Looks and sounds great!!
Wooohooooo!!!
Yes!
I am more interesting do you will share whole Altium project or only OSHpark PCB. If you post schematic will be also great if that project is trully OSHW at all.
This is looking great!
Was hoping I could use it in my EDC18, they said it was the same driver, but major issue with the board mounted switch, for one thing:
That little 0402 resistor on the top center is a 20K for the green 0402 LED under the black switch (not visible). It connects straight to Batt+. Plan is to remove it and swap in a 0603 resistor, maybe ~10K, and wire it to spare pin #7 so it can be controlled by Anduril. Not enough pins for your RGB board though 
.
The rest are our standard BLF driver design by DEL (not seen here much anymore). We often forget around here that BLF user DEL is the one who came up with this improved design, added the 4.7 ohm R3, The R1 and R2 for the FET, and the C2 cap. The FET gate resistors are pretty standard, but specially the R3 prior to the diode, and the C2 cap made a huge difference is stability for the ATtiny 25/45/85's.
Any chance you’ll make an HL03 version? It has a switch mounted in the middle of the board
Hello all,
Just a note that I have started an official interest list for a group buy!
If you are interested, please sign up here: https://budgetlightforum.com/t/-/61834
Thanks to everyone on this forum who have provided great feedback, comments, suggestions, ideas, and support. I'm currently busy working through a detailed datasheet and documentation for the driver and the firmware, so please hang on.
Meanwhile, details of the upcoming group buy are listed in the thread above.
TomE, I get a fair number of requests to build drivers for different flashlights but I only have so much time to work on drivers, and it's a fair amount of development time, effort, and cost for me to purchase my own flashlights etc. So unless the demand is very high, I can't commit to working on different variants. I hope this is understandable. For example, I've purchased 3 FWxx flashlights at my own cost just for the development of this driver, and unfortunately I don't get any sponsors 
Thanks all!
The 21.7 mm driver could probably have fitted a number of lights if it wasn’t designed for the non standard double tube design of the FW3A. (H03/04 would fit by filing it down to 21.3~21.2mm).
Maybe Lexel could make variants of this driver since it’s opensource, and would replace advantageously his linear+DD driver offering.
have you made and video of the flashlight running with the aux leds!
Kaidomain has a new spring for sale. It’s rated for high current and is 6x15mm so it should work with a little cutting and bending.
http://kaidomain.com/S028735-6mm-x-15mm-Gold-Plated-Bronze-Spring-Battery-5pcs
I’m quoting from the group buy thread, but I think the discussion is more apt for here:
What are your plans for the design after the group buy? Will you just be selling unpopulated boards, or are you considering offering the design either for license or open source publishing? This seems like it could be a good option for some of the custom flashlight manufacturers, who generally use linear + FET drivers.
If the design can be fit in a 17mm footprint (might need to be double-sided?), it should be reasonably easy to adapt to many other lights by sizing the PCB and body contact ring appropriately without re-arranging any of the components.
If the community can also get Bistro working on it, then that can include clicky designs like the Convoy S2+, which is really a great host for a first-time builders. There’s already lots of driver options for that light, but as far as I’ve seen, the buck-boost options tend to have very simple UI’s.
Just put my name down in the interest list.
I’ve skimmed over the pages but I haven’t seen a runtime graph yet… It’ll be nice to see one of those to get some indicator of thermal performance and efficiency.
hi, loneoceans
i don’t know if this was asked before,
are you using toykeepers latest anduril fw3a revision ?
and if there comes an other revision, can we use the original fw3a.hex file to flash this driver ?
sorry is this was a repeat question
Interested in 2. Any color. Hopefully I filled out the interest list comment correctly.
Yo can’t. This is based at Attiny1634 code like Emisar D4V2 and Noctigon K1. Original driver is based on Attiny85 MCU.
ok in that case, if there is a updated Emisar/Noctigon file i could flash that to this driver or it needs to be adapted for for this driver ?
Will the Emisar flashing setup work with this driver?
edit Nevermind, saw on the other thread that it will. Yay!
The hardware is different so firmware will be adapted specially for this driver. One big difference is that will support external temperature sensor. When is released the source code we can see what are the difference between them.
Loneoceans, have you experimented with a boost supply for the purpose of running the LEDs in series rather than parallel? It would be a bit less efficient for power consumption but I think it would be more output efficient in terms of light. One low Vf LED in the 3 or 4 paralleled would hog current from the others is my thought.
AmbientSix, a boost driver would likely be slightly less efficient, as the main size limit is the inductor, which there is not much space for in FW3A.
It would be possible, but would be slightly more complex than Buck-boost, and wouldn’t improve efficiency.
Also, power consumption efficiency is directly proportional to luminous efficacy.