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The DS1307 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially through an I²C, bidirectional bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information.
You should use some microcontroller ic for driving 7-segments and reading
ur last link is rele very nice,but it's schematic is not very clear. The image quality of the schematic is too low.What r the values of resistances and capacitors??? Also i want c code or BASIC code so that i can modify it later as my wish but this link is only provided with hex code.can u plz help me with coding and dis unknown value of resistances and capacitors??