DIY Arduino Digital Code Lock


Components required :

1) 1 x Arduino Uno R3 Board (Buy here) or 1 x Arduino Development Board (Buy here)  
2) 1 x 16×2 LCD with Breakout Board (Buy here)
3) 1 x 170 Point BreadBoard (Buy here)
4) 1 x Single Channel 5V Relay Module (Buy here)
5) 1 x 4*4 Keypad Matrix (Buy here)
6) 1 x 5V Small Buzzer (Buy here)

1) Power Source (Battery with Snapper/DC Adapter) : 9-12V DC (Buy here)
2) Tools (Buy here)
3) Jumper Wires (Buy here)

Download Codes & Circuit Diagram.  

In case of any questions or queries, feel free to post below.

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2 thoughts on “DIY Arduino Digital Code Lock

    • Mandeesh Singh says:

      Hello Patrick,
      For that, you’ll have to store the password in EEPROM and update it using EEPROM Write functions.
      It’ll involve modifying the original code.

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