RFID is similar to barcoding in that data from a tag or label are captured by a device that stores the data in a database. The most notable is that RFID tag data can be read outside the line-of-sight, whereas barcodes must be aligned with an optical scanner. Applications RFID is used in many applications like attendance system in which every person will have their separate RFID tag which will help identify person and their attendance. RFID is used in many companies to provide access to their authorized employees. It is also helpful to keep track of goods and in automated toll collection system on highway by embedding Tag having unique ID on them.

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Many different applications are implemented in various sectors, and used for very different purposes. RFID enables wireless data collection by readers from electronic tags attached to or embedded in objects, for identification and other purposes. Circuit schematic and Arduino Sketch source code are provided here. The reader transmits radio frequency when powered ON.

When the tag is placed near the reader, the RFID tag will receive the radio frequency via the antenna inside tag. The radio frequency received will be converted into electrical power that is enough for the tag to transmit the data back to the RFID reader.

Further, the reader will transmit the tag ID to the external device by serial communication. A wide range of reader modules are now available. The most common and easy to use reader is EM This uniqued ID is essential in the next skecth!

Thanks to Internet! Everytime the tag values match, D13 goes high for 5 seconds. The Relay can be used to control an external load, like a door-striker. Posted in Microcontroller Circuits Tagged rfid Post navigation.


How Does RFID Works?



EM-18 RFID Reader Module Interfaced With Arduino Uno


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