The Basic necessity of security can be attained by designing various door locks such as mechanical locks or electrical locks. These kind of door locks are designed with one or more keys, but for locking a large area various locks are needed. Generally, traditional locks are heavy and that are not strong as they can damage simply by using some tools. Electronic locks are better over mechanical locks, to resolve the security problems that are connected with the mechanical locks. In recent days every device uses digital technology. For example, identification of digital device using token, door lock system using digital technology, automatic door opening and closing, automatic door lock systems, etc. These kind of systems is used for controlling the movement of a door without using a key. The proposed system uses an Arduino board and RFID readers The RFID reader is a wireless device used to transfer data for recognizing and tracking tags connected to objects. The tag includes electronically stored information.

Some kind of tags is run by electromagnetic induction from magnetic fields formed near the reader. RFID reader includes an RF module and it acts as a both TX and RX of radio frequency signals. The transmitter of this module contains an oscillator to make the carrier frequency. A modulator to intrude data commands upon this carrier s/L and an amplifier to increase the signal enough to wake the tag. The receiver of this module includes a demodulator to extract the reverted information and also holds an amplifier to support the signal for processing. A microprocessor is used to form the control unit, which employs an OS and memory of this module filter and stores the information. Arduino is a microcontroller board based on the Atmega family. It consist of 14 digital I/O pins. An Arduino board includes 6 analog i/ps, a USB, a reset button, an ICSP header a 16 Hz quartz crystal, and a power jack. It covers everything desired to support the microcontroller. It is simply connected to a computer with a USB cable.

Interfacing of RFID with Arduino can be done by the following steps The necessity of power supply for RFID readers varies from one product to another. There are many RFID readers are available in the market with 5v, 9v and 12v. But, here a 12v RFID reader is used for an interfacing. You may confirm the RFID reader and RFID tags are frequency compatible RFID gives mainly two possible outputs, one is TTL compatible o/p and another one is RS232 compatible o/p. A TTL compatible o/p pin can be connected to an Arduino board directly. While the output pin of an RS232 compatible must be changed to TTL using an RS232 to TTL converter The automatic door lock system circuit diagram using an Arduino is shown below. This circuit is mainly used for an interfacing of RFID reader with an Arduino. This project can be enhanced by connecting an LCD display to display the outputs. The circuit of this project uses three separate parts, namely a reader, a controller and door lock. Where a reader reads the RFID tags, a controller is used to accept the data from the RFID reader and control the o/p of the door lock and RGB LED.

When the door lock is placed on a door and tested with a battery to check the installation. hollow metal door frame insulationIn many cases we need a simple circuit on the door lock, that means the automatic door stops locked when there is no flow of current. bifold closet barn doorsWhen 12 volts DC is supplied through the electromagnet in the door lock system, a plate in the door lock offers a way to permit the door to be pushed open easily.sliding doors movie online trailer The RFID reader is placed on the outside of the door and it is detached from the controller confidentially so no one can avoid the security by breaking open the RFID reader and trying to short circuit the reader. fly screen door scotland

The controller of this project receives serial information from the RFID reader and controls the Door lock and the LED.garage door remotes cape town So, finally we can conclude that, when the person swipes with right RFID tag, then the access control system will be will be granted. replace door lock honda crvIn the same way, when the person swipes with an unauthorized RFID card, then the data will not be loaded and access will be denied.bifold closet doors barn Thus, this is all about RFID reader, an Arduino board, interfacing of RFID reader with Arduino, RFID based Automatic Door Lock System with Arduino Uno, circuit diagram of Automatic Door Lock System and working. We hope that you have got a better understanding of this concept.

Furthermore, any doubts regarding this concept or password based door locking system, please give your valuable suggestions by commenting in the comment section below.Here is a question for you, what are the applications of RFID reader. The main aim of the work undertaken in this paper is to sense the correctness of a secret code using the Arduino technology. When the correct code is entered through keypad, it lights a green LED in addition to operating a small solenoid which when powered, will strongly attract the metal slug in its center, pulling it into place, when the power is removed, it is free to move. ATmega168 is widely used because it supports wide range of system development tools such as C Compliers, Macro assemblers, Program Debugger/Simulators, In-circuit Emulators and Evaluation Kits . Its features includes: 23 general purpose I/O lines, 32 general purpose working registers, three flexible timer/counters with compare/capture/PWM mode, a SPI serial port, 16K bytes of in-system programmable Flash with Read-while-Write capabilities.

512 bytes of EEPROM and 1K bytes SRAM. In Idle mode CPU stops working while allowing the SRAM, timers/counters, USART, SPI port and interrupt system to continue functioning. It also has 6 channel 10-bit ADC, a programmable watchdog timer with internal oscillator .GNDGround voltage for the microcontroller chip.PORT B (PB7:0)  Port B is an 8-bit bi-directional I/O Port with internal pull-up resistors. As Inputs, Port B pins that are externally pulled low will source current if the pull-up resistors are activated.Depending on the clock selection fuse settings, PB6 can be used as input to the inverting oscillator amplifier and input to the internal clock operating circuit Depending on the clock selection fuse settings, PB7 can be used as output from inverting oscillating amplifier .PORT C (PC5:0) Port C is a 7-bit bi-directional I/O port with internal pull-up resistors. As inputs,Port C pins that are externally pulled low will source current if the pull-up resistors are activated .PC6/RESET :If the RSTDISBL register is programmed, PC6 is used as I/O pin.

Behavior of PC6 is different from other Port C pins.If RSTDISBL is not programmed, PC6 can be used as a Reset input. A low level on this pin for longer than the minimum pulse length will generate a reset even without the clock signal. Shorter pulses are not guaranteed to generate a Reset .PORT D (PD7:0)Port D is an 8-bit bi-directional I/O port with internal pull-up resistors. As inputs,Port C pins that are externally pulled low will source current if the pull-up resistors are activated. The Port D pins become tri-stated if the reset condition become active, even if the clock is running .AVCC AVCC is the supply pin for the A/D Convertor, PC[5:0]. It should be externally connected to VCC, even if the ADC is not used. If the ADC is used it should be connectedto VCC through low pass filter AREFAREF is an analog reference pin for the A/D convertor.XTAL1 It is an input to the inverting oscillator amplifier and the internal clock circuit.XTAL2It is an output pin from the inverting oscillator amplifier.