Built-in Examples

Learn the basics of Arduino through this collection tutorials. All code examples are available directly in all IDEs.

Basics

Analog Read Serial
Bare Minimum code needed
Blink
Digital Read Serial
Fading a LED
Read Analog Voltage

Digital

Blink Without Delay
How to Wire and Program a Button
Debounce on a Pushbutton
InputPullupSerial
State Change Detection (Edge Detection) for pushbuttons
Simple keyboard using the tone() function
Play a Melody using the tone() function
Tone on Multiple Speakers
Pitch follower using the tone() function

Analog

Analog In, Out Serial
Analog Input
Analog Write with 12 LEDs on an Arduino Mega
Calibrate Sensor Input
Fading
Smoothing Readings From an Analog Input

Communication

ASCII Table
Create a LED Dimmer
Create a Graph with Processing
MIDI Note Player
Use Multiple Serial Ports on the Arduino Mega
Physical Pixel
Read ASCII String
Serial Call and Response (handshaking)
Serial Call and Response (handshaking) with ASCII-encoded output
SerialEvent
SerialPassthrough
Virtual Color Mixer

Control Structures

How to Use Arrays
For Loop Iteration (aka The Knight Rider)
Switch (case) Statement, used with sensor input
Switch (case) Statement, used with serial input
While Loop
If Statement (Conditional Statement)

Sensors

ADXL3xx Accelerometer
Detect a Knock
Memsic 2125 Accelerometer
Ping Ultrasonic Range Finder

Display

LED Bar Graph
Control an 8x8 matrix of LEDs.

Strings

Character Analysis
String Addition Operator
String Appending Operators
String Case Change Functions
String Character Functions
String Comparison Operators
String Object Constructors
String indexOf() and lastIndexOf() Method
How to Use String length()
String length() and trim() Commands
String replace Function
String startsWith and endsWith Functions
String substring Function
String to Int Function

USB

Button Mouse Control
Joystick Mouse Control
Keyboard and Mouse Control
Keyboard Logout
Keyboard Message
Keyboard Reprogram
Keyboard Serial

Arduino ISP

Arduino as ISP and Arduino Bootloaders
From Arduino to a Microcontroller on a Breadboard

Connect and Contribute

Project Hub RepositoryForum
Product ComplianceHelp CenterTrademarks & Licensing