Multi-function digital clock digital circuit of "when", "sub", "seconds" The figures show that the timing device. Time display, alarm clock settings, time function, the role of calibration. Accurate travel time shows that intuitive, precision, stability, and so on. Circuit is very compact device, the installation is also easy to use. At the same time, the date, it has its small, low cost, travel time and high precision, easy-to-use, functionality, and ease of integration by the majority of popular consumption.
Digital clock from the principle of speaking is a typical digital circuits, including combinational logic circuits and sequential circuits. At present, the function of the number of minutes getting stronger and stronger, and a variety of special large-scale integrated circuits to choose from. Conducive to learning from the point of view, here are introduced to small and medium-sized digital clock integrated circuit design approach.
After the digital circuit design this course to learn the system, in particular, has been on the combinational logic circuit and sequential logic circuit part of the study, we already have a design capacity of small-scale integrated circuits, by design by the opportunity to study the full apply knowledge to practice.
The curriculum design of a digital clock design, the basic requirements for the number of minutes for the 24-hour cycle, the digital clock display hours, minutes, seconds, the number of minutes a second benchmark real-life counterparts of the second clock. For the expansion relates to the timing of the automatic alarm, automatic playing time bell, regular radio, street lamps and so on from time to time headstock. Thus, digital clock and to expand its applications, has a very practical significance.
Keywords crystal oscillator, prescaler, counters, displays and school circuit
