I got to tell that with last BG order I ordered 20 AK47 C1 driver and I got mixed order! They send me 10x AK47 C1 and 10x nanjg rohs 111 (1050mah) which is the crappiest single mode driver I ever seen. After paypal fight they refunded half of the money.
At start they did not wanted to refund claiming that nanjg 111 rohs is new version of AK47c1 :)
This is how rohs looks except I got with 3 amc7135 chips:
So maybe we need to start finding that on other sources (KD, DX, ali or other...)
Maybe you'll be more lucky. They had good drivers until last order. Their drivers are with this mode order high-med-low without memory effect. DX are lo-mid-high without memory effect.
The first one works, the second one undoubtedly too (why not, nothing in this mod seems very critical), but the different lay-out requires finding a suitable new spot for the FET. And it may not have that nice direct route for the led+ that the AK-47 has.
Yes. They suck. I don't know what solder do they use for "nanjg rohs" but 10 year old kid could better solder default 24 awg wires that came with them :)
It becomes a direct drive situation once the FET is installed, so the current will be what your led draws when directly connected to the battery. That said, there's a minute amount of added resistance from the FET, but that is nothing compared to your springs, switch, wires, battery contact points.
-The FET driver from the OP, and a lot of other FET-drivers use PWM for lower modes, the FET is used as an on/off switch.
-in very few FET-drivers (I know just the drivers sold by led4power) a different type of FET is used that can regulate the current controlled by a chip, so the lower modes have no PWM.
-a FET-driver developed here on BLF (contributions by RMM, wight, and others, a famous firmware for it written by Toykeeper), also uses a FET in combination with a 7135 current regulator. The 7135 is used for low modes, the FET for highest modes. Most modes have PWM, except the highest (full FET) and 350mA (full 7135).
I have been considering a similar mod to the one in the OP, but leaving one or more 7135’s on the board, making for a cheap dual channel fet driver using STAR firmware. Has anyone done this? I think it would just be a matter of some trace cuts and maybe an air wire or two.