Design and construction of electronic clap switch

Abstract

This paper deals with the design and construction of an electronic clap switch circuit that can be used to switch ON/OFF electronic devices in the house, offices and industrial equipment. The system is designed in several units which are integrated to form the electronic clap switch circuit system. These various units are, the power supply unit, unit is achieved through the use of a 220v–24volts step-down transformer connected to a bridge rectifier model 2WWG whose output terminal is connected to a polarized capacitor rated 330μf and finally connected to a 12volt positive output voltage regulator with the number 7812 which is needed for this construction. The condenser converted the sound produced to electrical energy through a sensitive element in the condenser known as a diaphragm. The amplification unit was achieved by the use of an N-P-N transistor numbered BC547. Its function is to increase the electrical energy produced by the microphone which is known as the mic-level signal. The activation units were achieved by the use of a device known as a relay which triggered the electrical lamp. The activation is achieved when the first clap signal is generated to the microphone, the lamp or electric bulb is turned ON while that of the second clap turns OFF the light. The system (electronic clap switch circuit), is realized with some other components such as a Veroboard, looping wire, soldering lead and LED lamp or bulb used to indicate the status of the system.