me by email.”

It seems the new version is ready. But we have to wait for Hanks reply

I received mine D1 B35AM 5000K couple days ago, with full battery it pulls 3.7A measured at the tailcap. For comparison, DM11 on level 140, pulls 4.05A.

So I guess we might assume that problem has been solved by Hank.

On a side note, the beam of B35AM 5000K looks almost perfect, very close to BBL, a bit below on medium level. It’s puzzling that B35AM 4000K in DM11 for higher current produces a bit less lux. For almost the same current SC64w HI produces even less lux and it has lower CRI. win-win Smile

LiteintheNite
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Dear Hank,

you postet since these Post of me and DrDevil some new things, but not answered the question of the solution for B35AM. I think, it can not be difficult, to explain this thing, because many of your buyers have to handle this issue of your smoking B35AM in the first D1v2 …

Thanks a lot !

LitN 

Friend of Flashlights ;-)

zumlin
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Hank Wang wrote:
m03da wrote:
Whooooo! Pretty colours!

Hank, these look like discrete R, G and B LED packages as opposed to the RGB combos used for aux lights, is that the case? Could other combinations be possible?

Hi, would you please let me know what other combinations you mean?

I think he means something like this, but in the switch. e.g. a pair of pink, a pair of warm white and a pair of ice blue

(Pic is a link)

kokosnh
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thefreeman wrote:
kokosnh wrote:

thefreeman wrote:
kokosnh wrote:
Any plans for dual channel CC drive for D4v2?
The D4v2 is already available with dual channel : https://intl-outdoor.com/tint-ramping-instant-channel-swiching-led-flashlights/new-emisar-d4v2-with-tint-ramping-and-instant-channel-switching.html

Aren't these FET ?  

Constant current linear, like all the dual channel models 


Oh, well that's better, but how about a dual channel boost driver? 
I would probably just mix the leds, on boost driver, then buying linear dual channel. 

@LiteintheNite My D1 mini B35AM 4000K (first batch) pulls around 2.78A on the default max ramp (that's twice less, as on the TURBO), just letting you guys know.     
thefreeman
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kokosnh wrote:

thefreeman wrote:
Constant current linear, like all the dual channel models 


Oh, well that’s better, but how about a dual channel boost driver? 
I would probably just mix the leds, on boost driver, then buying linear dual channel. 

@LiteintheNite My D1 mini B35AM 4000K (first batch) pulls around 2.78A on the default max ramp (that’s twice less, as on the TURBO), just letting you guys know.     

Not enought space on the board for a dual channel boost driver.

m03da
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zumlin wrote:
I think he means something like this, but in the switch. e.g. a pair of pink, a pair of warm white and a pair of ice blue

Oh yes. My choice would probably be cyan/ice, magenta and amber..

Andometto
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Hi,

The RGB switch sounds super cool but I just have a few questions.

1.) Is it a fixed selection of colours that is constantly lit up with the option of high brightness, low brightness, blinking mode and off? or does it cycle through the colours like the auxiliary lights do on a D4V2, so you can make the switch blue for example and when you get bored of it you can change it to red?

2.) If you have to choose 6 colours for a fixed selection what colour options is there to choose from?

Many thanks.

Mark M
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Think of it like having D4V2 auxiliaries in a switch, with all of the same functions.
Blue, purple, red, yellow, green, light blue, white, are individual colors you can select, along with voltage indication, and having it cycle through the various colors.

sergx
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Hello guys! It’s been quite some time since the boost driver was released. Does anyone have any real measurements of performance and sustained output between fet linear and new boost driver in Hanks 4x leds flashlights? Is the loss of performance worth it? I’ve seen posts on reddit claiming that the sustainable output is almost unchanged.

thefreeman
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sergx wrote:
Hello guys! It’s been quite some time since the boost driver was released. Does anyone have any real measurements of performance and sustained output between fet linear and new boost driver in Hanks 4x leds flashlights? Is the loss of performance worth it? I’ve seen posts on reddit claiming that the sustainable output is almost unchanged.

