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Abstract
The late 20th century, electronic technology has been rapid development in its promotion,
penetration of modern electronic products will almost
Fields, a strong impetus to the development of social productive forces and social improvement
in the level of information, while also further improve the performance of modern electronic
products, replacement products have become increasingly fast pace.
Growing emphasis on modern life from the time the concept of time and money can be said to
draw the equal sign. For those who are very strict and accurate grasp of time and things, time
will not exactly bring a very big trouble, so as to control the display of digital clock than
the clock pointer showed a big advantage. Digital display of time reading simple and fast,
accurate display of time to seconds. The mechanical oscillator depends on the crystal may lead
to errors.
Digital Clock is a digital circuit implementation of the "when", "sub", "seconds" The
figures show the timing device. Digital clock precision, stability, far more than the old
mechanical clock. In this design, we use LED digital display hours, minutes, seconds, to
24-hour time mode, according to digital control theory to dynamic display to display, use the
12MHz crystal oscillation pulse, the timer count. In this design, the circuit has a display
time of the this function, you can also realize the time adjustment. Digital clock is its