Radio-frequency identification (RFID) is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tags.
It’s used for security applications and in tracking systems where a unique identification is needed .
The basic operation for this technology is that you have a RFID reader and a TAG , the reader sends radio frequency signals to the TAG, the TAG contains a coil to receive signals and special circuits to convert the signal to power used to energize the TAG. Then the TAG sends the data stored in it to the reader we build , and then the reader analyze data received and determine whether the user is valid or not.
The reader is connected serially to a host (computer) which holds an interface to be used by the system user to monitor the employees attendance and arrival and departure times also it’s connected to database to store these attributes.
The circuit was designed using EAGLE 5.7.0 software , and printed in our labs.