What did you mod today?

It is not the UV that gave you headaches but the 450nm blue light. Eyes are very insensitive to 450nm so with a lot of it you still do not see it very well, while your pupils adjust to the amount that you see and not the optical power and thus are wide open.

And isnā€™t 450nm blue light UV light? According to research online ā€œThe Phosphor white method produces white light in a single LED by combining a short wavelength LED such as blue or UV, and a yellow phosphor coating. The blue or UV photons generated in the LED either travels through the phosphor layer without alteration, or they are converted into yellow photons in the phosphor layer.ā€ Technically UV stops at 400nm, so weā€™re splitting 50nm of spectrum and counting on the emitter manufacturer to get it right, for the most part.

So it would depend on the particular emitter as to whether or not the base output is in the UV spectrum or merely the blue light spectrum.

Potentially dangerous (or at best hazardous), regardless, so care should be taken to discard a damaged die.

All commonly used white leds in flashlights use 450nm blue leds under the phosfor. They do not emit UV.

Only a handful leds use a 400nm base led (best known are VTC-series Yuji leds) but those are all low or midpower leds so not found in flashlights (except that one or two BLF-weirdoā€™s made a flashlight out of them).

And recently Nichia used a 420nm base led for the cool Optisolis leds, also midpower and build into a few flashlights by BLF members suffering from tint-OCD.

A 2 in 1 tonight.

Nitecore Cx6 (this particular one started out white / red), it now sports a XP-L and a green XP-E2 cause thatā€™s what I had laying around and I like building them as much as using them. I plan to get a PC amber XP-E2 next parts order and replace the green one then.

The color led driver is my last BLF-SK68 board, the white driver is a blf-17ddv3. These are my last two 13A driver builds!

Both run modified versions of TomEā€™s e-switch13 FW.

First we strip the factory driver and hook to the switch pads, while youā€™re at it find batt+ and GND on the factory driver contact plate.

Go ahead and sandwich those in there

Do some things here


Pry up the FETā€™s gate and add a 130ohm resistor cause for some reason the 17dd interfered with the other led on medium and high (but not ml, low or turbo) and started LVP ramp down immediately without it. The gate resistor fixed that!

*correction, lvp ramp was because R2 wasnā€™t grounded for some dumb reason

Glue is drying in the head, probably be tomorrow before I can wire the emitters up.

Oh my, I hope to learn enough one day to do things like that. Skill from experience has turned to Art for you, sweet :beer:

:beer:

I am amazed at all the modding experience going on here. You guys are Good. So much to learn about drivers, I will try to keep up. It sure is tiny for 13A. You sure that may be a World Record tiny high amp setup ? Wow !! :beer:

This evening I soldered a loop into one of the triple boards to check current at the emitters, each board is pulling 14.53A for a total of 58.12A, an estimated ~188 Watts. :wink: Each Samsung W6 emitter is pushing 1460 lumens for 17,526 lumens at start on 4 Samsung 30Q cells.

Makes for one CRAZY lightning show! :smiley:

I couldnā€™t agree more with you CNCman. And that goes to the program creators for these drivers as well.

Not today but added a lighted tail switch to the FourSevens Mini ML Ti Triple Nichia 219C 5000K.

LD-A4 3A driver - Start around 1800lm DD 60Ā°C, 320lm stepdown 25s. 942lm CC 60Ā°C, 270lm stepdown 60s.

White LED's under the green GITD silicone circling the reverse clicky titanium switch cover.

.

New GITD titanium switch cover for the FourSevens PK Paladin Triple XP-G2 3D.

FET 15+1 driver, reverse clicky tail switch - Start around 1900lm DD, 928lm stepdown 30s.

Fantastic CRX. Man I like that mini.

Yeah that is a nice one :beer:

I wish I had your smarts CRX. :beer:

Not so smart, just perseverance :slight_smile: :beer:

ā€¦and a certain amount of talent, an eye for detail plus a sense of craftsmanship.

Hard to argue with this. :slight_smile:

:blush:

We would Love to see some pictures :beer: :beer: :beer:

Be careful, thatā€™s enough amps to Weld Steel with !!!

I lost with this , I need to back up to the beginning of your mod to understand what your making.

Not ā€œtodayā€ butttt

Built a PD68 tripledown board. Still a bench project but I do have one in a light but it is just pressfit and not soldered in yet. It runs Bistro-HD right now. Still yet to settle on mode groups and actually build them out.

The cut in the PCB is intentional

Reflowing the LEDs

unlit

small 7135 channel

big 7135 channel

FET

Bistro-HD ramp ā€œstrobeā€ snippet

This is awesome.
I believe you filed the MPCB and optic to fit into the head?

Yes, MCPCB diameter just over 18mm to fit. The pill has some extra copper added too.