How to Use a 16x2 LCD (I2C) with Arduino Mega | Beginner Tutorial with Simple Code

Описание: Learn how to use a 16x2 LCD with I2C and blink an LED using Arduino Mega 2560! This beginner-friendly tutorial will show you how to wire the LCD, fix common issues, and code it step-by-step. Perfect for students, makers, and STEM educators!

🔧 What You’ll Learn:

How to connect LCD with I2C to Arduino Mega

Why SDA/SCL pins matter (Pin 20 & 21 on Mega)

How to blink an LED and show its status on the LCD

Troubleshooting tips for blank LCD screens

Using LiquidCrystal_I2C and correct I2C addresses

📦 Parts Needed:
Arduino Mega 2560
16x2 LCD with I2C module
LED
220-ohm resistor
Jumper wires
Breadboard

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