17mm & 20/26/27mm single-sided DD/FET driver release: A17DD-SO8 / A20DD-SO8 / etc

I am flexible on the firmware. Guess any FW with 2 channels/pins and compatibility with this driver would be fine? I will only have 1 emitter and need very few modes. The Attiny13 and 25 are here with me, can use either.

edit:
This is a useful thread but I don’t think it is up to date? Oshpark Projects

I recommended the Nanjg because it can be had pre-assembled for less than the parts alone would cost you to build one up in smaller quantities and if all you want is a single 7135, then there is no reason really to go through the trouble of building one.

Also, why would you want a 2 channel firmware/driver if you’re using one emitter at maximum 380mA current. Makes no sense.

EDIT: If you’d like to build your own driver, than the HQ4S from HarleQuin is a very nice one. There’s also a dual channel version of it, if you’d insist on that for what reason whatsoever.

I would say try one of TexasAce’s Avenger driver boards. They are the most “up to date”. They are triple-channel, but could be used as dual channel by just leaving the extra parts off and a couple minor adjustments to the firmware.

They don’t work with all firmwares, but TK’s Bistro and TomE’s Narsil work with it.

Otherwise I think all of the more recent wight boards are mostly the same, just with minor tweaks. Just go with the highest version number. You can click on one of wights boards in oshpark, and use that to see all of the ones (and most recent ones) that he has posted.

Thank you, pilotdog!

Will compare TexasAce’s Avenger driver and wight’s boards and pick the easiest one to assemble/reflow/with the fewest parts.

Fewest parts/easiest to reflow will definitely not be the Avenger. It has extra little parts that give extra stability.

wight’s boards or my own DoubleDown would be the easiest. Either will work fine with an Attiny13a, but you really want the Avenger if you are using the Attiny25

Take a look at my edit above… I’d recommend HQ4S and BLF-A6 firmware in single channel config with Battcheck _VpT…

two different people asking questions in the thread. I’m replying to MILSPEC, who does want the FET

Sorry, PD and MILSPEC. Totally mixed things up… :person_facepalming: So my comments were adressed to degarb, I guess. Again sorry.

I have this driver A17DD-L FET+1 Driver from banggood paired with xml2 u3 and with Keeppower 18650 3500mAh, Panasonic NCR18650B 3400mA.

With fully charged keeppower battery on tail cap I measured only 3.5A, and with panasonic only 3A in turbo mode.

Is this normal, whether it is worth to change battery to get more amps?

90% chance your meter is the problem

I measured using 0.1ohm 2w 5% resistor, I only get 300-350mV

Those batteries are certainly far from the best to use for max amps - Samsung 30Q flat top is great, maybe the SONY VTC6 the best, but they are pricey. Also depends on other things: thickness/length of LED wires, if springs have been bypassed or not.

Now with spring bypass I have max 4A with Keeppower 18650 3500mAh. About 0.5-0.6A increase.

0.35v is a ton of drop. You can easily lose 1A+ from that much drop.

Looking at this ak47 at mtnelectronics.com . . Close to my desired 100/75/50/25/10 levels. . Never having this driver, I don’t understand which option to choose that would get me close to these single amc7135 levels. . Memory of course, remove two amc7135 naturally. Start in low, if no memory. Probably 7, but is that custom or is custom where I can choose my levels?

Yes, i run a service sector business. . On one hand, both my workers and myself regularly accidentally use the high modes. . This can strand my workers or myself for hours without ideal inspection work lights. . During the sales phase wow factor can come in handy, also my huge Fenix 35 for final brief inspection. . However it is not 2012 anymore and people aren’t wowed anymore. . Runtime is always their first question, and if not full day, they loose interest. . Moreover, you should be able to do more with less power as the years creep. . Not more wow, as the years creep.

So, if the wow (non workday) levels were locked or hard to get to…. It is 8th grade math that one battery swap a day, cost a company 1000 to 2000 use a year.

Yes, the ak47 looking better, as a cheap faster alternative to 555 on vdd. . Though at this 5 minute point unsure how customizing works…. It is easy enough to add a second switch for a second amc7135. . I really don’t like the efficiency droop over 700ma. 700 is super bright with right v6 setup and smallest runtime. . I can always wear a strap on wristlight to double my hl output.

Even biking with my buckpuck 700 ma 2 watt 2x18650 xpl light at highest speed downhill I couldn’t out run my lighting by a 5th. Keeping from inhaling the bugs was my biggest issue.

Such heated topic,many people come to the heated topic…Now I am joining.

Yeah, really heated indeed. No one has written anything for almost three months. Incoming spam alert.

However,I did not get the hotpoint of the topic.What is mainly about ?