Overview This project implements a basic calculator using an STM32L432KC microcontroller, a 4x5 keypad, and a 16x2 LCD. It performs basic arithmetic operations: addition, subtraction, multiplication, ...

Second we need to tell the board which type of LCD we are using here. Since we have so many different types of LCD (like 20x4, 16x2, 16x1 etc.). Here we are going to interface a 16x2 LCD to the UNO so ...

Because a functional keypad does not require power, it can be connected to any 8 pins. Now, we will discuss about I2C 16x2 LCD. I2C LCD is a multifunctional electronic module with a 16-character per ...

This Arduino project uses a 4x4 keypad and an I2C LCD display to create a simple calculator. It supports basic operations like addition, subtraction, multiplication, and division. Users input numbers ...

Circuit and working. Complete circuit diagram of the single-wire 4×4 matrix keypad using AVR is shown in Fig. 2. It is built around step-down transformer X1, 16 pushbutton switches (S1 through S16), ...