Arduino Tutorials

Arduino RFID Door Lock | Security Access

How to build a Arduino System Electric Door Lock and RFID with Arduino

In this tutorial, we will learn how  to build a Arduino System Electric Door Lock and RFID to authenticate, so your RFID tag will act as a key.

If you place wrong RFID card near RFID reader a buzzer will beep to alert about wrong card. If you are new to RFID first read its working an interfacing with Arduino.

Hardware Required :

Project circuit :

Project circuit diagram is shown below.

Radio-frequency identification, or RFID, is a wireless system that uses electromagnetic fields to transfer data from one object to a different , with-out the 2 objects touching. You can build an Arduino that reads com-mon RFID tags and cards to make access systems and to regulate digital outputs. you’ll have used an RFID card before, like an access card that you simply simply use to unlock a door or a conveyance card that you hold ahead of a reader on the bus.

Inside RFID Devices

Inside an RFID device is a tiny microcircuit with memory which will be accessed by a specialized reader. Most tags don’t have A battery inside; instead, they’re powered by energy from an electromagnetic field produced by the RFID reader. This field is transmitted by a fine coil of wire, which also acts as the antenna for the transmission of knowledge between the cardboard and therefore the reader.

Arduino RFID Door Lock | Security Access

Link to the Code :

Downlonad the MFRC522 Library :

Demonstration :


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