I'd like to ask if I want to connect 4 seven segment displays to arduino : http://sell.lulusoso.com/selling-leads/687663/5082-7613-Seven-Segment-Display-circuit-diagram-unit-driver-Agilent.html
1) How are the wires should be ? 7 pins for outputs , 2 com , 1 for dot >> I guess every one of the 7 pins should be connected to the SDA , but what about the SCL ??
2) if it's connected correctly, Do every pin (a,b,c,d,e,f,g) of the 7 need to have ( start transmission, and end transmission )
I mean do we consider each pin as a single slave?
3)Also , how to connect a button using this protocol ?
I'm really confused !!