Grumpy_Mike:
Exactly like that.
So I should try to find the common GND of the built in RGB controller and share it with the Arduino and use it as GND for the voltage divider as well?
Grumpy_Mike:
Exactly like that.
So I should try to find the common GND of the built in RGB controller and share it with the Arduino and use it as GND for the voltage divider as well?