Introduction: RFID Bank Safe

RFID is radio frequency identification. A Bank Safe is a safe for valuables. Putting two together makes A bank safe even more safe. Heres how to build one out of Arduino components and a little bit of garage work.


  • 1x Arduino Genuino Uno/Uno board
  • 1x Breadboard
  • 1x Servo Motor
  • 2x LEDs (best one red one green)
  • 1x LCD with I2C module
  • 1x RC-522 RFID scanner
  • Jumper Wires
  • Cardboard

Step 1: Step 1: Wire the Stuff

The wires above show how to wire the LEDs, the Servo motor and the RC-522. That image is by Michael Klements. You can look at the original on . With the LCD, on the I2C module, it has four pins: VCC, GND, SDA and SCL. The VCC should be connected to the 5V output. GND is the negative pins. SDA and SCL are connected to A4 and A5.

Step 2: Step 2: the Code

At line 11 of the code (which is highlighted above, you can change the serial numbers and the grant codes of the RC-522. That means any RFID tag with the same number that matches can trigger an output. In order to find this number, you can use the folder that I have attached in examples. Put all of the top files into one folder. Its a library, so compress it into a zip. It's from the same person.


Step 3: Step 3: Build the Box

Really? I don't think we need to go through this. Get a box, carve a door and three holes, 1 for the LEDs, 1 for the LCD and 1 for the RC-522. Then use a bit of that cardboard to make a latch that the servo can hook onto to look the safe. Then done. A little bit of cable management for the cherry on top. I don't know why I can't upload this image! Sorry :)