29 Comments

  1. June 20, 2012 at 9:56 am

    dawit

    10 QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ that is perfect

    Reply
  2. June 30, 2012 at 12:20 pm

    Pravin

    The components required are not given. can you mail me

    Reply
    1. July 2, 2012 at 8:26 am

      Sagar

      The components are given on the schematic. Those are the required components.-

      Reply
  3. July 6, 2012 at 5:32 pm

    Chirag

    Nice circuit, working perfectly. Can you tell how to use it for ac 220V bulb.

    Reply
    1. July 9, 2012 at 10:51 am

      Sagar

      check here: http://www.buildcircuit.com/clap-switch2

      Reply
  4. July 16, 2012 at 12:49 pm

    A.SAU

    Sir,
    5V realy not avelable in my local market.
    Can i use 6V realy in that place?
    If , it is not possible. Please harry e-mail me what i do in that case. Please please harry. . .

    Reply
    1. July 18, 2012 at 9:31 am

      Sagar

      You can use a 6V relay in place of 5V relay, but your power supply should be 6V

      Reply
      1. June 8, 2013 at 8:58 pm

        mazhar abbas

        sir how are you . sir i have made clap switch but it is not working. what would be the problem. the circuit is correct i have checked so many times. please help me sir as soon as posible

        Reply
        1. June 9, 2013 at 8:08 am

          Sagar Sapkota

          I cannot help you without seeing the circuit.

          Reply
  5. September 1, 2012 at 8:14 am

    Ani

    100nF is not avelable in my local market.
    Please suggest me, what can i do?

    Reply
  6. October 16, 2012 at 4:08 am

    vishnu

    sir, can we use 12v relay instead of 9v relay by 9v battery power supply ?

    Reply
  7. November 1, 2012 at 3:58 pm

    Joel

    Hi…. i have did a clap switch which is somehow different from the above circuit. I use a comparator and a differentiator as a replacement for the 555 timer and the usage of RC delay circuit. An NMOS acts as a switch to light up the LED when the RC discharge is above the threshold voltage. The LED will light up for sometime until RC discharged is decayed to below the forward voltage of the LED.
    The question here is: without the use of a relay, how do i stop the light from fading when my first clap occur and how do i off the LED when my second clap occur? Please kindly advice.

    Reply
    1. November 1, 2012 at 8:46 pm

      Sagar Sapkota

      If you know CD4017 or CD4027, you can use it to latch without using relay. Try a D-flip flop or this circuit: http://new.electronicsforu.com/newelectronics/circuitarchives/view_article.asp?sno=298&title=&id=265&article_type=1
      In this project remove IR sensor and add the electret mic circuit and try it once. When you clap, the circuit triggers at pin2 and CD4027 latches.

      Reply
  8. November 25, 2012 at 1:23 pm

    Jithin

    sir this project is awsom…
    i have a doubt.. what is the role of capacitor c3 of BASIC CLAP SWITCH…

    Reply
  9. January 1, 2013 at 5:02 pm

    ajin

    super circuit

    Reply
  10. January 2, 2013 at 5:08 pm

    Daniel

    i want to know what is the specification of this electret microphone?
    In brazil i didnĀ“t find nothing that works equal…

    thanks

    Reply
  11. January 8, 2013 at 1:56 pm

    akhilesh

    Sir,

    I made clap switch using IC555, but its flip-flop switch,means when clap just LED lid and off again within a second, while I want to use this circuit with toy car so my purpose not solve. I got this circuit from http://www.minibread.org/wp-content/uploads/2012/04/basic-clap-switch.jpg.

    what modification I do, plz send circuit diagram.

    Reply
  12. May 9, 2013 at 3:45 am

    Timang

    is it okay if your transistor is so hot and smells bad?

    Reply
  13. May 22, 2013 at 10:44 pm

    helmi

    working perfectly!..10q..

    Reply
  14. July 23, 2013 at 10:42 am

    shweta

    hello sir,
    can u please upload the circuit connecting video for this circuit plzzzzzzzzzzzzzzzzzzz as u have done for simple clap circuit……………

    and can we use normal bread board instead of the mini bread board

    plz donot forget to upload this circuit being connected by u neatly as previous one ……………

    Reply
  15. August 5, 2013 at 10:58 pm

    kartik

    i just tried this circuit its working fine but i want to use it for my room light , so there is a problem its not sensing my clap from distance i have go very near to do it .

    give a solution soon,
    eagerly waiting

    Reply
  16. November 28, 2013 at 4:24 am

    edward

    sir i make the circuit but mine just light even without the condensor mic and this condensor mic heats very fast and i cant even touch it as if the timer ic didnt recognize amplified signal from the mic……wat shall i do sir i even had check my biasing and its correct….

    Reply
  17. February 20, 2014 at 3:48 am

    Make Hair Bows

    Hey i really loved the design and style. Thought the one
    thing had been really cool.

    Reply
  18. March 27, 2014 at 3:23 am

    Custom Garage

    This is a thing that everyone should do. It’s a faster and also easy
    option to keep things straight forward.

    Reply
  19. November 1, 2014 at 4:05 pm

    Ebey Abraham

    What is the value of D2??

    Reply
  20. November 2, 2014 at 3:01 pm

    Ebey Abraham

    Can i use 12V relay

    Reply
  21. November 6, 2014 at 6:17 pm

    gautham

    why do we have two LED’S in the clap switch with monostable circuit

    Reply
  22. April 9, 2015 at 8:39 pm

    ELA

    witch transistors can i use instead of BC547/ BC548????? please replay

    Reply
  23. June 17, 2016 at 5:43 pm

    NAYAN BIKASH BARMAN

    I AM TRYING TO MAKE A CLAP ON AND OFF SWITCH WITH ONLY ONE IC i.e. A NE555 TIMER. CAN YOU SUGGEST SOME GOOD CIRCUIT DIAGRAM TO MY MAIL AND I AM FINDING SOME DIFFICULTIES IN GETTING A BD139 TRANSISTOR . CAN YOU NAME ANY OTHER TRANSISTOR THAT CAN SUBSTITUTE THIS BD139. AN EARLY REPLY IN EXPECTED FROM YOUR SIDE . THANK YOU

    Reply

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