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The design of frequency meter based on single chip
Abstrac Frequency, also known as frequency counter or electronic form. It is not
only electronic measurement instruments and professional in the field of measuring
frequency and the cycle than the frequency of measurement and counting, the important
measurement instruments, oscilloscopes and measuring frequency than more convenient,
more economic, especially the modern electronic counter products and components And a
variety of measurements of the digital frequency, has been widely used in computer
systems, radio communication equipment, automated production process measurement
and control devices, with LED, LCD modules figures show that the number of instruments
and many scientific and technical fields. It can be said that along with the development of
digital technology, computers, communications equipment, audio and video technology
into the research, production, military technology and economic spheres of life, until the
families and individuals, making electronic means of measuring frequency counter and the
electronic equipment and even for the decoupling Inseparable technology.
I have designed one kind of frequency meter which regarded Single-Chip
Microcomputer AT89C51 as the core.The mathematical operation of applying in
designing Single-Chip Microcomputer and controlling the function, has overcome the
general digital frequency meter in the shortcoming not high of the precision of low
frequency; frequency meter at first with timing of Single-Chip Microcomputer / counter
1S produces as controlling the gate signal regularly.Then examine signal is it have a
facelift square wave cycle conduct of pulse signal after count to amplify, is it examine into
frequency value of signal to try to get , show through 8 circuit display number value
dynamically finally.The circuit is made up of three following parts mainly: a.AT89C51
Single-Chip Microcomputer. It is a core of the frequency meter, most work are finished by
it; b.Enlarge and have a facelift the circuit. Prepare for frequency measurement; c. the
display circuit. Used for showing frequency value.
Key Words: Single-Chip Microcomputer; Frequency Meter; Display
