Digital Code Lock using Arduino

Security is a major concern in our day to day life, and digital locks have became an important part of these security systems. One such digital code lock is imitated in this project using arduino board and a matrix keypad. Components Arduino Keypad Module Buzzer 16x2 LCD BC547 Transistor Resistor (1k) Bread board Power Connecting wires In this circuit we have used multiplexing technique to interface keypad ...

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