Project Methodology
Introduction
The design of the circuits is a crucial aspect of the Lecturer Availability System project. It involves creating circuits that enable communication between components, such as the Arduino Uno, RFID reader, LCD display, and wireless transceivers. These circuits ensure the efficient transmission and reception of data, ultimately contributing to the system's overall functionality. The system consists of three main circuits: the transmitter circuit, which sends data from the RFID reader to the receiver; the receiver circuit, which processes the data and displays it on an LCD; and the power supply circuit, which provides a stable power source for the entire system.
Circuit Design
Transmitter Circuit
The transmitter circuit, shown in the schematic, uses Arduino Uno as the main component along with an RFID reader for input and an LCD for output. The Arduino Uno is programmed to process data, display it on the LCD, and send it to the receiver circuit.
Receiver Circuit
The receiver circuit uses an Arduino Uno and a wireless transceiver as the main components. Upon receiving data from the transmitter, the Arduino processes it and displays the output on the LCD. The circuit ensures seamless communication between the transmitter and receiver.
9V Power Supply Circuit
The 9V power supply circuit includes components like the IC 7809, diodes, capacitors, transformer, and LED. It regulates a 12V input to a stable 9V output. Key components like diodes ensure protection, while capacitors filter voltage ripples, providing clean and reliable power to the system.