IntroductionWhen it comes to working with Arduino, one of the most popular components is the LCD module. Among the various types available, the 16x2 and 20x4 LCD modules are two of the most commonly used. Understanding the differences between these two modules can help you choose the right one for y

Understanding the I2C LCD ModuleThe I2C LCD module is a powerful tool that simplifies the connection of an LCD to an Arduino. Unlike traditional parallel connections, which require multiple pins, the I2C interface uses only two wires—SDA (data line) and SCL (clock line)—to communicate with the micro

Understanding the PCF8574 I2C LCD ModuleThe PCF8574 is an I2C I/O expander that allows you to control multiple devices using only two wires: SDA (data line) and SCL (clock line). This is particularly useful when working with LCD displays, as it reduces the number of pins required on your microcontro