It seems that no led can dethrone mighty XP-G2 S4 2B 285 kcd for B158 is really low no matter how funny it sounds :) . It is an exceptional flashlight. But now we know which led we should stick to.
In fact I done about 60 of them. They are running without issues in plenty of flashlight hosts. I just got inspiration with new batch so I just wanted to show you some, and I think I am not the only one that is doing them. You managed to spread this FET virus around the globe :)
When I saw this thread I asked myself: " jerk why the hell are you loosing time on stacking chips? Try that cause this Djozz guy really knows the modding stuff..." , and when I done few of them I realized that in fact you are one incredible guy cause you unselfishly show me how to make perfect driver for my needs.
Any of the AK-47 boards will work, for sale at DX, Banggood, or anywhere. I like the AK-47-C1 because it has no mode memory and starts on low: http://m.banggood.com/Wholesale-AK47C-Mode-Circuit-Board-Without-Memory-Function-For-Flashlights-p-63077.html
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).
285 kcd for B158 is really low no matter how funny it sounds :) . It is an exceptional flashlight. But now we know which led we should stick to.
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