About clap activated switch.

Discussion in 'The Projects Forum' started by MMH, Mar 9, 2013.

  1. MMH

    Thread Starter Member

    Feb 8, 2013
    143
    4
    Hello there everybody!!

    I was just thinking of making such a circuit(using NE555 and Transistors) that will turn on when I will clap once and turn off when I will clap Once again. Is that possible to do with only 555 timers and transistors?? I googled it and found one I liked. But will it work?? My parents might like it when I will use a relay to operate our CFLs with this circuit(as you know that my parents dont like me doing such things- and I am dependent on them - a grade 7 Guy:(:()!!
     
  2. dawg

    New Member

    Nov 15, 2009
    8
    0
    Hey mate
    Building is great fun, but I'm a bit lazy I simply bought one online

    And if your project doesn't work you can come back to the forum for help

    There are ready made units at some Canadian tronics store, Instructables, and fleabay
     
  3. MMH

    Thread Starter Member

    Feb 8, 2013
    143
    4
    Thanks for answering!!

    I prefer to make one rather than buy one asit is fun to make and use sth made by me:)
     
  4. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,997
    745
  5. sheldons

    Active Member

    Oct 26, 2011
    616
    101
    there are errors with the last circuit posted-no reset for the 4017 at all -the circuit needs a few changes -also the 470k resistor on the clk ip to ground-remove it .....
     
  6. MMH

    Thread Starter Member

    Feb 8, 2013
    143
    4
    Thanks for answering!!
    But cant it be done with only transistors and 555 timer? I dont have 4017s:):)
     
  7. MMH

    Thread Starter Member

    Feb 8, 2013
    143
    4
    I now am planning to make it using a toggle switch-
    http://www.buildcircuit.com/toggle-switch-using-555/

    If the switch is replaced by a pair of NPN transistors, and a speaker, shouldnt it work?

    My question is, whether I will connect the other lead of the speaker to the common ground or he emmiter of Q2. The transistors are BC547 not 2N3904.
     
    Last edited: Mar 14, 2013
  8. MMH

    Thread Starter Member

    Feb 8, 2013
    143
    4
    I at first thought that the speaker cannot generate enough electricity. I therefore connected it to a DC motor-it did not work-(When I touched its axle, the LED started lighting but then no matter what I did, It did not turnoff the LED), however when i connected it to a battery(1.5v one) it worked perfectly

    Can you give me some advice about how to make it work-meaning that it will Turn off when clapped once and on when clapped again.
     
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