I have a 7-segment Common Anode display I got off spark fun. It has 5 pins at top, 5 pins at bottom. Center pins get +5v(common anode) and the remaining 8 pins(cathodes) when grounded, through a series resistor, will light up.
So I know the arduino has internal pullup resistors and if I used let's say, digital pins 2- 10, couldn't I simply set them as all pull ups and then set them low whenever I want to switch it on? I just don't know what the Arduino's limits are when it comes to it's internal resistors.
It's that or add my own pull up resistor on every single pin...which sounds like a pain if I can use internal ones.