Electronic Tag Reader of 125 KHz RFID

Figure 1 

The circuit was built to read and decode the RFID tags with 125 KHz frequency using a single low cost ATtiny2313 ATMEL microcontroller.

After the tag has been read and decoded, the code will be transmitted in the form of ASCII characters through the serial output. The relay will produce a pulse of 1.5 seconds if the RFID code is the same as the recorded code in the micro non-volatile memory. This operation is acting as an electronic lock. After the programming of the microcontroller, the first tag is where the code stored in non-volatile memory is taken from which is read from the circuit.

The schematic diagram is contained in the downloadable zip file which also includes the layout of the printed circuit board that has single face and PDF 1:1 format, and the object file that will be burned in the micro. This circuit has been published in May 2009 on an Italian magazine “CQ Electronica”.

The contents of the zip file includes schematic diagram in PDF format, master plan, arrangement of circuits, HEX file, 5 batch files, photo of mounted circuit, text file, and interface scheme to PC.

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