The I2CKeyPad library implements the reading of a 4x4 keypad by means of a PCF8574. Smaller keypads, meaning less columns or rows (4x3) can be read with it too. Since 0.3.2 the library allows a 5x3, ...

This project uses a ESP32, 4x4 matrix keyboard, an SD card reader, and a RGB LED. The goal is to create a macro / password keyboard with 8 banks of 15 key mappings. The star (*) key is used for ...

Programming is always fun and Arduino is a wonderful platform if you are just getting started with Embedded programming. In this tutorial we will build our own calculator with Arduino. The values can ...

What is a 4x4 Matrix Keypad? Before we 4x4 matrix keypad interface with the microcontroller, first we need to understand how it works. Matrix keypad consists of a set of Push buttons, which are ...