The 17mm boost driver looks good, but I’m hoping the larger ones will have more power. I’m at a point in my flashaholism that I’m not satisfied with a reasonable amount of power. I need an impractical amount of power. 
Here’s some pictures. Hmmm, no Atiny85.
There’s not a big difference between 4.2A and 6A. So if you wanted a 70.2 in an S2+, 4.2A is still great. You’ll get much longer run time compared to using 2 x 18350.
Maybe you mean the 12v output? That I can understand.
Personally, I’m still waiting for the e-switch versions with ramping. 
I just ordered a boost driver for my S2+ copper edition… I’m planning on using a xhp50 90 cri led that i have on hand for now for the build.
Be sure to post your beam shots and stuff with that LED. I ordered a 50.2 80CRI 4K one to try in a miniC8 OP reflector
Will do, I’ll report back once I have it put together. My led is 5k and the product code is XHP50A-00-0000-0D0UH250G. TA got his hands on some xhp50.2 4.5k 90cri leds that he is going to test on and I think he plans on putting up some for sale. I’m hoping to get my hands on a couple if TA sells it.
They are here:
Didn’t realize yours were XHP50 and not 50.2 I guess it might not be so comparable to mine. Still interested in your results
Also, I dont want to burst your bubble about that 4500K LED but expect a tint shift if you put it in an S2+, here’s are some beam shots of the zebralight 50.2 4500k 80cri:
Well I’ve used these xhp50 leds to make a triple before so I know I like the tint. The 50.2 leds TA has are 90cri and not 80cri, I’m not sure how much difference that’ll make when it comes to the tint shift. Plus I plan on using TIR optics or a Ledil Boom reflector for the light which should eliminate or reduce the tint shift.
Ordered a 17mm BST and there are now just a handful left… XHP50.2 J4 in a C8 with OP reflector, I hope to get a nice even beam out of it.
My wild guess is an ATtiny1616. Either way I think it’s the component on the bottom which could be nice.
What is the component on the bottom? I can’t make it out.
I can’t make out the writing but it looks like it could be a 20 pin package. The ATtiny1616 data sheet shows a ATtiny1616 20-pin VQFN (on page 15) which is consistent the image.
If that’s the AVR then a attractive feature is “Single pin programming and debugging interface (UPDI)”. That along with the presence of the AVR on the exposed side of the driver is a pretty big deal.
Of course it’s a guess for now… [EDIT] a guess that’s probably wrong… There are 20 pin versions of the ATtiny25/45/85.
Mine says
A645
T25
20MUFB
A8PBYA
Maybe a tiny25-20mu
I think that makes sense. It’s good to have something concrete. Thanks.
So, who has tried the boost driver? What are your thoughts?
They seem to work well. The moon is a bit brighter than most FET+1’s at about 5lm I think? guppydrv is nice but ill prob buy the next one with Bistro if it becomes available just to have a consistent UI. The host I used is a Jaxman mini C8 w/ 50.2 so turbo basically steps down instantly. The other modes look pretty consistent though.
Very much looking forward to higher powered 20-22mm versions.
I’m running one in both an m1 and a c8 with OP reflector. Each has a 50.2 in it.
I changed out the tailswitch springs on both lights with firmer ones, because a slight bump to the tail was enough to change modes on them. They have a brass button soldered on.
I am super happy with both lights. They drop down pretty quickly, but gradually when in turbo. You barely see it, but after 20-30 seconds it’s much less bright. They don’t get terribly hot though.
I think I got around 2200-2500lm between the two. Don’t have my notes handy. A bit more from the M1, as it’s a 5000k and the c8 is 4000k. Each was with a VTC5a.
Got a s3 host and a f13 ready to go as soon as the 17mm are back in stock and the 22s are listed.
If you have a way to measure the relative output can you try to disable the thermal protection on the C8 and see if it holds a steady turbo with a fully charged battery? I want to test this but i’m afraid to try it on my tiny host w/ just a pill. Doesn’t have to be long, as long as you feel comfortable just curious if turbo is ever constant.
Was wondering if you be stocking the Noctigon Meteor M43 again?
Sure. I had it on the default temp settings, originally. Haven’t messed with much of the ui actually.
My meter doesn’t log, but I can take readings at intervals to see what it does over time.
Meaning to fully test these lights anyway.
Batteries on the charger, I’ll post back here when I’m done, hopefully tonight, possibly tomorrow.