TK's Emisar D4 review

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ToyKeeper
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Firelight2 wrote:
I also purchased some high-CRI 219C emitters and one of RMM’s off-set quad stars. All for swapping into this light when it arrives.

Be sure to post beam shots of that. I’d like to see how the upgraded quad board looks. Smile
(no more pinwheel-shaped beam, I would imagine)

BeardedRaleigh
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is it just me or did this thing come out of nowhere? no buildup or anything, just BAM here is a badass light.

Slow is smooth, smooth is fast.

ToyKeeper
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BeardedRaleigh wrote:
is it just me or did this thing come out of nowhere? no buildup or anything, just BAM here is a badass light.

Yeah, pretty much. Nobody had even heard of it until a couple weeks before the first batch was finished.

I may have to see if I can get Hank to participate on BLF a bit more, and tell people in advance when something cool is coming up. It’d probably sell better if people knew it existed.

mattlward
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Hey TK, I bet you are right!

EDC rotation:
Convoy S2+, 6*7135, XM-L2 3D, 10 degree TIR, PilotDog lighted tailcap.
Convoy S2+, H17F, XM-L2 4C, lighted tailcap
Zebralight SC52w-L2
Zebralight SC62w
Olight S1A
Olight S1R

rizky_p
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i thought i was the only one Party anyone knows when the next batch will be?

BeardedRaleigh wrote:
is it just me or did this thing come out of nowhere? no buildup or anything, just BAM here is a badass light.
patmurris
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I’m watching http://intl-outdoor.com for this light to be available…
Any idea when?

Joey Adams
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TK if you happen to speak with Hank, would you mind asking if he has any idea when his Emisar D1s compact thrower is to be released? Tell him inquiring flashaholics want to know:-)

Joey Adams
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I just checked mountains website again and it appears the price has increased by five dollars to 40$ for the non xpl hi versions (xpl hi is now 58$). Perhaps because of how awesome this new firmware is. Certainly worth the price as far as I am concerned.

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Why not offer a pre-order on the site (http://intl-outdoor.com ), so we don’t have to keep checking it several times a day for the arrival of the D4?

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RollerBoySE wrote:
Why not offer a pre-order on the site (http://intl-outdoor.com ), so we don’t have to keep checking it several times a day for the arrival of the D4?

+1
Is a Nice light with incredible interface (I love the ToyKeeper work!)…but I hope not increase more and more the price….

sp5it
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Because of hype Smile
Wait a few more days, price will increase again.
Mike

When you’re born you get a ticket to the freak show. When you’re born in America, you get a front-row seat.

 

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I’m waiting for the D7 to release!

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Edness wrote:
I’m waiting for the D7 to release!

Same here! Really curious for the details… Big Smile

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Sad news. $45 to get 18350?
More than I was hoping for…but I think I’ll get one nevertheless.

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TK
Can you please explain what the mode tactical momentary is?
Thanks

PBWilson
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It’s a setting that shines only when you press and hold the button. You can do morse code with it (if you know morse code, that is…).

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Checked tracking number today. My Emisar D4 should arrive Friday! Can’t wait. Cool

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bwl123 wrote:
Can you please explain what the mode tactical momentary is?

Tactical (momentary) mode makes it act like a 1-mode light which is only on while the button is pressed.

Mostly.

It can still access battcheck and beacon and stuff from that mode. Normally I’d expect a momentary mode to get “stuck” once entered, so that the only way to exit is to loosen and tighten the tailcap, or to have only one button-press sequence which does anything special — a sequence used to exit the mode. But this one also has battcheck on triple click, lockout, etc. So if you do Morse code too fast it could start blinking out the voltage.

I thought it was weird, but the changelog suggests it was done that way on purpose, so I left it alone. I wasn’t a part of the original design discussions, so I don’t know why a lot of things were done.

Trevi_lux wrote:
Is a Nice light with incredible interface (I love the ToyKeeper work!)

