I planning on having 8x seven segment displays driving off a single 7219. The vcc is 5v. I was wondering how does the 7219 divide the power amongst the displays? Not decided yet but I probably only want 5 ma for each segment so 40ma for each seven segment display. The datasheet doesn't explain it in a way I understand.
Is it just usual way of working out a resistor for an led ? if so how is it able to guarantee the same amount for every one of them