50Hz 60Hz Frequency Generator Circuit Using Crystal Oscillator

50 Hz 60 Hz frequency generator circuit using crystal oscillator

You can generate 50Hz or 60Hz using this frequency generator. This
oscillator can be used as the front end of circuits that require
precision pulses.

A crystal is used in the circuit to generate clock pulses. The circuit
uses two counter ICs CD4060 and 7490 to divide the basic frequency to
generate 50Hz or 60Hz pulses.

60hz 50hz frequency signal generator circuit using crystal oscillator

PARTS LIST R1 2.2MΩ C1  24pF C2  24pF C3  0.01µF C4  47µF 16V C5  0.1µF
C6  100µF 16V XTAL  4.096MHz or 4.9152MHz Crystal IC1  CD4060 IC2  7490
(SN74LS90N) IC3  7805 Regulator “X” is a test point.


CD4060 act as an oscillator and frequency divider here this is arranged
to divide by 8192Hz which gives 600hz when you using 4.9152MHz crystal
or 500hz when you using 4.096MHz crystal. That frequency further divided
by 10 using 7490 IC is to obtain 50Hz or 60Hz output.

4.096MHz Crystal

4.9152MHz Crystal

CD4060 Counter Divider and Oscillator





You can check CD4060 crystal oscillator and frequency divider work
correctly via “X” test point. when you use 4.096MHz crystal “X” point
gives 500Mhz output and 4.9152MHz crystal gives 600Hz output. If you
don’t need a test point you can ignore it.

 7490 SN7490A SN74LS90 SN74LS90N 7490N BINARY COUNTER IC
7490 SN74LS90N 7490N BINARY COUNTER IC pin configuration

This frequency generator circuit gives 50Hz as output when the crystal is 4.096MHz. Crystal must be 4.9152MHz if you need 60Hz.

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