Built-In Examples

Built-in Examples are sketches included in the Arduino Software (IDE), to open them click on the toolbar menu: File > Examples. These simple programs demonstrate all basic Arduino commands. They span from a Sketch Bare Minimum to Digital and Analog IO, to the use of Sensors and Displays.

Download the latest Arduino Software, certain fuctions may not work in earlier versions.

1. Basics

  • Analog Read Serial: Read a potentiometer, print its state out to the Arduino Serial Monitor.
  • Bare Minimum: The bare minimum of code needed to start an Arduino sketch.
  • Blink: Turn an LED on and off.
  • Digital Read Serial: Read a switch, print the state out to the Arduino Serial Monitor.
  • Fade: Demonstrates the use of analog output to fade an LED.
  • Read Analog Voltage: Reads an analog input and prints the voltage to the Serial Monitor.

2. Digital

3. Analog

  • Analog In Out Serial: Read an analog input pin, map the result, and then use that data to dim or brighten an LED.
  • Analog Input: Use a potentiometer to control the blinking of an LED.
  • Analog Write Mega: Fade 12 LEDs on and off, one by one, using an Arduino Mega board.
  • Calibration: Define a maximum and minimum for expected analog sensor values.
  • Fading: Use an analog output (PWM pin) to fade an LED.
  • Smoothing: Smooth multiple readings of an analog input.

4. Communication

These examples include code that allows the Arduino to talk to Processing sketches running on the computer. For more information or to download Processing, see processing.org. There are also Max/MSP patches that can communicate with each Arduino sketch as well. For more on Max/MSP see Cycling 74.

  • ASCIITable: Demonstrates Arduino's advanced serial output functions.
  • Dimmer: Move the mouse to change the brightness of an LED.
  • Graph: Send data to the computer and graph it in Processing.
  • Midi: Send MIDI note messages serially.
  • Multi Serial Mega: Use two of the serial ports available on the Arduino Mega.
  • Physical Pixel: Turn a LED on and off by sending data to your Arduino from Processing or Max/MSP.
  • Read ASCII String: Parse a comma-separated string of integers to fade an LED.
  • Serial Call Response: Send multiple variables using a call-and-response (handshaking) method.
  • Serial Call Response ASCII: Send multiple variables using a call-and-response (handshaking) method, and ASCII-encode the values before sending.
  • Serial Event: Demonstrates the use of serialEvent().
  • Serial Passthrough: Demonstrates how to virtually connect Serial and Serial1.
  • Virtual Color Mixer: Send multiple variables from Arduino to your computer and read them in Processing or Max/MSP.

5. Control Structures

  • Arrays: A variation on the For Loop example that demonstrates how to use an array.
  • For Loop Iteration: Control multiple LEDs with a for loop and.
  • If Statement Conditional: Use an if statement' to change the output conditions based on changing the input conditions.
  • Switch Case: How to choose between a discrete number of values.
  • Switch Case 2: A second switch-case example, showing how to take different actions based on the characters received in the serial port.
  • While Statement Conditional: How to use a while loop to calibrate a sensor while a button is being read.

6. Sensors

  • ADXL3xx: Read an ADXL3xx accelerometer.
  • Knock: Detect knocks with a piezo element.
  • Memsic2125: Two-axis accelerometer.
  • Ping: Detect objects with an ultrasonic range finder.

7. Display

8. Strings

9. USB

The Keyboard and Mouse examples are unique to the Leonardo, Micro and Due. They demonstrate the use of libraries that are unique to the board.



10. Starterkit & BasicKit

Tutorials for the Examples of the StarterKit are available in the Project Book included in the kit, if you purchase a BasicKit you will be able to access the projects online on Project Ignite.

11. Arduino ISP

Arduino ISP turns your Arduino into an in-circuit programmer to re-program AtMega chips. Useful when you need to re-load the bootloader on an Arduino, if you're going from Arduino to an AtMega on a breadboard , or if you're making your own Arduino-compatible circuit on a breadboard.