Thanks, but most of it was Tom. I only added thermal regulation and some UI tweaks:

Tom
TK
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tekwyzrd wrote:
Green tube and bezel + copper head + unglued boards = I’d buy it NOW!

+1………. that’s what Im talking about
C

Im not a Pessimist …. just an Optimist with a lot of experience

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I suspect the extra $5 at MTNElectronics is due to Richard reflashing to version 2. This takes time, and time is money. $5 is very cheap to open up the light, reflash it, test it, reassemble. We’re all lucky Richard doesn’t make us pay for his BAR exam.. Wink

Cheapest monies you ever spent dealing with a lawyer… Guaranteed! Big Smile

Dale

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I’m not a fan of solid copper heads like on the Manker lights.

Copper is very heavy. It sits solid in the pocket and I feel it when I walk. I find my manker E14 and E14 II to simply be too heavy for pocket EDC.

It’s even worse for side-switch lights. Having a one-piece copper head is great at getting heat away from the LED to the outside of the head. But it’s counterproductive when doing so means that the head of the light instantly gets burning hot to the touch right where the controls are.

Aluminum is worse at transferring heat than copper, but frankly I’d rather have the LED get hotter and allow me to run the light longer before the exterior of the light gets too hot to touch. LEDs are tough and they can take a lot more heat than my thumb can.

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I have no idea what some people nowaday’s would have done had they lived in the mid to late 1800’s. Few bills for currency, heavy silver coinage with the weight of Gold if you were fortunate enough to be rich. A few gold pieces in the pocket, to go with the pocket watch and heavy gold chain it was on, a fellow really needed those suspenders! I guess he could then pay someone to wear a carbide lantern for light…..

Dale

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The copper can hold more heat, which allows the light to run on turbo for a longer time before step-down. It won’t really increase the brightness post-stepdown, but it should at least last a little longer before reaching the lower level.

OTOH, wicking heat away somehow will make a lot more difference than using a copper pill section. One of the most entertaining tests I’ve tried is to touch the pill with an ice cube while thermal regulation is active. The ice cube quickly forms itself to the metal, while disappearing. It looks almost like what happens if you touch cotton candy to a pool of water.

Anyway, touch some ice to the pill and it can make the entire light get cold to the touch… pretty quickly. It shows just how good the thermal properties of aluminum are. Meanwhile, the driver reacts within seconds and starts stepping back up. It’s kind of fascinating to see. The step-up is intentionally slow and gradual, but it should keep going until shortly after the ice is removed.

Last night I tried some thermal tests on a Convoy S2+ triple with Crescendo. After melting some ice on it, the bezel was in a small puddle of water about 3mm deep. I didn’t really think anything of it, but the step-down stabilized almost twice as high as it had been before. Then I soaked up the water and let the test continue, and it stepped down to the original level again. Apparently a few millimeters of water at the front end of the bezel was enough to double the stable level for regulation.

That code isn’t released yet though… I have some bugs to fix first. It worked fine in the D4, but it’s behaving a little weird in Crescendo.

ToyKeeper
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DB Custom wrote:
I suspect the extra $5 at MTNElectronics is due to Richard reflashing to version 2. This takes time, and time is money. $5 is very cheap to open up the light, reflash it, test it, reassemble.

You’re probably right. It can’t be much fun taking those apart to reflash them. I still haven’t taken the driver out of my green one; have been waiting until the firmware was confirmed to be actually final with the updated version available on Hank’s site. I don’t want to open it more than once.

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How about an open weave Kevlar glove with strands of copper woven through it? Carry the light in Turbo mode, the glove acts as an active passive heat sink with so much more surface to air structure that the light could run til the cell dies. Just a thought.

