Eva

Pushing a number on the keypad causes that number to light up on the digit display.

4 resistors

31 mm wires (220 Ohm)

1 breadboard

1 arduino mega 2560

1 74HC595

4-digit 7 segment display

1 membrane switch module

Use wires to connect everything as the wiring diagram shows.

Copy and paste this code to arduino.

Now push a number and watch it light up!