Here are the 2 simple circuits named clap switch circuits which are based on clapping. These circuits are useful in switch ON/OFF any devices by just clapping without any movement from your place.

Here is the circuit of a highly sensitive clap switch that can be operated from a distance of up to 10 metres from the microphone. Signals picked up by the microphone are amplified by transistors T1, ...

Remote control by radio and light waves has come along to operate from afar everything from TV to garage doors. This week Sonus Corp. will add a new tone to remote control. It will start distributing ...