In this DIY we are going to make a device to unlock our computer running on any operating system using an RFID card.
We just needed to pass the card above the RFID reader, in my case I have placed it inside my laptop housing.
As you can see in the picture, I have removed the CD drive and placed an SSD and on top of that you can see our RFID reader with Arduino Leonardo.
I just removed all the header pins from the RFID reader and also from the Arduino Leonardo, to make it fit inside my Laptop casing.
Then I soldered all the connections using thin wire and sticked it together with hot glue, now the full hardware is so thin about 5 to 6mm.
As shown in the circuit give the connections as follows:
- MOSI of Arduino to MOSI of RFID
- MISO of Arduino to MISO of RFID
- PIN 10 of Arduino to SDA of RFID
- PIN 9 of Arduino to RESET of RFID
- SCK of Arduino to SCK of RFID
- 3.3V of Arduino to VCC of RFID
- GND of Arduino to GND of RFID
After building the circuit please upload the program and open serial monitor and scan your RFID which you need to set as your computer key and note down the RFID number which is printed in the serial monitor and update that number in the program (line 10).
Also update your password (line 48) in the program and upload the program again. Now we are ready to go.