he uses a Maxim with integrated reference that has a parasitic drain 2-3 times more than my solution
I asked him if I can use his board as a starting point to do my own, but I ended up making some things differently including another comparator(mainly because its cheaper and lower standby drain)
it look like that is the older version when I order part. The rev B use only one voltage reference and two comparator I see for 5.5uA standby current (from page)
How does that work? TIR board positive direct from LED+ and the ground from the FET drain? FET gate controlled by the MCU aux LED output?
Hello Mr. Lexel,
I am trying to add some side light to my flashlight. You seem to have a lot of pretty color led. Can you please share us the part number for the led colors you are using?
green
blue
ice blue
pink
WW
red
CW
orange
yellow
emerald green
purple
Thank you Mr. Lexel!
EDIT - sorry for asking question, I found answer on aliexpress!
https://www.aliexpress.com/item/10Valuesx100pcs-1000pcs-0603-Ultra-Bright-SMD-Red-Green-Blue-White-Yellow-Warm-White-Orange-Pink-Purple/32358219506.html
Thank you
I order from this Aliexpress shop
https://de.aliexpress.com/store/1758868?spm=a2g0x.10010108.0.0.456e161fGJcOHi
but you can not except same efficiency or colors over different orders they seem to change
red and green latest batch were less efficient and Pink color changed less purple but more efficient
Will this board with only red aux on full power produce enough light tu use it as a usable moon mode?
Not with a reasonable standby current
I finally got my board installed in my D4. I like it!! Not easy to install, but not that much harder than flashing my D4 with Anduril.
Does the D4 board fit any 20mm quad mcpcb or does it somehow only fit the D4?
Yes!
I used LED4Power Quad DTP Board
I should fit all 20mm quad boards which are quad TIR compatible, as this ensures the same hole spacing
I dont think it makes a difference that it’s a D4 but the tolerances for where the LED +/- are may not work for anything but a Noctigon 4XP. I guess YMMV. Maybe Lexel has tested others.
Edit: I see it works on L4P board. Looks less likely to work here:
true. That I did not think of! Sorry for my misleading post.
Perfect, thanks guys!
This is… seriously intriguing & inspiring. 
I wasn’t going to go with an Emisar… have Fireflies E07 on my horizon. If there’s definitely not going to be one of these TIR boards available for the E07, then I may have to shift gears. 
technically you dont need to screw down the aux board,
having it simply floating between optics and MCPCB, a few mm up are no problem to get the L4P board soldered,
you could also use some 3mm hole spacers to lift iut but got it screwed down
the E07 has already my board in the stock light, so there is no real need for me to order this board size
with LVP D4S, ROT66 and MF01 aux board from me available
D4 is simply stabilized with LDO, but can be build also without to support low mode
Really nice boards 
But tbh a lot of this goes over my head!
I disassembled my D4 recently to flash Anduril and found it very tricky to work with given the extremely limited space. I’m not sure I’ll have the skills or patience to take it apart again to add the aux cables. I really like the aux leds in my D4S though so I could be tempted.
The D1 TIR looks interesting as well. Do you have any more info on that?
Any plans to make one for the imminent release of the FW3A? 
D1 is not TIR its reflector with aux boards placed inside the gasket
I sanded that board to about 0.1mm thickness
the board with indirect gasket leds is not tested yet
Send me one and i’ll destroy my D1 for science:
LED Light Pipe + Dremel + UV Glue = ???
its meant to indirect light the white gasket
direct light version looks like this
I know, but why let it go to waste? The D1 doesn’t get that hot anyways I can make some holes, lol
edit; I mean in some cases they help cooling too…