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Old 02-28-2016, 01:32 AM #1
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Cool Custom Build Nichia NDB7875 in C8 Host

Hello Guys,
i want to introduce you finally my finished Build .
Here are the List of the Compontents i Use:

- Nichia NDB7875 in Copper Module with G2 lens
- Super X Drive V3 Buck
- Efest IMR 18350 V2 800mAh
- Convoy C8 Flashlight
- Custom Heatsink
- Eagle Pair 190-540nm safety google OD6+ cause safety First
- Extendet Focusing Ring
- Custom Handmade Lanyard from me with 550 Paracord

I think i need no explaination of the Diode, Module,Batterys and Safety googles.

The Super X Driver was Thermally attached to the Heatsink with Arctic MX4 Thermal Grease which i use for every thermal attachment . For fixing it, i put little dots of 2k epoxy on the sides of the Driver.

For the Contact Board i took an Nanjg 16mm Driver and cut all interconnects with the Dremel. Only Thing i left there was the Negative pads of the AMC chips which i Bridged for Better resistance. After that i drilled a small hole for the Positive Wire to the Brass Pill which my Friend also machined me.

the interesting thing is the Heatsink. It is Machined out of Aluminium, then little "cooling" fins was milled in and then filled up with a mix of 2k epoxy and GITD powder. After that the Aluminum was Drilled out for Pressing a Copper shell in. The Copper shell was now drilled to 12H7 with a reamer for a nice finish. After that the set screw was placed with a milling machine. After all it gets a nice polished finish but at assembly i put some scratches in... But you guys know that stuff to well ..

The Host is an normal Convoy C8 Flashlight with integrated Head. The spring on the Tailcap was bridget with silicone Wire 0,25 mm˛ and the Complete Soldering was done with Sn99Cu1+ML. I Switched the O rings and Tailcap rubber to a Green GITD for nicer Look.


At the first current measurements at the Tailcap it Draws about 1.8A @ about 8,4V . seems to be ok

But at the first outside test without googles and good caution. "My Eyes just pop out " It is many better and nicer then i tought. Im so completely happy with this Build its soo fun. Nice Beam , cool Look. More then i expect thank you all guys for helping me.

a special thanks for DTR and Survivallasers for giving me good Quality parts really Fast. And enable me this nice build.


But enough words, i let pictures speak





































BTW: All Units are Metric
Thank you Guys,
Hope you enjoy it i do
Best regards
Nico



Last edited by Nexxos1412; 02-28-2016 at 01:34 AM.
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Old 02-28-2016, 03:24 AM #2
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Default Re: Custom Build Nichia NDB7875 in C8 Host

Good looking build Nexxos; I really like your custom aluminum/copper heatsink, nice work!
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Old 02-28-2016, 03:42 AM #3
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Default Re: Custom Build Nichia NDB7875 in C8 Host

nice build
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Old 02-28-2016, 04:25 AM #4
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Default Re: Custom Build Nichia NDB7875 in C8 Host

Wow, great job! I owe you a +REP when I can, I'm fresh out! I love that custom heatsink that's beautiful. Do you find you get better thermal transfer when using Arctic grease and epoxy instead of Arctic thermal adhesive, or never tried it?
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Old 02-28-2016, 06:28 AM #5
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Default Re: Custom Build Nichia NDB7875 in C8 Host

Wow nice build / need to spread some rep
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Old 02-28-2016, 02:10 PM #6
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Default Re: Custom Build Nichia NDB7875 in C8 Host

Hi Nico,
Great combo with the sink and host and also the 7875/SXD in line @1.8A. I set my SXD's for the 7875 @ 2.4A and wow what a power house for that diode. The host you used is perfect for that build ,i have many like that but they are side button which i like but can't find them anymore they were the C11's for 2-18350's or 1-18650 cells. The duty cycles for your build will be very long with that sinking so don't be afraid to use it .and your only running it at 1.8A so no problems with that Buddy..= Rep+

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Old 02-28-2016, 02:51 PM #7
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Default Re: Custom Build Nichia NDB7875 in C8 Host

Hello,
Thanks for the flowers guys
I took thermal grease because the heat transfer should be a little higher and in this case I can just cut the little glued points of the edges from the driver and can use it in another Build if I ever want it . And it's a lot better then these thermal pads .

I measure 1.8A at the Tailcap so with 2S Liion setup. The Driver is a step down so it steps the 8.4V down to around 5V for the diode. At the diode there should be 2.4A because it's a 2,4A super x Drive , will maybe measure it today with my current clamp meter .

Thank you all, nice Forum here, also thanks for help in safety questions. It's now exactly what I want from the hobby. A nice, good quality ( with selected parts I choose) Laser build. And I feel so comfortable and safe with my eagle pair, it's worth every penny . No headache or eye dryness or so . And this will not be the last build . Fits perfectly with my expensive flashlights



By the way, I don't know if this is a stupid question but at around how far a direct look into the beam can cause damage? . I mean like 100, 200 meters or so. I ask because when I shine in the sky ( only when there are no animals or airplanes visible) if I accidentally hit a flying bird which I don't see in the night. Sorry for this maybe stupid question but I just keep an eye on my environment.

Nest regards from Germany
Nico
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Old 02-29-2016, 05:13 AM #8
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Default Re: Custom Build Nichia NDB7875 in C8 Host

a strike from laser beam at any distance will cause eye damage...
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Old 02-29-2016, 07:30 AM #9
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Default Re: Custom Build Nichia NDB7875 in C8 Host

Hello,
Thanks for answer. Then I have to look carefully for Birds . yesterday I measured the current at the Diode and it was exactly 2.41A Measured with my UNI-T clamp Meter . Works well

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