clap switch projects ready made kit this circuit enables you to switch on/off any gives load by just clapping your hands. the load can be any appliance such as a fan light , etc. the sound produced by the clap of the hands is converted into an electrical single by the condenser microphone. transistor Q1, Q2, Q3, amplify the signal and transistor Q4 triggers the relay, the triggering of the relay enables its contacts to go on/off. with every clap the relay is triggered.
5)12 volts relay
7)9 volts battery cap