International Journal of Engineering Research and Applications (IJERA)
Now-a-days, electronic clocks have predominately replaced the mechanical clock. They are much reliable, accurate, maintenance free and portable. In general, there are two kinds of electronic clocks. They are analog clock and digital clock. But digital clocks are more common and independent of external source. It would need the controlled devices and implementation of software for microcontroller controlled system because the hardware devices cannot do any desired task to execute in a real time system.