Emisar D4S review

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emarkd
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The great thing about this design is that the secondaries are all on their own little separate board. So you pull the board out of the light, toss it on a hot plate/stovetop/frying pan/whatever, heat gently, then when the solder flows you just flick every one of those things right off. They look like 0805’s to me, same ones many of us use to build lighted tailcaps, so pretty easy to find in lots of colors to drop back on.
Obviously you’ll have to work kinda quick and watch your heat or you’ll be burning the mask off of the board, but I don’t expect it to be a very hard mod at all.

Lexel
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emarkd wrote:
The great thing about this design is that the secondaries are all on their own little separate board. So you pull the board out of the light, toss it on a hot plate/stovetop/frying pan/whatever, heat gently, then when the solder flows you just flick every one of those things right off. They look like 0805’s to me, same ones many of us use to build lighted tailcaps, so pretty easy to find in lots of colors to drop back on. Obviously you’ll have to work kinda quick and watch your heat or you’ll be burning the mask off of the board, but I don’t expect it to be a very hard mod at all.

they are 0403 LEDs a lot smaller than 0805 (roughly 1/4 area)
but handable compared to 0201

Spud
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Looks like Outdoor refunded the 26650 i purchased with the light, i know low stock was mentioned, but any one else or something to do with shipping to Australia. i noticed they are still selling instore.

LiitoKala store charges $27 shipping.
L4M4
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Lexel][quote=emarkd wrote:
they are 0403 LEDs

Then you need nothing special, a single soldering Iron + a blob of solder will unsolder these without any problems.

But if I look at this board – one resistor, 16 tiny LEDs and a very thin PCB – buying those in different colours should be very cheap

emarkd
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Lexel wrote:
they are 0403 LEDs a lot smaller than 0805 (roughly 1/4 area) but handable compared to 0201

Ah, thank you for the correction. I’ve only got 0805 and 0604 on hand, so guess I need to place a parts order before my light gets here.

staticx57
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0403 as if I dont need more stress

bansuri
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L4M4][quote=Lexel wrote:
emarkd wrote:
they are 0403 LEDs

a single soldering Iron + a blob of solder will unsolder these without any problems.

I like the way you think! Just get it done.
Now to track down some 0403s.
Regarding color, it seems like I read somewhere on one of millions of threads that the color green is the best for signalling or seeing in a busy environment because something to do with how we see colors. Does that sound like BS?
I intend to use the secondary emitters for location purposes only. Other people may be handling it or it may get jumbled into the mess while camping or something. Wanted to put a color on that is most conspicuous to our eyes.

Also, if anyone hasn’t had the luxury of using a battery with this capacity yet: if you don’t try to light up the night it will last for an amazing length of time. Unbelievable.

Finally, for size reference, if anyone has a Convoy BD06 this is very similar in size if you were to cut the head off the BD06 at the groove directly above the switch.

scintillator
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I am a novice but I would like to replace led to red.
I have some 0805 led they measure 3.21mm x 1.5mm.
That leads me to believe that the 0403 led is less than a millimeter,that seems too small??

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Lexel wrote:
emarkd wrote:
The great thing about this design is that the secondaries are all on their own little separate board. So you pull the board out of the light, toss it on a hot plate/stovetop/frying pan/whatever, heat gently, then when the solder flows you just flick every one of those things right off. They look like 0805’s to me, same ones many of us use to build lighted tailcaps, so pretty easy to find in lots of colors to drop back on. Obviously you’ll have to work kinda quick and watch your heat or you’ll be burning the mask off of the board, but I don’t expect it to be a very hard mod at all.

they are 0403 LEDs a lot smaller than 0805 (roughly 1/4 area)
but handable compared to 0201


Where do you get the 0403 LED’s at Lexel?

KB1428 “Live Life WOT

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bansuri wrote:
Regarding color, it seems like I read somewhere on one of millions of threads that the color green is the best for signalling or seeing in a busy environment because something to do with how we see colors. Does that sound like BS?

Green is the sun’s peak wavelength, and most living creatures with eyes are sensitive to green light because that’s the strongest component of natural light. It also tends to be the brightest or most efficient color for emitters and for glow-in-the-dark stuff. Given the same power level for each color, green aux LEDs will generally tend to be the brightest.

However, blue works really well too, and will generally look pretty bright. Most of our high-power LEDs are blue underneath the phosphor layer.

Other colors are generally less bright.

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Lexel wrote:
they are 0403 LEDs

On Emisar’s boards, or just on yours?

Do we know the size of Emisar’s aux LEDs for sure?

Edit: I don’t have good tools for measuring things that small, but I think Emisar might be using 0603-sized LEDs. I’m seeing about 1.7mm x 0.8mm. They appear to be smaller than the clock kit LEDs, which I think are 0805.

It’d be nice if these things all used metric units, instead of inches.

DB Custom
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perzackly 1/5th this big

please use THIS application tool…

bansuri
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ToyKeeper wrote:
bansuri wrote:
Regarding color, it seems like I read somewhere on one of millions of threads that the color green is the best for signalling or seeing in a busy environment because something to do with how we see colors. Does that sound like BS?

