The Complete circuit diagram for our Arduino based Digital Keypad Door Lock project is shown below. First of all, we start from the brain of this project which is the Arduino UNO board ... servo motor ...

By the end of this tutorial, you'll be able to read the state of the keypad and determine which key has been pressed. We'll cover the required hardware, wiring diagram ... 4x4 membrane keypad before ...

main.ino: This is the primary Arduino sketch file. It contains the logic to read the keypad inputs and control the 7-segment displays using the CD4511 decoders and the 74HC595 shift register. Assemble ...