I’m hoping, if there is ever a LT2, that it will use a tiny1634 chip instead of tiny85… and hopefully it could also use RGB LEDs in the button. That way, it could indicate battery status by color, on the button. This feature already exists on a few other lights, and it basically eliminates the need to ever use the battery check function. Just wait until the indicator gets low enough to turn orange or red, and then recharge.
I will try suggesting the 1634 to Sofirn/Wurkkos anyway to have some more memory for cool features like multiple moonlight levels as Manker demonstrated in their new lights.
Will the 1634 work more accurately in terms of voltage calibration?
I’m not sure if attiny1634 has more accurate voltage or not… but on my personal lights, I have not seen as much variation as with attiny85. Regardless, Anduril 2 has a voltage calibration feature so the user can correct for any variation in the hardware.
About multiple moonlight levels, that isn’t really a MCU thing… it’s determined by the power circuitry. The LT1 has power channels running at about 1750 mA, and it can run those at 256 different levels. So each step is about 6.8 mA apart, and the lowest step is about 6.8 mA.
However, common FET+1 lights use a lowest power channel of 350 mA… and 350 / 256 = 1.3 mA. So they have better resolution at the low end, and work better at moon levels.
The driver could potentially be redesigned completely so it used constant current without PWM… and then it could use 10-bit control instead of 8-bit. This would provide 4X as much resolution, since it’d be 1750 mA / 1024 = 1.7 mA per step, instead of 1750 mA / 256 = 6.8 mA per step. But 4X isn’t a huge increase.
So an even better solution would be to have an even smaller power channel, so it would give even finer resolution. Like, maybe add a 30 mA channel, and then it would have a ~64X increase in resolution (~0.12 mA per step).
However, since the lantern has 2 (or maybe 3) different sets of LEDs, everything needs to be doubled (or tripled). This restricts the driver design quite a bit. Instead of having a low channel and high channel, it would need two low channels and two high channels… and possibly even more if there’s a third set for red. But the control chip can only do PWM on 4 pins. So we could choose between white-only (with finer resolution, 2x2 pins) or white plus red (with the same coarse resolution as the LT1, 1x3 pins).
So… long story short: It’s possible, but complicated.
Holy crap I have NO idea what you just said. Wow, I think I have grasp how complex this driver/programming is though!
Say…… this is way out in left field but we get up at zero-dark-30 and its ink black here in the forest. Would it be possible to have a wake up timer? Could the light turn on in moon-low at say 0400 hrs each morning?
Not a request just a curiosity.
Not without adding a clock chip to keep accurate time. The timer on these things isn’t very accurate at all. If you give it an 8-hour timer and have it turn on at the end of that time, it’ll generally happen between about 7.5 and 8.5 hours, but that’s about as precise as it gets. And if it tried to track time of day, it’d end up gaining or losing an hour per day, at random.
That’s about as accurate as my nighttime relief trips. 
:+1: 
Great reporting in on the LT1’s long-term performance idahofarmer !
Hi Everyone! I have been absent lately due to many things, especially the last couple months with packing things, down-sizing, ans selling my house. I have a closing date for Oct 15th, and will be moving east to Newfoundland at that time. After i get moved, re-settled in a new place i will returning to here a lot more to continue the LT1 and LT1 Mini Projects. In the mean time, for the next couple months i will be living off-grid in my 23 foot RV trailer, and will create some new offgrid living experience videos. - Dennis
Sounds like back on track, literally! Looking forward to the video’s.
Newfoundland? Just up the coast a ways... Okay, a long ways. I thought Maine was a trek, but look'n at the map, looks like Maine is 1/4 the way to Newfoundland!
The LT1 is cool, but too cool. You'll need a Q8 with quad XHP50.2's to keep you warm 
You’ll need one of these coats.
Good lux for your move to Newfoundland, Dennis! We will be waiting patiently for your return to BLF. Make sure your RV or your new house will always be tied up against those raging ice storms. :-D
Like a Q8 mini furnace!
I live in a van and the LT1 is my most used light. It’s perfect for my needs.
Although, I will upgrade when the 1 x 4680 LT version is released.
Just saw this thread and couldn’t resist. Sofirn just happens to have this onsale, and I have a 10% off coupon. Bingo. Maybe no more gas lanterns for me, too.
You won’t regret it, welcome to the show. 
don't think I ever received my code for the LT1 but that's fine. Any chance one day to possibly program a LVP shutdown at our own selected voltage? I usually don't like to run my batteries below 3.6V and if the lantern had a feature to allow us to adjust this, would be nice. This way if we had it on at night and fell asleep, we could care less what happens as it drains down.
That day could be today, because the lantern has a feature to allow people to adjust that: It’s open-source.
Programming the LVP level only requires changing one line:
#define VOLTAGE_LOW 36
Wow, nice, thanks ToyKeeper! Can you suggest a free linux or window editor and compiler for Anduril?
If you click either of the first two links in my signature, then look at the README file, it has info about getting started. Some of the info in the readme might be a little old though, need to update it, so it may also be helpful to try the steps listed in this post.