Simple Pulse Generator circuit by IC-555

      This is a simple pulse generator circuit or standard astable oscillator circuit for IC 555 timer,NE555N IC.
Use for digital Logic circuit. IC 555 use voltage supply 5V to 15V.
the output frequency will be approximately 1kHz and the duty cycle 50-50, The output’s frequency is control by R1.


      The values in the formula are expressed in ohms, farads, seconds and hertz. This formula is much simpler than that of the previous circuit.
Detail more, Please read in this image circuit.

Simple Pulse Generator by IC 555 Timer

Other circuits involved.

  1. Oscillator Generator
  2. IC555 astable oscillator
  3. Audio generator is controlled by light
  4. Tapping morse code circuit
  5. 555 timer audio alarm circuits

26 thoughts on “Simple Pulse Generator circuit by IC-555”

  1. I need a 555 circuit that must be triggered on by a switch and stay on for about 20 seconds.
    Will you email me a diagram how to do that?

  2. I need a sch. of an astable 555 with an on time of .75sec., a dwn time of 5sec, or there abouts. All I need is values of r1, r2 and c1. Can you help me?
    I would greatly appreciate it.
    Bob W.

  3. i need clock pulse for counter circuit for increment by one counter ic 74hc393 so please tell me how can i do……

  4. I need a 555 circuit that must be triggered on by a switch and stay on for about 20 seconds.
    Will you email me a diagram how to do that?

  5. Your site and projects are awesome.You are teaching me electronics the no one could.
    Paul Perold
    Cape town
    South Africa

  6. each time i used to read smaller posts that as well clear their motive, and that is also
    happening with this post which I am reading at this time.

  7. I want a pulse generator for time period of about 0.5sec please mail me the circuit. And further details of it

  8. i want to replace ic mm 5369 with ic 555 in my digital clock using mm 5387 clock chip.please give me a circuit for this purpose.Presently it runs on 12v dc.the ic mm 5369 is not available so please help me.

  9. Hi Masterlogic,
    Thanks for your feedback.
    You can use both ceramic and mylar capacitor. or MKP or MKT that good capacitor which is expensive type.

  10. momename, can you create a variable frequency clock pulse that varies from 1Hz to 60Hz. Can you send it to my email? I badly need it. Thanks and more power. 😀

  11. If the circuit is implemented without using 555 timer ic; then we need to use comparators, SR latch and transistor. So how would the two circuits differ if SR latch is implemented using NAND gates or NOR gates?

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