Very nice, never bought an E01 because of the UI, but I sure like the size and looks!
Currently working on giving an unreliable crelant v4a a new life. 2s2p 14500, 17mm 2s ta narsil driver from lexel, and 5000k Q0 mt-g2 from intl-outdoor when they were bargain priced. Something to work on while waiting for new reflectors from fasttech and replacement emitter for the L6 from banggood. Will post photos in a build thread in the near future.
A brain fart caused me to think Iād soldered to GND when I hadnāt. So the AUX LED is working now.
This is with a cheap chinese red one, probably not too efficient, pulls about 1.2mA total (1k5 resistor). Due to its size it sits somewhat behind the lens (and quite a bit of light is lost internally). Iāll fix this when I find a better LED.
EDIT: found a suitable 0603 LED, it now sits on a little stem right in the middle, directly under the lens. Current draw on ālowā is ~55ĀµA, on āhighā itās ~1.2mA.
A 2-die (series) red one would be ideal for this but I donāt think there are any. I think even on low itās useful with dark-adapted vision, Iāll have to wait until tonight to find out. Pics below.
Low:
High:
I got away with a single-sided driver btw.
Yup once one gets rid of its original innards itās a nice and very EDC-able little light. It takes all sorts of reflectors and optics due to the screw-on bezel, a few mm +/- donāt matter, very flexible. This one will live a long life Iām pretty sure.
OK, I can confirm. 56 microamps is enough for reading a newspaper in total darkness.
(Although every grandma will tell you ādonāt do that, youāll go blindā)
Ummmm, no. Not going thereā¦
Ohhhhhhhh, suddenly the penny mod iāve seen mentioned makes sense! Itās not a UK pennyā¦ :person_facepalming:
Yeah, i know, a newspaper in this day and ageā¦
Yeah, thatās not where he is not going
Finally getting back into modding.
First two mods:
1) Thrunite TH20 Headlamp, change LED to 219C 3500K 90 CRI.
Loving this headlamp now. So much more pleasant and calming than stock LED with wonderful color rendering.
2) Eagletac M30LC2-C, changed XP-G2 70 CRI Leds to Luminus SST-20 3500K 95 CRI Leds.
There is a noticeable drop in output with the new LEDs. The light out throws my Zebralight SC600w MK III Hi by a small but still noticeable amount. The center intensity is higher than the Zebralight, but the spot is much narrower too. Its my first high CRI āthrowerā and I am very impressed by the color rendering of these LEDs. Its refreshing to see colors pop from a distance. It makes reds/browns pop much more than the 3500K Nichia 219C above. The best part about this light is that it maintains the highest level without overheating at all, and its fully regulated. My guess is that it now outputs about 750 lumens, but this is purely a guess based on my perception of other lights. The spill is quite dim compared to the main spot so its very good at not blowing out your night vision so you can focus on the center spot in the distance. I am curious to see how an XP-L Hi 80 CRI 4000K Led would do in this light, but sourcing these seems expensive.
Modified TomE and TKās RampingIOS to run on the new attiny412 (and in single-channel mode). Loaded it up on my D25 headlamp. The UI is so much better now (vs the D25ās original UI)! Full details in this post.
You say that (āthe UI is so much better now!ā) as if there were something wrong with ToyKeepers UI to begin with.
Edit: Ah, I am going to assume you mean the light is better with Anduril Ramping IOS than with the OEM UIā¦ sometimes Iām so dense. 
Yup, I definitely meant ābetter than the D25ās stock UIā. Thanks Dale, I just added clarification.
gChart thatās an awesome mod :+1:
Did a emitter reflow on a Coast HP1 today.
I have two of them, given as gifts some time ago. And they rarely see any action.
Mostly because they have a horrible cold white blue 6000K+ish emitter.
And they are zoomies, which Iām not a fan of.
Now, given my recent ālevel upā into the world of reflowing, why not give one of them a proper emitter.
I had a SST-20 J2 JC1 2700K CRI95 laying around, mostly to test how Luminusā take on a 2700K performed.
swip swap and the SST20 was reflowed to the tiny custom copper PCB the HP1 uses
The PCB is being pressed down to the shelf via the plastic āthingā
Comparison GIF
Sequence:
0: D4 219B 4500K
1: HP1 2700K flood
2: HP1 6000K flood
3: HP1 2700K throw
4: HP1 6000K throw
2700K is of course a novelty, its very very warm. But at least itās better than the CW, and now has 95CRI 
Hacked together a 4.15$ C8 and an e-switch TC driver running Anduril. It kind of works, still has issues and Iām not even sure if this is a heresy or not.
Interesting. Pics or additional details? How do you have it wired up?
A C8F host is so cheap, easier to go with a light already setup for e-switch. Just wish they made a 1 LED version of the C8F host. Would be a cheap mod for sure.
Only a driver pic so far, itās still quite a mess. Iāll do a writeup if I get this to work reliably.
The setup basically is this: thereās a ~100R bypass resistor in the head parallel to the LED so that the body functions as the positive pole (when the LED is off). In the tail, thereās a 47Āµ filter cap behind a diode. You rely on PWM to keep this cap charged, this means you have to stay below a certain duty cycle. The rest is pretty much a standard ATtiny 85 driver 1+n+FET(w/shunt).
Iām still having issues at the top of the ramp (ĀµC resets) so my max duty cycle is probably too high. I also suspect 18kHz PWM might cause instability. May be a sketchy diode or too strong pulldowns, maybe the springs need bypassing. Maybe bad Anduril config, it sometimes steps down like itās thermal throttling but Iāve got thermal management disabled (and thus canāt even re-calibrate the temperature.) :question:
I pretty much had it stable when running from a lab supply so the error canāt be that far.
This wonāt win any beauty contestsā¦
Yes but whereās the fun? It already exists, and anyone can have it.
Ohhh, ok - you are doing what CK did with a Folomov 18650S custom driver mod. This is pretty cool!
Maybe Anduril is doing LVP stepping down, not thermal? Is it getting good batt+ voltage?
Hope you get it worked out, this would be really nice! How you doing the PCB stuff? It's not OSHPark you got there.
I see our typical parts for the FET gate resistors. Not sure what those 10K's are doing though, maybe that 1K is for the AUX LED.
Yes I suspect it doesnāt get a good supply. āGood batt+ voltageā is relative when it has to get drip-fed through a resistor and a diodeā¦
1k is for the switch LED, 10k are pulldowns for the 7135s (the ATtiny only has internal pull-ups so this was intended for stability but may not be needed at all. ) The cap and the RST pullup are tucked away under the ĀµC.
Itās made 90s- style: laser printer, glossy paper, clothes iron, FeCl3. If I donāt rush it I can get down to 0.5mm pitch. Downside: 2-layer gets tricky; upside: lead time is half an hour or so. Costs: a few cents.