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Topic: I2C with seven segment dispalys and buttons (Read 623 times) previous topic - next topic


Hi guys,
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 !!



Jan 06, 2013, 11:47 pm Last Edit: Jan 06, 2013, 11:51 pm by sinuretta Reason: 1
4) To connect any device using I2C protocl ,, how can I know where to connect the SDA & SCL ?
like leds, buttons , sensors .. etc

5) If I connect a button (address 1) and a led (address 2) using I2C protocol , how will the arduino differ that add1 for button and add2 for led ?
especially they're connected to the same line (SDA) ?



I believe this is a very basic 7 seg. display (note the price).
No time now but look at this:
The way you have it in your schematic isn't the same as how you have it wired up!

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