Electronic clock introduction
An electronic clock is a timing device that uses digital circuits to display seconds, minutes, and hours. Compared with traditional mechanical clocks, it has the advantages of accurate timekeeping, intuitive display, and no mechanical transmission, so it is widely used. With the continuous improvement and beautification of people’s living environment, digital electronic clocks can be seen on many occasions.
An electronic clock, also known as a digital display clock (digital display clock), is a device that uses digital circuit technology to realize the timing of hours, minutes, and seconds. Compared with mechanical clocks, intuitiveness is its main distinctive feature, and because it is not mechanically driven, It has a longer service life and is more accurate than the quartz movement of a quartz clock. Electronic clocks have become an indispensable necessity in people’s daily life, and are widely used in personal homes and public places such as stations, docks, theaters, offices, etc., bringing great convenience to people’s life, study, work, and entertainment.
How the electronic clock works
An electronic clock is a timing device that displays “hours”, “minutes” and “seconds” in the human visual organs. Its timing period is 24 hours, the full-scale display is 23:59:59, and it has the function of correcting the time and reporting the time.
Therefore, a basic digital clock circuit is mainly composed of decoding display, “hour”, “minute”, “second” counter, time correction circuit, time signal circuit, and oscillator. The main circuit system is composed of a second signal generator, “hour, minute, second” counter, decoder and display, time calibration circuit, and whole point timekeeping circuit. The second signal generator is the time base signal of the entire system. It directly determines the accuracy of the timing system. It is generally realized by a quartz crystal oscillator and a frequency divider. The standard second signal is sent to the “second counter”. The “second counter” adopts a 60-ary counter, and sends out a “minute pulse” signal every 60 seconds accumulated, which will be used as the clock pulse of the “minute counter”. The “minute counter” also uses a 60-ary counter. Every 60 minutes of accumulation, an “hour pulse” signal is sent, and this signal will be sent to the “hour counter”. The “hour counter” adopts a 24-base timer, which can realize the accumulation of 24 hours a day.
The decoding display circuit decodes the output status of the “hour”, “minute” and “second” counters with a seven-segment display decoder and displays it through the seven-segment display. The hourly timekeeping circuit generates a pulse signal according to the output state of the timing system and then triggers an audio generator to realize the timekeeping. The time calibration circuit is used to calibrate and adjust the display numbers of “hour”, “minute” and “second”.