I might be wrong about the resistors i combined to get R1. I remember for sure i got like 19.5-19.6k ohms.
In the last pages , people suggested 19.1k ohms for R1 and 10uf capacitor , that’s why i had my doubts Tom E.
Thanks for your answer… 
You might want to try battcheck.hex as a sanity check, to make sure your voltage calibration is good.
Also, I think the starry-offtime code uses only the 7135 channel for its blinks, meaning it won’t light up at all on a FET-only driver. It’s a simple one-line change though, if you want to fix that.
Starry-offtime was basically an early prototype of blf-a6, and you might find blf-a6/tk-otc.c a little more robust. It’s blf-a6 minus the soft config mode; configure it at build time instead.
In any case, a FET-only driver will likely require some adjustments to make everything work on just one channel.
question-if i use this driver in triple xpl for one 18650,it has still the same characterics? mode groups,memory on/off?
thanks:)
Yes, obviously the xpl’s need to be connected in parallel. 
Hello everyone .
Can anyone help me get this driver zener modded ?
I mean , what R2 , Rd (resistor in current diode space) and zener should i order , and also , is an already modified firmware available (with the right lvp) ?
I want a simple firmware , 3-5 modes , nothing more .
The driver this thread is based on went through many revs - not even sure what the latest looks like.
This is a similar driver with a zener mod. Notice the 200 ohm resistor in place of the D1, and the zener in it's proper pad, to the right of the MCU. I used this in a XHP70 mod to a Roche LS01.
Some members here told me to use R1 19.1k , R2 2.2k , 200ohm resistor on the place of D1 , and a zener .
What firmware could i use ?
edit : i use v044 boards
That's about the proper ratio, as long as the ratio of R1:R2 is bout the same as 36K:4.7K, all depends what resistor values you have or can get. If you stay with these ratios, you should be able to use standard 13A firmware with LVP protection, because that ratio specifically match's well for 2 cells in series.
Oopsie! Forgot, a "2000" labeled resistor is actually 200 ohms,
thank you very much Tom for your help!!
I have already the resistors , but i can’t find a source for the zener diodes .
Which firmware should i use exactly?
Edit : Any other zener except BZX384-B4V3,115 ?
Ahhh, for firmware, I haven't been doing much with 13A's as of late. I'm at work, so don't have access to all my firmware verisons. I got my own spins on 13A, 25, and 85 firmware, but it's all based on STAR pretty much, so I'd looke at the STAR versions, but like I said, bout anything would do.
This is the standard zener we use:
http://www.mtnelectronics.com/index.php?route=product/product&path=25_104&product_id=316
Richard probably buys them at Mouser, think I also did recently. I think MtnE and Mouser are ruled out for you cause of shipping costs, etc.
Mtn has lower shipping 
Thanks for your help
Almost any firmware should work, but you’ll still need to calibrate the voltage yourself. And from what I hear, LVP may be a bit tricky on this setup. There are reports of voltage sag so severe that turbo mode triggers LVP even on full cells.
Tk what firmware should i use?
Starry-offtime?
Use whichever one has an interface you like.
I may be a little biased about which specific project. However, it probably depends on what kind of light you’re using and what you want to do with it. For example, blf-a6 is nice for EDC lights but not as nice on throwers, because it starts on low. Meanwhile, STAR_off_time has an option to start on high instead, so it might be better for throwers. Both offer mode memory if you want it.
Okay. . I would like one without the fet or anything above 380 ma. . The settings need be 100% of one amc7135 (not 2 or more) , 75,50,25,10,5% pwm based on max 380ma. Is this possible? . Or how much is possible?
Most drivers are wow factor designed, and such are lacking for usefulness and efficient 10 plus hour runtime from a single 18650.
Why not just use an ak-47-a and remove some chips? Cheaper and easier.
Of course it's possible, pretty simple for implementing in any FET+1 firmware version out there. Of course a fully populated FET+1 driver can do all that, plus have a turbo mode using a FET and there's no difference whatsoever in runtime per mode, for the modes you specified. You would just get the best of both worlds - that's why the FET+1 drivers were created to begin with - great run times on the low modes using just the 7135, super output when using the FET.
Tom, degarb is an oddity. He has e-mailed me several times and he has no interest in anything more than the power stated, period.
Easiest solution is what Richard suggested , get an ak-47 and leave only one 7135 .
Other solution , take a fet+1 driver , remove fet , modify firmware .
Ahh, not a problem. Posting on this thread I would assume he wanted to buy one of these boards or already had one. Lots of options...
Anyway, good to see you posting 
On a 3500 mAh cell on a 7135 you would get about 10 hours of ~150 lumens or so, on a typical XM-L2 or XPL. Think I saw ~180 lumens on triple or quad LED setups.