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Analog Frequency Meter Circuit

2017-12-21 14:06  
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analog frequency meter


Analog Frequency Meter Circuit using NE555

This 1-kHz linear-scale analog frequency meter circuit uses the 555 as a pulse counter.

Analog Frequency Meter Circuit

PARTS LIST
R14.7kΩ
R24.7kΩ
R310kΩ
R422kΩ
R54.7kΩ
R62.7kΩ
VR150kΩ
VR22.5kΩ
C10.001μF
C20.01μF
C310pF
D11N4148
Q12N3904
IC1NE555
IC2LM7805
M11mA meter

2N3904 NPN Transistor General Purpose Amplifier

2N3904 NPN General Purpose Amplifier

VR1 Adjust for 1kHz full scale reading.

Frequency is read on M1, (or 1mA meter) which can be calibrated to read 0 to 1 kHz.


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