I have an Arduino UNO R3.
Since i have SDA and SCL pins near the AREF Pin, if i Use I2C will i still need to leave pins A4 and A5 free? or can i use the analog pins for other purposes?
SDA (pinA4) and SCL (pinA5) are brought over to the connector near the USB connector. you are correct in that they are A4 and A5.
A4 and A5 should not be used for anything else.
Ok then...
Thanks for your help...