modifing LD-4B buck driver

[degarb]

http://intl-outdoor.com/ld4b-24a-17mm-buck-driver-3v16v-p-817.html

I am looking for a video how to find and modify the resistor to change the default current. . Many others will want to lower it, to raise current. . For me, I want to lower it. . Still doubt the 2 other settings will be, nor are, useful. . I am guessing the driver designer use pwm to lower the current in mid and low mode. If I could remove their pwm, and add my own infinitely variable pwm, all the better. Main thing here is clear graphic or video to change out that resistor. . I am guessing the value range is so low and narrow that no pot would spec in range.

 

[DIWdiver]

Yes, the sense resistors are too low value to sub with a pot. Generally less than 0.1 ohm. I've used down to 0.005 ohms. If you can see a resistor that's larger than the others, it's likely the sense resistor. Or if you can see one marked 'R10' or 'R02', or something like that, that's certainly it. Or you can test them all with an ohmmeter and the one that reads essentially zero is it.