The design of simple Frequency Measurement
ABSTRACT
Frequency measurement is the most basic measurement in Electronic field. A simple frequency
meter mainly by the signal input and amplifying circuit, microcontroller module, sub-frequency circuit
module and display module. AT89S52 MCU is the control core frequency of dollars to plete its count
of the signal under test, decoding, display and control of the frequency division ratio. Using its
internal timer or counter to plete the signal of the under test cycle / frequency of measurement.
Throughout the design process, periodic measurement of the frequency meter application and
the corresponding mathematical treatment to achieve 10Hz ~ 2MHz frequency measurements, and
can automatically switch the flow to achieve scale. To the core of AT89S52 microcontroller, with the
MCU internal timer / counter gate time, it can be easier for frequency measurement.The use of
microputer technology to design a digital display of frequency meter, have a measurement of high
accuracy, fast response, small size and so on.
KEY WORD: Frequency meter; single chip; counter; range automatically switch
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