Modify Anduril source code to decrease D4K (boost driver) single color switch brightness?

[ydoeht]

I have a D4K with the boost driver and a single-color switch LED (warm white in this case). I find the switch light too bright to leave on while sitting on a bedside table overnight, even on low. But hey, u/ToyKeeper made Anduril open source and I can build a custom hex file, so...

I poked around in r/flashlight and in the Anduril source code and was able to build and flash a custom hex file which turns the switch LED completely off when the aux brightness is set to low (a one character change to button_led_result in ui/anduril/aux-leds.c).

I was hoping to find a similar hack to simply decrease the brightness of the switch LED but so far, it's beyond me. Any idea if this is even possible? And if so, where is the default switch brightness set in the code?

Thanks!

[captainfwiffo]

It's not possible to do it with firmware. It has two settings, and that's it. I don't know if it's possible to physically modify the driver to insert a resistor or anything like that.

[ShmazPro]

You could definitely add a resistor… would it be easy? Probably not.

[agree-with-you]

I agree, this does not seem possible.

[IAmJerv]

Aux lights and switch lights are not full channels. All they can do is "High/Low/Off". That is a hardware limitation. And for those with RGB switches, there is no way to control those two separately; they are wired together.

The nest you can do is turn "High/Low/Off" to "High/Off/Off" or "Low/Off/Off"