"基于RFID的教室门禁系统设计与实施"

his project is about the design of a classroom access control system based on RFID technology. The system is built around the STC89C52 microcontroller, with components including a buzzer control circuit, circuit indicator, power door lock control circuit, and an 8-digit display circuit. The access control system consists of a CPU reset circuit, power indicator, operation instructions, crystal oscillator circuit, door lock control circuit, reader module, and LCD display module. The system operates in two modes of access control: card-swiping and keypad entry. In the card-swiping mode, authorized access is granted when the IC card is recognized, displaying the card number on the LCD module and unlocking the door through a relay, while unauthorized attempts do not display the card number and keep the door locked. In the keypad entry mode, the correct password unlocks the door through a relay, while incorrect attempts trigger an alarm. This system is designed for ease of use, with outstanding performance and practicality. Overall, it provides a secure and efficient access control solution for classroom environments. Key words: access control system, microcontroller, card reader, IC card.