rfid based attendance system using arduino

Abstract

The term RFID (radio frequency identification) is a one type of electronic device includes a small antenna and a chip. This device is used to transmit the information like persons, animals, books or any stuff between reader and RFID tag using radio frequency electromagnetic fields. It is capable of carrying 2k bytes of data. There are different kinds of RFID systems in the market, which consist of an antenna, a transponder and a transceiver. Some types of tags can be located close to the RFID reader and some tags can be located far from the reader. The operating frequency ranges of these devices mainly include low, mid and high ranges. The low frequency range is from 30kHz to 500kHz, mid frequency range is from 900kHz to 1500kHz and high frequency range is 2.4kHz to 2.5kHz.