RFID-Based Library Entry Logger

Problem statement

Library usage is often recorded manually in logbooks, which is time-consuming and not easily analyzable.

Abstract

This project uses RFID cards assigned to students for automatic logging of entry and exit from the library. When a student taps the card on the reader at the entrance, the system stores the ID and time stamp in memory and shows a welcome message on an LCD. Basic stats like current number of users or daily count can be displayed.

Components required

• RFID reader (RC522) and RFID cards
• Microcontroller board (Arduino / similar)
• 16x2 LCD with I2C interface
• Buzzer and status LED
• EEPROM / SD card module (optional) for logs
• Power supply and enclosure

Block diagram

Working

When a card is presented near the reader, its unique ID is sent over SPI to the microcontroller. The program checks if it is already inside the library; if not, it logs an entry time, otherwise it logs exit. The display shows name or ID with a short message and may show current occupancy. Logs can be stored locally or sent to a PC for later analysis.

Applications

• Library and reading room entry systems
• Computer lab access logging
• Small-scale attendance systems
• Foundation project for access control