Dale

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ToyKeeper wrote:
The copper can hold more heat, which allows the light to run on turbo for a longer time before step-down. It won’t really increase the brightness post-stepdown, but it should at least last a little longer before reaching the lower level….
True. But I feel very uneasy when the head of the light is burning hot. Especially when the switch is mounted on the head so that heat can’t be avoided. My Manker E14II can run a decent period of time at max turbo due to its copper head, but that doesn’t help me when the head is dangerously hot to the touch.

Thermal transfer of heat from the LED is nice, but I don’t want it to be too nice.

A year or two ago I modded a DQG Tiny III 18650 with triple XPL HI and a FET driver. The head got burning hot to the touch in a matter of seconds. This felt completely unusable to me even for short burst use. I added an aluminum heatsink around the head. This helped… but not much.

I then painted the head to match the coloring of the anodizing on the body. And in an attempt to keep the paint on I laquered the heatsink with brush-on super glue. This helped a lot mainly due to the insultation caused by the layer of plastic from the glue. The metal switch still got too hot too fast so I built a new housing from it out of Sugru synthetic rubber. Now the switch could be touched even when the head is hot.

So what was the result of all the mods to that DQG?

  • It looks like crap – yeah yeah… superglue, paint and sugru is definitely not aesthetically pleasing.
  • The LEDs stay hotter longer. The insulation on the outside makes it harder for heat to get out of the light.
  • The head stays comfortable to the touch much longer. When it does heat up, both the head and body seem to heat up at the same rate. Instead of only being able to run the light at 100% FET output for 10 seconds on a fresh 30Q I can now run the light for about 1 minute, without burning my hand. To me that’s a big improvement.

In short, heat transfer is all well and good, but ergonomics and hand-safety shouldn’t be neglected. A full copper head in a hot-rod light might be fine … but only if you have some kind of insultating plastic or rubber cage to keep your hands from touching the hot parts. Maybe someone can make a safety cage on a 3D printer for the Manker lights. Maybe a cage could be jury-rigged from Sugru.

I’ve tried copper, brass, aluminum, steel and titanium flashlights. Personally I think aluminum is the most useful choice of materials, though for lights with pills I prefer a copper pill.

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Awesome upgrades Toykeeper! I’ll definitely order one soon. Likely from hank due to shipping costs.

ToyKeeper
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… or instead of sacrificing the flashlight to save the user, maybe it could use regulation, thinner wires, or moderation so it doesn’t get scorching-hot in the first place? This way, it wouldn’t hurt the user or the flashlight.

If it’s too hot to touch, it’s probably too hot period. Incandescent lights may operate at 5000 actual Kelvin, so insulation is appropriate for those… but LEDs die faster the hotter they get.

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ToyKeeper wrote:
… or instead of sacrificing the flashlight to save the user, maybe it could use regulation, thinner wires, or moderation so it doesn’t get scorching-hot in the first place? This way, it wouldn’t hurt the user or the flashlight.

If it’s too hot to touch, it’s probably too hot period. Incandescent lights may operate at 5000 actual Kelvin, so insulation is appropriate for those… but LEDs die faster the hotter they get.

I’ve never had an LED in a light die from too much heat. I tend to go on to the next LED light toy before that happens. As long as my LEDs aren’t getting so hot that the solder melts I’m fine.

I’m also not a programmer. In the DQG I was using a driver with moppydrv firmware with a programmable stepdown. Only problem was the stepdown only went to 50% FET, and in that light even 50% was too much for extended use. I either need a rampdown to 20% or I need a temp sensor.

On the upside, it looks like RMM may start selling drivers with the new firmware on them in different dimensions. So hopefully I can replace the drivers on all my old e-switch lights with drivers with your new v2 firmware Smile

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DB Custom wrote:
How about an open weave Kevlar glove with strands of copper woven through it? Carry the light in Turbo mode, the glove acts as an active passive heat sink with so much more surface to air structure that the light could run til the cell dies. Just a thought.

Oh to be a fly on the wall inside your titanium supported brain!

Im not a Pessimist …. just an Optimist with a lot of experience

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