RADIO FREQUENCY IDENTIFICATION (RFID)

RFID Reader Conection of RFID 

The Reader and Smart Card

     Radio Frequency Identification (RFID) is a generic term that is used to describe a system that transmits the identity (in the form of a unique serial number) of an object or person wireless, using radio waves. a basic RFID system consists of three components are an antenna or coil, a transceiver (with decoder) and a transponder  (RF tag ) electronically programmed with unique information. 

     The RFID reader is a passive RFID reader it operates using 12VDC. it can read RFID card within 3mm distance. The operating frequency of the RFID reader is 125 kHz. it communicates with PIC using Wiegand 26 Communication. Minus the start and stop bit, the ID content is in 3 bytes form (24 bit). There are 3 wires used to control the RFID reader.