I had some issues getting a 10uf capacitor(ordered now) and the 19.1k resistor…
So , i used a 4.7uf capacitor and a 19.6k resistor (one 22k ohm and one 180k ohm resistors , parallel).
I flashed starry offtime , but my modes are weird.
I get (with half clicks): low, medium1, medium2, high1, high2, blank(flashlight does nothing) , strobe , and turbo(?) .
If i unnderstand right , where i get the “blank” mode , i should getting battcheck.
Why did this happen? thanks
Bonus question : If i want memory enabled , i should connect “star 3” to ground ?
Uhhh - parts list in the OP calls for a 22K ohm resistor for R1, so why didn’t you use the one you had? Also the parts list calls for a 4.7 uF cap - should be fine I’m think’n (didn’t try myself though).
Not sure bout the blank mode, but sounds like the battcheck isn’t working - check those R1 and R2’s. Not sure bout the stars in starry offtime.
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.
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.
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,
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.
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.
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.
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.
