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A digital clock is a type of clock that displays the time digitally, i.e. in cyphers, as opposed to an analog clock, where the time is displayed by hands. Usually, digitally clocks are associated with electronic drives. (Analog clocks are driven mechanically or electronically.)

Digital clocks typically use the 50 or 60 hertz oscillation of AC power or a crystal oscillator as in a quartz clock to keep time. Most digital clocks display the hour of the day in 24 hour format; in the United States and a few other countries a more commonly used hour sequence is 12 hour format (with some indication of AM or PM). Digital emulations of analog-style faces exist as well. The simple applied electronic circuits are divided in to two groups, analog and digital circuitry. 

Analog electronic circuits are those in which signals may vary continuously with time to correspond to the information being represented. Electronic equipment like voltage amplifiers, power amplifiers, tuning circuits, radios, and televisions are largely analog (with the exception of their control sections, which may be digital, especially in modern units).

In digital electronic circuits, electric signals take on discrete values, which are not dependent upon time, to represent logical and numeric values. These values represent the information that is being processed. The transistor is one of the primary components used in discrete circuits, and combinations of these can be used to create logic gates. These logic gates may then be used in combination to create a desired output from an input. In this page you can find one of the circuit.

Basic of Digital Clock Circuit

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