Square wave generator with 7400 series chip

This is a simple and useful oscillator, built, using  just a 7400 chip ( 4 NAND gates ) and very few other components.



  1. written by: umang shah on March 20, 2016 at 7:52 am - Reply

    We are trying to generate a square wave form using 7400 IC for one component of out project can you please share the formula for timeperiod so that we can manipulate….

    • written by: Mihai on March 22, 2016 at 1:17 am - Reply

      The frequency of an astable multivibrator is f = 1/[ln(2)*(R1C1+R2C2)] and in practice is often approximated to f ≈ 0.7/RC.

  2. written by: Osim on August 3, 2018 at 10:07 am - Reply

    Thank you!!! A lot!

    • written by: Mihai on August 5, 2018 at 2:54 pm - Reply

      You are welcome!

Leave a Reply

Your email address will not be published. Required fields are marked *

39 − = 32

This site uses Akismet to reduce spam. Learn how your comment data is processed.