Electronic timer based on single-chip microcomputer

Abstract

The invention discloses an electronic timer based on a single-chip microcomputer. The electronic timer comprises a main control circuit, a display circuit, a restart circuit, a relay control circuit,an I / O port circuit and a key switch circuit. The display circuit, the restart circuit, the relay control circuit, the I / O port circuit and the key switch circuit are all connected with the main control circuit; the main control circuit comprises a single-chip microcomputer. The single-chip microcomputer comprises a clock circuit. The clock circuit comprises an oscillator and a frequency divider.The oscillator comprises an amplifier and a crystal resonator; the amplifier is connected with the crystal resonator; the amplifier is arranged in the single-chip microcomputer, and the crystal resonator is connected with the outside of the single-chip microcomputer. The invention has the advantages of adjustable precision and range, frequent use, complete basic functions, small size, light weight, simple operation, flexible use, low price, low power consumption and long service life. The problems that a traditional timer based on the analog technology is simple in function, a large-scale equipment system applying the digital technology is complex, and use is not flexible enough are solved, and better adaptability and marketability are achieved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to an electronic timer based on a single-chip microcomputer. Background technique [0002] Electronic timers are widely used in daily life, such as stopwatches, clocks, and various timing electrical appliances; in industrial control, they are generally embedded in large-scale equipment as timing automatic control modules; they are also used in the medical field, and timers are used designed into medical devices. Generally, the fixed-point reminder or automatic control function is realized by adding a timer module, which greatly reduces the cost of manual monitoring, and at the same time, the timing is more accurate. [0003] Traditional timers are based on analog technology, and the functions are simple to implement. With the rise of a large number of digital technologies, traditional timers are gradually unable to meet people's needs; Not flexible enough and not very appl...

AI Technical Summary

Problems solved by technology

[0003] Traditional timers are based on analog technology, and the functions are simple to implement. With the rise of a large number of digital technologies, traditional timers are gradually unable to meet people's needs; Not flexible enough, not very applicable

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