Electronic Theses and Dissertation

There are some alternative keys along with the technology development such as manual keys, digital keys, magnetic keys, and keys with RFID which will be discussed in this report. Radio Frequency Identification (RFID), a new technology, is used in security system application as one of its functions. Door keys with RFID, basically same with other door keys, normally have a sensor, a processor unit, and a magnetic relay. The different is the used input which uses Radio Frequenc y Identification (RFID). Door keys with RFID need hardware such as a RFID tag, a microcontroller, LCD and magnetic relays, and also arduino IDE software. The central controller is arduino UNO ATMEGA328 microcontroller. It processes the input data from the RFID reader. Whereas, the output controls the LCD and relay magnetic. There are some steps in the work procedure of RFID door keys. First, the RFID tag is read by the reader. Second, the identification number (ID) is sent by the reader to the microcontroller. In the microcontroller, the accepted data will blend. Third, it will be compared with saved data in the microcontroller memory. If the ID of the RFID tag is match with the saved ID of the memory, the microcontroller will activate the solenoid relay. LCD is used for monitoring the system process. Solenoid is used as a substitute of the manual key. RFID reader (ID-10) is able to read in maximum range of 6 cm. If there is an obstacle, the reading ability will reduce according to the obstacle material. If the obstacle is an iron plat, the RFID tag can’t be read because there is no magnetic field found which is used as power supply by the tag. Whereas, the selenoid will work at 3 second to open the door.

Keyword : digital keys, Radio Frequency Identification (RFID), RFID reader, door keys, tag card.

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