Has anybody yet tried to fit the sc31 pro driver into the sp40?
Would be nice to keep the usb-charging and the lighted switch that way.
This isn’t possible as the SP40 switch is part of the driver
That shouldn’t be the problem, since you can desolder the switch and just connect it to the sc31 pro driver by wires. If I’m not mistaken 
But it looks like the usb port is at another height. The sc31 pro’s port is quite low.
Mod went easy from what I can recall, but dumped the charging.
I said that it isn’t possible……
Okay, well that’s good to know, thanks Tom
Went with a warm LH351D, runs Anduril 2 now. Pretty nice, but not a fan of using these rt. angle lights as a headlamp. Prefer the centered D10/D25 style much better.
The tricky part of this mod was de-soldering the switch PCB, once that was done, the rest was standard stuff.
I like them for clipping them to a backpack or something like that.
May I ask, why you aren’t using the voltage divider on the new driver? To safe battery life while Off?
And do you think the double layer 20mm Texas avenger Fet+7+1 driver
OSH Park ~(link is external)
would fit as well?
Now that I’ve seen this project I must build me one as well.
Sure, ask away! voltage divider? What's the advantage of it over using the internal method for a 3.6V 1 cell light? No need to add any extra parts, though the external voltage divider may be more consistent, not sure though. Still for the internal method, you can calibrate it once with Anduril 2 and it's done.
The TA FET+7+1 driver should work, as long as it's got clearance for the parts.
I didn’t knew, that anduril is also able to use the internal voltage check, thats awsome.
Then i’m gonna order the 3 Channel driver. If i dont need the voltage divider i can use Pin 7 on the µC for the Switch LED. 
Im quite new to this toppic, but shouldn’t be a 3-Channel driver a little bit more efficent, since the LED isn’t running in PMW at its highest rating all the time?
Thanks for your support Tom!
Well, in the past we thought the 3 channels were more efficient because of the PWM'ing up til 2.45 Amps of the bank, rather then PWMing the FET is more efficient, so the only advantage is the low amp levels, above 0.35 amps but below 2.45 amps. But lately, I don't think even TA thinks the 3 channels drivers are worth it. Plus the fact the 7135's are getting rarer, the good ones, at least. The 7135 we use must be the raptor claw (symbol looks like a raptor claw) while the sailboat looking symbols on the 7135's have problems. The 7135 is ancient, out of production a long time now, and only available from suppliers in China as clones, least this is how I understand it. I really don't like using them at all - there are better options but I still have and can get more FET+1 drivers in the form factor I need, plus I got a decent supply of raptor claw 7135's.
Yes btw, I use pin #7 for the switch LED on some of my drivers as well, even though the driver wasn't designed for it.
NIce Review!
Thank you for sharing your experience.
We will make improvement in our products according to your guys advice!
Thank you for this nice review, here are some explainations about our design, and something we will do better in the future.
It is not very helpful to put turbo in normal UI rotation, because it is easy to heat up, and then the mode will step down from Turbo to High
In standby, let the side indicator LED light up, which will make the UI more complicated, and some people would like to use the indicator LEDs as Aux LEDs while the light is off, but some people not.
Awkward button position? Beacause SP40 Headlamp is small and compact, there is no enough place for the side button.
The new version of the headlight will add moonlight!!
Yes, just got the HD05 and it’s nice to have the moonlight. :+1:
Future version should have Anduril on a post-2016 AVR processor (t1616 etc), and should at minimum have a UPDI pad on the driver. That fixes all questions of moon mode, turbo in rotation, etc. since people can set it any way they want.
I’m new to this idea of very powerful headlamps (1000+ lumen). I’ve never used one or felt like I wanted one. Maybe I don’t know what I’ve been missing. I always used headlamps for close-up stuff requiring both hands: cooking, setting up tent, fixing car, whatever. For throw I’ve used a handheld light.
I was terrified by the temperature curve at the top of this review (60C!). In normal usage (i.e. unless you choose a special turbo mode), light should never be allowed above maybe 45C. Even 40C feels warm.
A lot of manufacturers are a bit wary of offering too many Anduril lights. It’s quite frankly a enthusiasts UI. For mass market appeal more simple Eco - L M H - Turbo UIs are just simply the best.
For headlights I also believe there is just flat out less need for too many tricks. Mounted on your head you usually don’t need party modes or super hot rod turbo.
What I always will appreciate though is a good and decently low Eco/Moonlight mode, reachable with long press shortcut. And regulated output, that should be the goal for all new competitive lights from now on.
Make the sustained output flat as possible.
One thing I have to complain about the SP40 is there should be a mode between med and high. High heats up too much for me and medium tends to be not enough when hiking.
Certainly it’s possible to configure Anduril for Eco – L M H – Turbo or whatever you want. The other stuff would be there in “advanced mode” if you went to the trouble of entering it. Maybe the Anduril docs etc. are not really clear enough about this. There is a “simple mode” now which allows ramping and some other things, but maybe there should also be a “basic mode” which is even more minimal.
I agree with this wholeheartedly. The only divergence would be the instance an end user abandons the headstrap altogether in favor of a dedicated right angle handheld torch. Probably a rare bird though. If drafting multi-mode SW for flex use headlamps, I would think having a static “headlamp mode” as you have described in primary position, and then an Anduril type free-for-all option for non-headlamp applications might be desirable.
Does the SP40A have moonlight?
Says same UI
Same Operation UI— 4 brightness modes
LMG - Turbo