Analog Frequency Meter Circuit

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
R1 4.7kΩ
R2 4.7kΩ
R3 10kΩ
R4 22kΩ
R5 4.7kΩ
R6 2.7kΩ
VR1 50kΩ
VR2 2.5kΩ
C1 0.001µF
C2 0.01µF
C3 10pF
D1 1N4148
Q1 2N3904
IC1 NE555
IC2 LM7805
M1 1mA 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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