DESIGN AND CONSTRUCTION OF AN ADVANCED 40WATTS WIRELESS PUBLIC ADDRESS SYSTEM

Abstract

This paper presents the design, development, and implementation of an advanced wireless public address (PA) system, emphasizing its components and operational functionalities. The system is composed of several integral units, including a power supply unit, an FM transmitter, an FM receiver, a preamplifier stage, and a power amplifier stage. The process begins with an audio signal captured by a microphone and converted into an electrical signal. This signal is wirelessly transmitted through the FM transmitter and subsequently received by the FM receiver. Upon reception, the signal undergoes demodulation, after which it is passed through the preamplifier stage for initial amplification and conditioning. It is then further processed in the power amplifier stage, which delivers a robust 40-watt output to an 8-ohm loudspeaker, ensuring clear and powerful audio delivery. To expand functionality, the system incorporates an additional FM transmitter operating at 87.5 MHz, enabling enhanced flexibility and improved performance. Overall, this design provides an effective and reliable solution for modern wireless public address applications, offering efficient audio transmission and high-quality sound reproduction.