CLAP SWITCH

                    




                                            This is a circuit that can able to control the electronic devices by the clap. Once we clap the device will switch ON and on the next clap the electronic device will be OFF. With the help of a relay we can control home appliances like light fan etc…, This CKT consist of two transistors Q1, Q2and Q3, Q1 will be acting us an emitter follower amplifier and Q2 and Q3 will act us a bistable multivibrator

             Here , the micro phone sense the audio and Q1 makes an emitter follower amplifier this will amplify the audio received by the  micro phone and this is fed to the triggering of the bistable multivibrator . this controls the  ON and OFF of the device