I assume so, and thatās what I was thinking of doing for some other lights, the via for the switch ring seems to start here :
Probably a bit small for soldering a wire there, but there is a tiny bit of space up north without components (blue) to make yourself another via.
Or even better loneoceans could add a solder pad for the switch, unused for the FW3X, but would allow to use the driver for other lights where it fits.
It is possible to use this driver in flashlights with 22mm diameter driver cavities - just make sure that the shelf and retaining ring fit the driver and don't hit other components. Afterall, the Lume1-fw3x was designed specifically for FW3X flashlights only. thefreeman is right that you can solder the e-switch wire where the red arrow is drawn in the diagram. Perhaps more designs will be made for other flashlights in the future.
As for springs, yes, since Neal / Lumintop is fabricating the drivers, they will be able to use the same spring as the stock FW3A driver. It'll be nice if they sold the springs separately too, since I think they're the perfect size and profile for many small drivers. Individual drivers sold by Neal will of course come with a spring
Finally for AUX LED boards, I'm working with Neal to find the best way to get these produced. Most likely it'll be the RGB AUX boards - for the tri-LED boards, different LEDs will require different series resistors, and I'm not sure what the best solution is to sell that since there can be so many variants.
If I may I have one minor comment about your design. Iāve noticed that your pads for pogo key have switched places for mosi and miso against already standardized pattern. Look like you can easy fix this to be in line with other drivers on the market.
I would love to see another version of those efficiency plots done with a triple Nichia/Samsung/Luxeon/SST20. As you know, the single XM-L2 is the worst case for buck-mode efficiency and also and unlikely case for the application. Boost-mode might reach the full 3A @2.7V too?
You knowā¦ I just now noticed that there isnāt a flat notch on this driver to match the FWs driver cavity/ledge. Am I missing something here? Is it not needed? Or perhaps is this a feature thatās not on the copper model that caused a minor oversight in the pcb design?
Yes the current iteration of the driver PCB is indeed round, because of the specific flashlights I have tested with. You are correct that the aluminium version (not the original ones, but the standard ones) do have a notch. I'm not exactly sure about the newest ones since I don't have them. The copper version, at least the one I have, does not have the notch. I'm working with Neal to determine what the actual cavity specifications are. Regardless, it's an easy adjustment with a little bit of sanding or filing to get it to fit if the specific flashlight cavity in your flashlight does have a notch. Once I get clarification I'll be updating with more details.
Yes the production boards are updated to swap MOSI and MISO, so it'll be the same as existing flashlights!
Thanks everyone for the great feedback so far, and thanks everyone for your patience.
Just a quick update - the first batch of Lume1-FW3X drivers have been produced. I am arranging to getting some shipped to me so I can validate the build since I have no idea how they turned out yet!
In addition, a lot of people have asked about Aux boards. Neal has produced some RGB AUX boards.
https://imgur.com/po5GYL3
Here's a very quick GIF of what Neal sent over. Tweaking of resistor values in progress for LED brightness. I do not know what his plans are for AUX boards but I see no reason why they cannot be offered for sale as well. Please excuse the odd effects from video to gif conversion.