Tactical Grizzly made a direct comparison of the D4Sv2 linear and boost with CULPM1 LEDs : https://tgreviews.com/2022/04/28/emisar-d4sv2-review-three-versions-comp...

Quote:
Performance (Standard VS Boost Drivers): The boost driver takes a lot longer to heat up and step down (even at the same brightness level, see Linear+FET high vs boost Turbo in the thermal stepdown graphs). The boost driver maintains ~40% higher output too, which is nice.
sergx
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Thank you so much! I didn’t follow the r/flashlights as much over the summer and missed it!
Last question, has there been any hints of a new boost driver or even an updated D4 from Hank?
As far as I could figure out to fit a bigger inductor (which would be able to give up to 3A to the each LED) it only needs a few millimeters longer body of flashlight. Hank could get rid of this variety of drivers at once and get the perfect flashlight…

idleprocess
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sergx wrote:
Thank you so much! I didn’t follow the r/flashlights as much over the summer and missed it! Last question, has there been any hints of a new boost driver or even an updated D4 from Hank? As far as I could figure out to fit a bigger inductor (which would be able to give up to 3A to the each LED) it only needs a few millimeters longer body of flashlight. Hank could get rid of this variety of drivers at once and get the perfect flashlight…

The D4V2 looks to achieve many of these things – with the optional boost driver.

sergx
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The D4V2 looks to achieve many of these things – with the optional boost driver.[/quote]

Everything except its limit due to the small inductor is only 2A per led. That’s the only reason so many of us still have doubts about which version to take. The more practical or the hotrod toy.

HiTiT
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How can I order the new kr4 boost driver?

elendur
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On the order page, there’s a 12$ upgrade optio

sergx
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Hey!
What if I order new D1 with FC-40 – what driver Hank will choose? I do not see option to add boost driver on the D1 flashlight page but I think it should be there or Im wrong?
And are fc-40 4000-4500k from Hank good bins? I’ve seen some fc-40 have a beautiful pink tint almost like nichia. That’s what I’d like to get with 4000k option. Innocent

Btw am I right in assuming that the fc-40 will be more bright than the dd519a?

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sergx wrote:
Hey!
What if I order new D1 with FC-40 – what driver Hank will choose? I do not see option to add boost driver on the D1 flashlight page but I think it should be there or Im wrong?
And are fc-40 4000-4500k from Hank good bins? I’ve seen some fc-40 have a beautiful pink tint almost like nichia. That’s what I’d like to get with 4000k option. Innocent

Btw am I right in assuming that the fc-40 will be more bright than the dd519a?

The quad-emitter lights can have the LED’s wired differently for different drivers, but that’s not possible with one emitter. So there are no user-selectable driver options for single emitter lights like D1(V2).

GT-FC40 is a 12V-only emitter so it has to come with a boost driver. The same is true for B35AM.

GT-FC40 in D1(V2) will produce about twice as many lumens as a dedomed 519A in a D1(V2).

FWIW I have not found any of the FC40’s I’ve tested (one in an E70, one in a KR1, one in a M21D, and eight in an X50) to have pink tint. They’ve all been neutral to slightly green tinted.

If you want a light from Hank with pink tint and a boost driver, get one of the quad emitter lights with dedomed 519A’s and the boost driver upgrade.

sergx
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Hmmmm

This is beamshot from 1lumen review D1v2 with 5k fc-40 inside


This one from reddit. 4K looks very good!

Rosy! Maybe they are different from batch to batch?

puglife2
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i did a reflector comparison yesterday with my 519A D1, they comes with SMO by default but personally i prefer OP


^ OP ^

^ SMO ^

^ OP ^


^ SMO ^

^ OP ^


^ SMO ^

^ OP ^

^ SMO ^

^ OP ^

^ SMO ^

^ OP ^

^ SMO ^

^ OP ^ sorry i missed this shot Crying

^ SMO ^

sergx
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OP wins. Personally, I hate the bright yellow stain in the middle.

Guys, I would really appreciate your beamshots of the D1 with the FC-40.

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