# 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.

f=1/(1.4*R*C).

The values in the formula are expressed in ohms, farads, seconds and hertz. This formula is much simpler than that of the previous circuit.

Other circuits involved.

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

1. abdul says:

very nice & good service i hope people will happy with service

2. Hi, abdul
Thanks you.

3. James McQueen (Mac) says:

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?

4. Bob W. says:

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.

5. jax says:

special thanks!
very very nice sit!

6. Imran Sheikh says:

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

7. mahesh says:

8. jojo says:

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?

9. Paul says:

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

10. sakib says:

which is R1?

11. Hi,
I am sorry for late answer you.

R1 = VR1

This is simple circuit.

12. Hi,Paul

13. 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.

14. Deepthi says:

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

15. Motamarri Sri Ranganayakulu says:

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.

16. meow says:

hi what values should I use to make a 8hz oscillator somewhere near schumann resonance?

17. some componet failure any iam don’t identify

2 qustin
1. duplicate component
2. Circuit wrong connected

18. Hi Solo
This circuit is correct.

19. MasterLogic says:

What cap did you used? Ceramic or mylar? Thanks btw

20. Hi Masterlogic,
You can use both ceramic and mylar capacitor. or MKP or MKT that good capacitor which is expensive type.

21. MasterLogic says:

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. ðŸ˜€

22. MasterLogic says:

Thank you man! I really appreciate it. More power

23. Looking for a simple pulse generator to build or buy for experimental work.please advise on who can assist, Regards

24. anon says:

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?