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RFID based Attendance system using Arduino and External EEPROM

In this post we are going to learn how to build a RFID based attendance system using Arduino development board, RC522 RFID reader module and external EEPROM. We will take a brief look at RC522 RFID module, external EEPROM and other circuit modules that makes this proposed RFID attendance system work.

RFID card based system is so commonly used in our modern life such that you must have come across at-least one point in your life at schools, offices, train stations, libraries etc.

In this post we will learn how to build an attendance system that can store attendance of 100 people and 255 attendance counts per person.

Circuit description:
The proposed circuit consists of the following module that makes this RFID attendance system possible:

·RC522 RFID module.

·External EEPROM AT24C256.

·RTC module DS3231 / DS1307.

·I2C LCD module.

·Buzzer and buttons.

Now let’s take a look at them one by one.”

Link to article