20 free Raspberry Pi lessons

From flashing an SD card and headless setup through Linux basics, GPIO, I2C, SPI, the camera module, and Flask web control — ending with a full motion-activated light project. Builds on the main course, Circuit Building, and Arduino Uno sections, but you can start here directly if you already know the basics.

• 01What Is a Raspberry Pi? (Getting Started)
• 02Choosing a Raspberry Pi Model and Accessories (Getting Started)
• 03Flashing an SD Card with Raspberry Pi Imager (Getting Started)
• 04First Boot: Headless Setup with SSH & Wi-Fi (Getting Started)
• 05Getting Around the Desktop and Terminal (Linux Basics)
• 06Essential Linux Commands for Raspberry Pi (Linux Basics)
• 07Updating and Installing Software with apt (Linux Basics)
• 08Understanding the GPIO Pinout (GPIO Basics)
• 09Your First GPIO Script: Blinking an LED (GPIO Basics)
• 10Reading a Push Button with GPIO Input (GPIO Basics)
• 11PWM Output: Fading an LED with Python (GPIO Basics)
• 12Reading Analog Sensors with an MCP3008 ADC (Sensors)
• 13I2C on the Raspberry Pi: Talking to a Sensor (Communication)
• 14SPI on the Raspberry Pi: Talking to a Device (Communication)
• 15Using the Raspberry Pi Camera Module (Camera)
• 16Python Virtual Environments and pip (Python Setup)
• 17Driving a Relay from the Raspberry Pi (Outputs)
• 18Running a Script Automatically at Boot (Automation)
• 19Controlling GPIO from a Web Page with Flask (Web Control)
• 20Your First Project: A Motion-Activated Light (Project)