Green is the sun’s peak wavelength, and most living creatures with eyes are sensitive to green light because that’s the strongest component of natural light. It also tends to be the brightest or most efficient color for emitters and for glow-in-the-dark stuff. Given the same power level for each color, green aux LEDs will generally tend to be the brightest.

However, blue works really well too, and will generally look pretty bright. Most of our high-power LEDs are blue underneath the phosphor layer.

Other colors are generally less bright.

Thanks for the info!

ToyKeeper
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I finally got the code published…

https://bazaar.launchpad.net/~toykeeper/flashlight-firmware/trunk/files/...

I also added a UI diagram. It’s sort of an awkward mix of Anduril and RampingIOS V2, but I hope the diagram is readable:

eas
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DB Custom wrote:
Ever notice how, when a manufacturer picks up the gauntlet and offers something new everyone screams MORE, you shoulda, you coulda, you oughta….. ?

It’s not exactly a bad thing for manufacturers to have people primed to buy the next revision/model/etc.

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Not in that context eas, but when they hold off buying til the impending next revision, already sure at announcement that there will be changes, then things get a bit wonky.

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My sense is that, at least among likely buyers of Emisar lights, the % of people who will wait for an anticipated update is relatively small compared to the % who will buy one now, and one later.

But that’s really just a guess.

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eas wrote:
My sense is that, at least among likely buyers of Emisar lights, the % of people who will wait for an anticipated update is relatively small compared to the % who will buy one now, and one later.

But that’s really just a guess.

True that!

Lexel
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You can usually reflow a 0603 on a bigger 0402 footprint like I am using
this is what I did on my new Generation 3 tail board a dual footprint, I changed the wideness of 0402 a bit

on the D4 I had to use normal 0402 footprint as its very limited space

scintillator
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I found this info on the WWW.
SMD LEDs are available in four sizes, which are designated 1206, 0805, 0603 and 0402 . 0402 is the smallest, with overall package size of 1.0 mm x 0.5 mm x 0.45 mm (L x W x H). Then 0603 at 1.6 mm x 0.8 mm x 0.6 mm. 0805 are slightly larger, at 2.0 mm x 1.25 mm x 0.8 mm. I measured the 0805 at 3.21 × 1.5,I measured from flange to flange on the bottom.
Looks like they are all available for reasonable price.

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scintillator wrote:
I found this info on the WWW.
SMD LEDs are available in four sizes

They are available in many more sizes, not only 4…

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Note: on the back side there’s an arrow. The arrow points to the negative wire.

Lexel
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there are also 0201 LEDs by now

I ordered one time instead of 0603 inch, 0603(0201) metric resistors
they can be soldered by hand but not easy

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Shocked There’s probably a thousand components that size in my cell phone or other consumer electronics, but I’ve never come across those tiny things in stuff I’m building myself, and I hope I never have to. No thank you.

So did we arrive at a consensus on size? That comparison photo with the ruler only shows tab flanges on 0603 and larger sizes, and I’m pretty sure TK’s pics in the very first post of this thread shows flanges on the LEDs. So I’m thinking they’re probably not 0402s..which is good. But I’m not sure that’s definitive either. I’m prepared to wait and see when my light arrives, I’ve got both 0603 and 0804 on hand already, but I don’t have any 0402s here to try if that winds up being the right answer.

scintillator
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I am going to wait also.
A little off subject but too bad these don`t fit.
https://store.yujiintl.com/collections/frontpage/products/vtc-series-smd...

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I’m going to buy & im going to wait then I’m gonna buy another color then wait then buy one last one then wait and probably get a titanium version then wait then get one off of someone that doesn’t like theirs then wait…

never fear shadows…it means a light shines nearby

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Hi guys has anyone got an email confirmation that there D4S has been shipped? as mines been saying it’s processing since I ordered it 6 days ago. I was under the impression that they were going to be shipped before the 10th August yell is this still the case?

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And today is? The 8th, right? Wink

Sometimes when you order from Intl-Outdoor it seems to be sitting in processing forever and all of a sudden it’s in your mailbox. Don’t know why that is…

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Anyone knows where to buy Shockli batteries that will ship to Australia for this light?

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Very excited about this light. Held off on the Emisar D4 because of the quick thermal step down. Looking forward to see user reports and first impressions.

Several questions for you guys.
Which one (Nichia, XPL Hi, etc) have you been ordering?

The Nichia runs hotter and is less bright than the XP-L HI. But what about when the battery is at half capacity, with less voltage? In this circumstance, since the Nichia has a lower Vf, does this not mean the Nichia will have a better “regulated” output compared to the XPL – HI without significant drop in output?

In other words, other than CRI and TINT, does the lower Vf of the Nichia have any advantages over the other emitter options? Do the lower Vf LED’s have advantages with certain drivers only (ie, Boost, Buck, Linear, PWM/DD)?

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