K75 driver

CNCman · 2019-12-27T00:07:01.000Z

grin:

JaredM:

Does anyone know the Vf curve of this LED? Could we get some measurements from inside the K75?

Tonight or tomorrow I will set it up on the bench and take some more readings.

I brought a second one and plan on scratch building a host with better cooling for the other. Now i have a k75 host thinking an osram LED with L4P driver.

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Is that K75 going to be modded into an infrared light ?
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Redlyne22 · 2019-12-27T02:27:42.000Z

So this mean that we can use a normal 1S fet driver, example:(Q8 driver) with the luminus sbt90.2 LED?

KawiBoy1428 · 2019-12-27T02:51:27.000Z

I like how they doubled up on the leads to get that current to the LED…. and they also popped the glass/lens off the emitter……

Redlyne22 · 2019-12-27T03:29:27.000Z

Good observation, why do you think they removed that lil window? Better cooling or to allow more lumens to come thro?

KawiBoy1428 · 2019-12-27T03:39:46.000Z

Redlyne22:

Good observation, why do you think they removed that lil window? Better cooling or to allow more lumens to come thro?

yeah… throw… woooo it’s de-domed… :money_mouth_face: Heat not so much these Big Luminus LED’s are current hungry, they pull big amps…and are tough as iron nails…

Lumeniac · 2019-12-27T06:10:14.000Z

btw, do u know if that is possible to add extension here?

if yes, what one will fit?

grin · 2019-12-27T16:14:45.000Z

I took the window off the led
The k75 as a host is light weight with a huge reflector so i will put the 2mm2 osram and led4power driver in it, see how it goes. The astrolux battery tube fits and I have changed the battery carrier to 4s which fit the acebeam tube. However the acebeam carriers dont fit in the astrolux tube

I am waiting for more leds so i will do a test with Q8 driver and the sbt-90 from the k75. I have a host knocked up for test.

The k75 driver and led will go in a aspheric with a collar and 150mm lens with 177mmFL. i have done some tests without the collar and and 145mm lens, looks like it will be alright

grin · 2019-12-27T16:10:53.000Z

LED voltage on moonlight is 2.5v, turbo 3.5v

the4ds9 · 2019-12-28T03:31:18.000Z

Grin’s measurements are right on. The peak is 583 yards away. First beamshot is Mid2 and second beamshot is Turbo.

the4ds9 · 2019-12-28T04:25:59.000Z

Yes this is what I find as well. My low voltage indicator starts blinking when on Turbo mode and my batteries are at 3.5 volts. The light then shuts off completely as the voltage sags below this. I stick the batteries in my VC4 charger and the dial is 3.5v

grin:

LED voltage on moonlight is 2.5v, turbo 3.5v

grin · 2019-12-28T06:49:50.000Z

Haha it is a crazy light I was playing with it at work lighting up caravans over 2km away.

I dont really have a use for it so i havent flattened the batteries yet.

Redlyne22 · 2019-12-28T07:03:55.000Z

What the!!! This thread went from informative to straight entertainment. That is a killer beam!

FlashPilot · 2019-12-30T09:30:27.000Z

Haha! Holy mother of pearl… I love it! Just spray black paint and you’re done!

Sirius9 · 2019-12-31T18:32:20.000Z

I think tripod stand option will no longer work as intended

CNCman · 2019-12-31T20:33:41.000Z

grin:

I took the window off the led
The k75 as a host is light weight with a huge reflector so i will put the 2mm2 osram and led4power driver in it, see how it goes. The astrolux battery tube fits and I have changed the battery carrier to 4s which fit the acebeam tube. However the acebeam carriers dont fit in the astrolux tube

I am waiting for more leds so i will do a test with Q8 driver and the sbt-90 from the k75. I have a host knocked up for test.

The k75 driver and led will go in a aspheric with a collar and 150mm lens with 177mmFL. i have done some tests without the collar and and 145mm lens, looks like it will be alright

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I’m trying to learn here, can someone Please explain what is inside the light. . :question:
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KawiBoy1428 · 2019-12-31T20:45:29.000Z

CNCman:

grin:

I took the window off the led
The k75 as a host is light weight with a huge reflector so i will put the 2mm2 osram and led4power driver in it, see how it goes. The astrolux battery tube fits and I have changed the battery carrier to 4s which fit the acebeam tube. However the acebeam carriers dont fit in the astrolux tube

I am waiting for more leds so i will do a test with Q8 driver and the sbt-90 from the k75. I have a host knocked up for test.

The k75 driver and led will go in a aspheric with a collar and 150mm lens with 177mmFL. i have done some tests without the collar and and 145mm lens, looks like it will be alright

.
.
I’m trying to learn here, can someone Please explain what is inside the light. . :question:
.

Looks to be … a home made version of one of these…https://meadowstar.com/rltproducts/rlt-retroreflectors/

grin · 2020-01-01T17:36:23.000Z

Sorry for the delay replying I have worked every day over the christmas break and havent had any time to do anything.
It is a stainless steel butt weld dome endcap that has been polished, the opening is not the right size because it is one that was already cut for another use. the idea is the light that doesnt hit the lens is reflected back to the light emitting surface and increases the intensity. I have a thought that more than one led can be used but the extra leds are blocked by the aperture so that only the centre is exposed to the lens. the inverted reflector may have to be a different shape to properly focus the extras.

Redlyne22 · 2020-01-03T06:09:55.000Z

grin:

Sorry for the delay replying I have worked every day over the christmas break and havent had any time to do anything.
It is a stainless steel butt weld dome endcap that has been polished, the opening is not the right size because it is one that was already cut for another use. the idea is the light that doesnt hit the lens is reflected back to the light emitting surface and increases the intensity. I have a thought that more than one led can be used but the extra leds are blocked by the aperture so that only the centre is exposed to the lens. the inverted reflector may have to be a different shape to properly focus the extras.

Tried a couple times to make a collar’ once with glass and once with metal, Failed misrabley both times. This is no easy thing to do.

So you are getting a focused mirror image of 1 LED’s die surface back onto the led?

grin · 2020-01-03T08:32:29.000Z

I think you are right the stainless endcap doesnt focus a clear image, but it is worth a try. Sometimes you have to spend a bit on materials and tools to get results.

the4ds9 · 2020-01-03T09:01:27.000Z

The K75 Acebeam is really a monstrous throw. I carefully and painstakingly looked through 20x50 Bushnell binoculars while shining down a straight runoff Wash that ended in an airport hanger. The distance was easily half a mile; could be as much as .6 mile or more.

I could tell the scattered cool white light of the K75 reached the very end of the wash and then a large shrubbery or tree beyond that, poking up higher than the hangar building. Not bad for LED.

Flashaholics Youtube video accurately portrays K75’s reach!