Circuit Diagram of Interfacing Membrane Keypad with Arduino Uno. Connection of Arduino with 4x4 keypad is quite simple. Connect the 4 columns of the keypad to digital pins 4, 5, 6, and 7 on the ...

Arduino Uno (Well obviously) 16x2 LCD; I2C (This usually comes with your LCD) 4X4 Matrix Keypad (or whatever keypad you wish) Relay Module (If your only going to be connecting this to one hardware get ...