The design and construction of clap switch device
Abstract
At the time when someone claps in front of the microphone, the sound signal is converted into the electrical signal by the condenser microphone. This weak signal is then amplified by a transistor. The amplified signal provides a negative pulse to the timer turns on the counter for the predetermined time, that is set by the capacitor and the resistor and after that the load would receive the electrical signal.First we take a condenser microphone that senses the sound of the clapping. Next is the amplifying stage that will amplify the sound received from the microphone by the transistor. One IC have been used to sense the clap and the output of the IC switches on the load.