Is all that really needed? i mean as far as i knew all i need where 2 lines.
it is a nice schematic though and im considering it. still to do so i would have to modify it.
my program uses pin 2 as the SCL line and pin 3 as the SDA line, but both pins are input and output. Ive noticed that alot of circuits use 4 pins, 2 for input and 2 for output, why? the protocol was meant for just 2 wasnt it?
lets say i want to use that schematic, how would i adjust it to suit me? i noticed that he sets all his data pins (pins 2-9) high to power the circuit, my program uses those pins and i would need a external 5v power supply, thats easy. but im not farmilliar with the square and circle components. could you help me?