Hi,
See my clock with some theory here:
http://www.electronics-freak.com/lesson-15-arduino-i2c-rtc/
Enjoy,
Roee
You should have a look at my DS1307 Arduino based Digital Clock. This project is designe in Proteus ISIS software. Both the simulation and code are given on this link for download.
Dear Roee, when i click on the address, it says "page not found" please correct the address
best regard