DESCRIPTION : This project demonstrates how to interface a 4x4 matrix keypad with an LCD (16x2) display using an Arduino board. The system captures key presses from the user via the keypad and ...

Hardware Requirements Arduino Board (e.g., Uno, Nano, or compatible) 16x2 LCD Display (HD44780 compatible, with I2C module or direct pins) 4x4 Matrix Keypad HC-SR04 Ultrasonic Sensor Piezo Buzzer 1x ...

LCD, Keypad, Enclosure Expansion Arduino Shield (video) 9:57 am March 6, 2015 By Julian Horsey ...

In other words, I’ve turned it into a numeric keypad. Related: Building a Wall/Desk Clock With a Customized Arduino and NeoPixel Displays As the phone sits idle with the handset in its cradle (called ...