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 ...

First, connect the 4X4 keypad to the Arduino; connect the first six pins on the 4X4 keypad with the A0 and A5 pins on the Arduino. Then connect the last two pins on the 4X4 keypad module to digital ...

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 ...