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    Arduino programs (called sketches) are written in C/C++ using the Arduino IDE. Every sketch has two main functions:

    • setup() – runs once at the start to initialize settings.

    • loop() – runs repeatedly after setup() finishes.

    A very common beginner example is the LED Blink program, which demonstrates digital output control.

    Example: Blink an LED connected to Pin 13

    // The setup function runs once when you press reset or power the board
    void setup() {
    pinMode(13, OUTPUT); // Set digital pin 13 as OUTPUT
    }

    // The loop function runs over and over again forever
    void loop() {
    digitalWrite(13, HIGH); // Turn the LED on
    delay(1000); // Wait for 1 second (1000 ms)
    digitalWrite(13, LOW); // Turn the LED off
    delay(1000); // Wait for 1 second
    }
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    How it works:

    1. pinMode(13, OUTPUT) – Configures pin 13 to send signals (control the LED).

    2. digitalWrite(13, HIGH) – Sends a HIGH signal (5V) to turn the LED on.

    3. delay(1000) – Pauses the program for 1000 milliseconds (1 second).

    4. digitalWrite(13, LOW) – Sends a LOW signal (0V) to turn the LED off.

    5. The loop() repeats indefinitely, creating a blinking effect.

    What is the basic operation of an Arduino?
    The basic operation of an Arduino. Circuits consist of at least one active electronic component, and a conductive material, such as wires, so that current can pass through. When working with an Arduino, you will in most cases build a circuit for your project. A simple example of a circuit, is an LED circuit.
    docs.arduino.cc
    Microcontrollers Lab
    https://microcontrollerslab.com/arduino-tutorials-beginners-programs-…
    150+ Arduino Tutorials and Projects for Beginners
  1. Arduino Docs
    https://docs.arduino.cc › built-in-examples

    Built-in Examples | Arduino Documentation

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

    • For example you might want to blink an LED while reading a button press. In this case, …

    • This example demonstrates the use of the analogWrite () function in fading an LED …

    • Home / Programming / Built-in Examples / Analog In, Out Serial Analog In, Out Serial …

    • This example contains the bare minimum of code you need for a sketch to compile …

    • This example turns on the built-in LED on pin 13 when you press the button. …

    See results only from docs.arduino.cc
  2. Microcontrollers Lab
    https://microcontrollerslab.com › arduino-tutorials...

    150+ Arduino Tutorials and Projects for Beginners

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      See full list on microcontrollerslab.com
  3. GeeksForGeeks
    https://www.geeksforgeeks.org › electronics...

    Arduino Coding Basics - GeeksforGeeks

    Jul 23, 2025 · We have seen how Arduino can be used for programming electronic devices using IDEs and programming languages. We have also learned some …

  4. Starting Electronics
    https://startingelectronics.com › arduino-programming

    Arduino Programming Made Easy: Arduino Coding Step …

    Oct 18, 2025 · In this guide, you’ll learn what Arduino programming is, how the Arduino programming language works, and how to write your first program …

  5. readthedocs.io
    https://the-arduino-guide.readthedocs.io › en › latest › ...

    Program Examples - The Foundations Resource Hub

    A collection of program examples has been created to help you learn how to use the Arduino board and the components in your project kit. Each example walks through how to control a specific component …

  6. Circuit Basics
    https://www.circuitbasics.com › home › arduino › basic...

    Basic Arduino Programming Tutorials - Circuit Basics

    Learn the basics of Arduino programming with easy to follow tutorials on variables, loops, functions, conditional statements, and more!.

  7. Arduino Getting Started
    https://arduinogetstarted.com › arduino-tutorials

    Arduino Tutorials

    You will learn: how sensors/actuators work, how to connect sensors/actuators to Arduino, how to program Arduino step by step. The detail instruction, video tutorial, line-by-line code explanation are …

  8. arduinoexpert.com
    https://arduinoexpert.com › blog › arduino-programming...

    Arduino Programming Language – A Complete …

    Aug 14, 2025 · A beginner-friendly guide to the Arduino programming language. Learn how to code, use libraries, and develop creative electronics projects.

  9. Arduino Docs
    https://docs.arduino.cc › learn › starting-guide › ...

    Getting Started with Arduino

    Sep 26, 2025 · To explore the whole Arduino API, please refer to the Arduino Language Reference, an in-depth wiki maintained by Arduino and its community. …

  10. Instructables
    https://www.instructables.com

    12 Arduino Projects for Beginners — With Code

    12 Arduino Projects for Beginners — With Code: Have you ever wanted to learn how to write code for the Arduino board by working on fun Arduino projects, but never …

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