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Things you need

Arduino uno

4×4 keypad

Breadboard

Breadboard wiers

2×16 liquid crystal display

How to build it

This should be simple
at first, we just include keypad(in order to use keypad) and liquid crystal (in order to use LCD) library

after that we set up the LCD pins

and we also set up the keypad Row and Num and Keys and Pins (you might need to change these if your keypad is different)

in void loop we wait for the person to press any keys and if they did, we display that on LCD  also if the person pressed * we clear everything

simple & easy

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