Hello. I'm working on a 4 digit digital wall clock and I want to add a potemtiometer to controll the brightness of displays. I'm using a common cathode 7-segment LED displays and each cathode is connected directly to outputs of a demultiplexer which controlls what display is currently on (I'm making basically the same display that Ben Eater made in this video)
I'm planning to add a potentiometer to dim all displays at once, but I have no idea on how to do it without using Arduino. Is it even possible?
Thanks in advance for helping.
Thanks in advance for helping.