Project 4: RFID Door Locking

 

 

 Project setup

Controller on the door 

System installation

Descriptions:

The principal of the project is to build a smart access system for door using RFID. The users need to use authorized card (Mifare card) to access that door or room. The card is operated at 125kHz or 13.6 Mhz depend on the RFID reader spec. Each card has its own identity number (ID) and can be programmed into microcontroller. This ID will be kept in the microcontroller memory and can be called anytime. The number of cards that can be installed to the system depend on the number of microcontroller memory. The bigger it has the higher ID may be installed. Only authorized person which registered ID is allowed to use the system.

The PIC will send a signal to unlock the solenoid/magnetic lock once it senses a correct ID. In this system, any Mifare cards including Touch n Go card (TnG) can be used as it has the same number of ASCII characters inside the card. The system may be upgraded by adding RF controller (remote) if the users decide to open the door from far without touching the reader.

Prinsip operasi
Asas prinsip operasi iaitu pengguna perlu menggunakan kad/tag untuk mengaktifkan RFID reader.
Setiap kad/tag mempunyai ID tersendiri dimana ID ini akan disimpan dalam memori PIC. Hanya kad berdaftar shj yg dibenarkan utk akses kpd pintu ini. Frekuensi reader yg digunakan adalah 125kHz/13.6MHz. PIC akan scan data2 ID yg dihantar melalui reader ke PIC. PIC akan mengarahkan locking system utk buka/tutup bergantung kpd akses yg telah ditetapkan.

Jenis locking system yg digunakan adalah solenoid/magnetick lock. Kad Touch N Go (TnG) juga boleh digunakan untuk sistem ini. Projek ini boleh diupgrade dgn menambah komponen RF (remote controller) jika pengguna ingin membuka pintu dr jauh tanpa meletakkan kad ID kpd reader.