50 Hz Pulse Generator Circuit

Here is a Crystal based pulse generator that gives 50Hz clock pulses from its output. This circuit can be used as the front end of circuits that require precision 50Hz pulses.

The circuit uses two counter ICs CD4060 and CD 4017 to divide the basic frequency to generate 50 Hz pulses. CD4060 is the ripple free binary counter IC and its basic frequency is controlled by a crystal connected in its pin 10 and 11. A 4.9152 MHz crystal is used in the circuit to generate clock pulses. CD4060 divides the 4.9152 crystal frequency by 16,384 so that from the Q13 (output pin 3) 300 Hz clock pulses available.

These clock pulses are then fed into the clock input pin14 of CD4017. It is the Johnson decade counter that divides the 300Hz pulses into 50 Hz pulses which are available from its Q5 (pin1) output.

50Hz Pulse Generator Circuit Diagram

50Hz Pulse Generator Circuit Diagram


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    It should be astable or stereo-type. I mean double or 2 output. Why mono? Instead of stereo? But is it pure sine wave or square wave?


    I can’t see the 50HTZ generator circuit diagram or schematic here. Please send the complete drafted diagram of the circuit to me… Please state it, if is a pure sine wave or square wave. Although, I prefer pure sine wave. my Email is;

  • Johnny

    This is very interesting circuits to drive d gate of MOSFET and require low resistance of resistor for limiting at least 10ohms is better to change C1 becoz u cannot get exactly 50HZ …so trimmer is require in replace of C1 thanx

  • Neutron Spin

    Circuit would not work as drawn. Had to wire C1 and C2 where they are connected together to ground. Then worked fine. I am going to add trimmer capacitor in place of C1 to trim the frequency to exactly 50 Hz. The duty cycle of the square wave output is 16.6% and a clean pulse.

    • P. Marian

      Can you send me some pictures of the working circuit and one zoomed on the C1 and C2 pcb tracks?

  • Tariq

    Fine circuit

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