I tried to build one of these Nanjg92 drivers by following djozz’s way just now, and I got very good results. 8)
^The drivers were ordered from Banggood. All the 7135 chips have been harvested for the other use next time.
^Soldering work is much easier than stacking the annoying 7135 chips! The FET was bought from ebay as introduced by our fellow members - but wait, now they were sold out already?!
^22awg wires and spring were added to the driver. The spring was reviewed by djozz here and its resistance was found fairly low, so I didn’t bother to attach copper braid on it.
^Assembled everything in my HD2010.
The modes are all working correctly and the current draw on high mode is 4.9A - 5.0A measured at tail with my INR 20R, and it was not even fully charged at that time.
I am very satisfied with the outcome considering all the parts are relatively cheap, easy to build and produce amazing result. The only ‘problem’ is that the low mode is still quite bright (as highlighted by the others before) and there is a little visible PWM pattern. I am not sure if the MCU can be flashed because its PWM output pin is seemingly different from the Attiny13A on the common Nanjg 105C. The PWM output pin of the Attiny13A is on Pin 6, while for this AK-47 it is on Pin 7?
Thank you djozz and comfychair for sharing such an excellent method with us. 