Embedded Prep

Introduction of LED Blinking

Arduino is an open-source electronics platform that makes it easy to build interactive projects. The LED blinking project is the classic “Hello World” of embedded systems and a great starting point for beginners.

Components Required

• Arduino Uno (or any other compatible board)
• LED (any color)
• 220-ohm resistor (optional but recommended)
• Breadboard (optional)
• Jumper wires
• USB cable for programming

Circuit Connection

An LED has two legs:

• Anode (+) (longer leg) → Connect to digital pin 13 on Arduino
• Cathode (-) (shorter leg) → Connect to GND (ground)
• If using a resistor, place it in series with the anode to limit current.

Arduino Code for LED Blinking

Upload the following code using the Arduino IDE:

// LED Blinking with Arduino

#define LED_PIN 13  // Define the LED pin

void setup() {
    pinMode(LED_PIN, OUTPUT); // Set pin as output
}

void loop() {
    digitalWrite(LED_PIN, HIGH); // Turn the LED ON
    delay(1000); // Wait for 1 second
    digitalWrite(LED_PIN, LOW); // Turn the LED OFF
    delay(1000); // Wait for 1 second
}

Code Explanation

• Define the LED pin → #define LED_PIN 13
• Setup function → pinMode(LED_PIN, OUTPUT); initializes pin 13 as an output.
• Loop function →
  • digitalWrite(LED_PIN, HIGH); turns the LED on.
  • delay(1000); keeps it on for 1 second.
  • digitalWrite(LED_PIN, LOW); turns the LED off.
  • Another delay(1000); keeps it off for 1 second.

Experimenting Further

• Modify the delay() values to change the blink rate.
• Use different pins and multiple LEDs.
• Add a button to turn the LED on/off manually.

Conclusion

This simple project helps you understand Arduino digital outputs and serves as a foundation for more advanced projects. Happy coding!

You can also Visit other tutorials of Embedded Prep 

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• Bit Manipulation Interview Questions
• Structure and Union in c
• Little Endian vs. Big Endian: A Complete Guide
• Merge sort algorithm

Special thanks to @embedded-prep for contributing to this article on Embedded Prep

Raj Kumar

Mr. Raj Kumar is a highly experienced Technical Content Engineer with 7 years of dedicated expertise in the intricate field of embedded systems. At Embedded Prep, Raj is at the forefront of creating and curating high-quality technical content designed to educate and empower aspiring and seasoned professionals in the embedded domain.

Throughout his career, Raj has honed a unique skill set that bridges the gap between deep technical understanding and effective communication. His work encompasses a wide range of educational materials, including in-depth tutorials, practical guides, course modules, and insightful articles focused on embedded hardware and software solutions. He possesses a strong grasp of embedded architectures, microcontrollers, real-time operating systems (RTOS), firmware development, and various communication protocols relevant to the embedded industry.

Raj is adept at collaborating closely with subject matter experts, engineers, and instructional designers to ensure the accuracy, completeness, and pedagogical effectiveness of the content. His meticulous attention to detail and commitment to clarity are instrumental in transforming complex embedded concepts into easily digestible and engaging learning experiences. At Embedded Prep, he plays a crucial role in building a robust knowledge base that helps learners master the complexities of embedded technologies.

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