RFID Door Lock With Arduino





Introduction: RFID Door Lock With Arduino

Basically this project is all about how to make your house,office place and even your personal lockers.This projects makes you understand arduino with RFID and how are the connected together .

So lets get started

Step 1: Things Required

  1. Arduino uno R3
  2. RFID reader RC522
  3. RFID cards
  4. Plunger
  5. relay
  6. Jumper wires
  7. Battery 9 Volts

Step 2: Connecting RFID

ARDUINO to RFID reader

pin 11 to MISO

pin 12 to MOSI

pin 13 to SCK

pin 10 to NSS

pin 9 to RST

These were the connection from Arduino to RFID reader

Step 3: Relay

As we are using a plunger it requires 9 volts to work and as we all know an Arduino uno only has max 5 volts . In this case we will then use a relay so we can make it work too.We are using the plunger as a lock .So here is the connections for it :

Arduino to Relay

pin 4 to pin S

5 Volts to pin +

Ground to pin -

Now comes the power in and power out switch

Power in switch should be connected with the battery and power out one with the plunger and connect one of the plunger wire direct with the battery.

Step 4: Code


This is the link for the code

uplode the code to arduino and enjoy having an rfid code thanks



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    do you have videos tutorial?

    Or can we use adriuno mini

    Bro can i use 12 volt door lock relay to lock the door with replacement of plunger or can i use 12 volt charger to connect with relay


    Is it possible to use more than one RFID reader on the same Arduino ?
    I want to control the access of my portal from the street, from my garden and from my house.

    I am not able to find plungers...can you help me with that !

    dude it is a simple car plunger which helps open the door

    Thanks for the instructions. But is this the correct code? Thanks

    Hello ,where you get the plunger ? Ebay ?