Components

In this book, we will use various external components together with the Pico to build examples and experiments. These components are used to interact with the outside world, such as reading inputs, controlling outputs, and displaying information.

Some components are simple parts like LEDs, buttons, resistors, LDRs, and thermistors. Others are assembled units such as displays, sensors, and interface devices that connect to the Pico using a small number of pins.

Important

Some components may require soldering, for example attaching header pins to boards such as displays or sensor modules. Many parts are also available in pre-soldered form.

If a component does not have pins attached, you will need to solder them before use. Soldering is a practical skill in embedded work, so take your time and follow basic safety precautions.

This section only provides an overview of the components that appear throughout the book. Detailed explanations, wiring, and code examples are covered later in their respective chapters. You do not need to collect all components in advance. You can add them gradually as you progress through the book.

Components Used in This Book

Component names are provided for reference. Before purchasing, check the corresponding chapter to ensure the module type and pin layout match the examples used in this book.

• Breadboard
• Jumper wires (male-male, male-female)
• LED
• Resistors (common values: 330 ohm, 1k ohm, 2.2k ohm, 10k ohm)
• Push button (tactile switch)
• LDR (Light Dependent Resistor)
• NTC Thermistor (10k)
• OLED display (SSD1306, 128x64, I2C)
• LCD display (16x2, HD44780 compatible)
• Ultrasonic sensor (HC-SR04 / HC-SR04+)
• Buzzer (active and passive)
• Servo motor (SG90)
• MAX7219 8X8 Dot LED Matrix Display Module
• RFID module (RC522)
• Micro SD Card Reader Module (SPI)
• Joystick module (PS2 type)