Thanks.
BST18 and BST21 are E-switch only with Anduril 2. BST15 has additional support for MikeC’s firmware which supports clicky, E-switch and clicky+E-switch. His firmware isn’t finished though, he’ll probably resume development if I send him a bunch of BST15s.
It also has an off time capacitor emplacement, so it could work with an OTC firmware, that is if DAC and HDR support is added to the OTC firmware.
Awesome work 
If anyone has any of them for sale, I’ll be in.
Nice work!!!
Thanks for the compliments 
I installed one on them in a PL09 Quad with sliced 519A and AUX LEDs :
I transformed the MCPCB to 2S2P by cutting the trace between D2 and D3 (the line on the right is just some removed soldermask) and by creating another solder pad for the + wire :
I used a flex PCB I made for the FWAA before because I didn’t want to wait for a proper one made for the PL09, hence there are only 3 LEDs :
Though once the optic is on it’s not obvious where is the missing one :
Min level (70uA), could be lower with some tweaks but it’s low enough IMO :
Color measurements on level 7 (0.75A per LED) and turbo (3A per LED):
I’m very satisfied how it turned out, I really like this host and the beam is like pure neutral white for me.
Very well done, that looks amazing!!
Very nice!
Thanks 
Another kind of magic 
When I see those tiny wires, I know magic is happening 
Well done
It’s not dark magic like Tterev3 and his enamelled wire wizardry, but yeah I like using those wires, they take so little space that they can be comfortably long.
BTW Haukkeli Assembled two BST21-KRx , please check it out. He’s sort of my beta tester and I believe that was his first time assembling a PCB, demonstrating that it’s definitely doable to assemble them with just previous reflowing experience.
It would likely be a bit expensive to be a beta tester across the pond.
I’ll keep hitting a daily F5 on you Oshpark, then…
What’s delaying publication is more the shortage, I had to send a crucial component to Haukkeli so he could build them, there is an alternative but it’s not my preference (the ramp table would need to be changed and I don’t really want to have to manage a lot of firmware builds for everyone), digikey announces availability for early October, Mouser did too then pushed it back to December (and before that it was July)…
The Attiny1616 is also not available from the usual sellers, though LCSC has 6000 in stock, Digikey should get a good quantity in October.
Oh I also would like to find a name for them, but I’m quite uninspired :person_facepalming:
FreeBoost HDR (by thefreeman)™
Not managing that many firmware builds makes perfect sense. And the chip shortage is what it is - I was supposed to get a Fireflies T1R from an OL contest not last year, but the year before. They still don’t have the drivers so I finally had them ship their newish 21700 Quad instead.
TheFreeman- this is such an exciting build for me to see, for many of us FireFlies I'm sure. I have the new PL09"Q" and I love the host size and battery compatibility, but mine has very Hi PD with the aux on high mode (orange), and they're imperceptible on low. Anyway, more importantly, a buck-boost driver we can make soon!
So I have been feeling stale in my current state of modifications (swapping drivers and LEDs and the usual intermediate-level shuffle of mods), and I'm no wizard and have never flashed a firmware on a light, but I am Very much anticipating building some of these drivers of yours, when that is available.
is there anything you could guide me to for a "parts list", I am sure you already mentioned it but it probably went right over my head lol.
Am I correct in understanding that OshPark will have thee available for printing soon? But not right now?thanks again!
this is excitement I haven't had since my first couple of months in the hobby.
I’m glad to see that you both are motivated to assemble some drivers 
HI PD ?
I’ll share OSHpark and Aisler PCBs, the ones I used here are from Aisler (Germany), with part lists and instructions, a ramp table calculator and Anduril source code of course, with a few compiled builds (.hex), although I would encourage people to setup their machine for compiling Anduril and making their own tweaks.
So stoked to read this. Can’t wait to build up a few drivers!
Very keen to try my hand at building this also
Yup, I’ve seen his mods with those wires and my eyes crossed 
I still like to acknowledge that these “tiny” mods are something spectacular for me, hence my words
I’ve seen Haukkeli’s work as well and it was well done. Umfortunately I am not that good with reflowing nor with the “tiny” things like components, etc, so I guess I will only be a spectator
BTW, I have a TS10 on the way and will hopefully test your programmer :partying_face:
PD is Parasitic Drain, I think
Meet the most powerful and efficient Nimh/li-ion boost driver in existence :
3 Thanks
Wait, WHAT????