I recently upgraded the firmware of a Sofirn SP36 BLF LH351D 4000k (old version without powerbank-functionality) to Anduril 2 (and added two 5.1kohm pulldown resistors to the USB-C CC1 and CC2 pins to “ask” USB-PD compliant chargers for 5V using C-C cables). I also changed the button LED colors to red and yellow instead of red and green. The yellow LED’s seem to have a higher Vf than the green LED’s though, so the button LED is now unfortunately only visible on “high”. I tried decreasing the on-board current-limiting LED from 1k to 500ohm but that didn’t really do much… Is is possible to change something in the firmware to increase the lower button-brightness? Thanks!
(I flashed the “anduril.2021-12-13.sofirn-sp36.hex” file btw, and so far I noticed that SOS is missing from the Sofirn SP36 (Pro) & Q8 (Pro) diagram, but I won’t miss that haha)
I see, thanks for the quick response! Could I change the 1k resistor to maybe 100ohm to get a higher “low” brigness? The lowest I went to was 400ohm I think… Although when changing resistors the “output” voltage didn’t seem to change all that much so I doubt that’s going to give the desired effect, I suppose I just need to find yellow/amber LED’s with a lower Vf…
Thanks. I didn’t thought about checking it out before disassembly. A bit strange because the original fw3a has fet+7+1. I know that the new ones have fet+1, but I didnt know that the soft has changed too.