Electronic clocks have importantly taken the place of the mechanical clocks. They are very dependable, speed, sustenance independent and portable. There are two types of electronic clocks, digital clock and analog clock. The digital clocks are general and free of external means. This will require the controlled gadgets and execution of software for microcontroller since the hardware gadgets has no aim to execute. Several kinds of digital modules and clocks are present under the retail and yet the clock is distinct under the real time.