In this lesson, we learn how to use the LCD1602 and LCD2004 modules with Arduino. We begin by introducing the LCD modules and exploring the types of characters that can be displayed. Next, we learn how to create custom characters for personalized outputs. Following this, we build a simple counter and use the DHT11 sensor to display temperature and humidity readings on the LCD. Additionally, we measure DC voltage using a potentiometer and display the value on the screen. Lastly, we integrate the HC-SR04 Ultrasonic Sensor to measure distance and show the results on the LCD. This tutorial includes detailed instructions for library installation, complete code explanations, and wiring diagrams for each project, ensuring a comprehensive understanding of the setup and functionality.