![]() We will use 125Khz Passive RFID cards which holds the unique ID data. Few of them use different frequency for communication purpose. Different kind of RFID tags with a different kind of shapes and sizes are available in the market. There are three types of RFID tags available, Passive, Active or Battery-assisted passive. EM-18 module use Oscillator, demodulator and data decoder to read data from a passive card. EM-18 RFID module use 125 KHz RF frequency to read passive 125 KHz RFID tags. In this project, we chose EM-18 RFID module, which is small-sized, low cost, and power efficient module. We will simply read the unique identification no. Here we are using PIC Microcontroller PIC16F877A for interfacing RFID. ![]() ![]() If we select a microcontroller without UART, we need to implement software UART. ![]() To read the Passive RFID cards and tag, we need a microcontroller with UART hardware. RFID is very convenient and easy technology. RFID module can read or write small amount of data into a Passive RFID tag, which can be used in identification process in various systems like Attendance system, security system, voting system etc. ![]() RFID stands for Radio Frequency Identification. ![]()
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