Introduction

In this article, I will explain how to blink an LED in Arduino Mega 2560.
Parts Of List:
LED:
Figure 1: LED
Connection: Take three LEDs and fix them in the Bread Board.
First LED connection:
Second LED connection:
  • Positive pin = 12;
  • Negative pin = Gnd.
Third LED connection:
  • Positive pin = 11;
  • Negative pin = Gnd.
Programming:
  1. int led1 = 13;
  2. int led2 = 12;
  3. int led3 = 11;
  4. void setup()
  5. {
  6. pinMode(13, OUTPUT);
  7. pinMode(12, OUTPUT);
  8. pinMode(11, OUTPUT);
  9. }
  10. void loop()
  11. {
  12. digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level)
  13. delay(1000); // wait for a second
  14. digitalWrite(13, LOW); // turn the LED off by making the voltage LOW
  15. delay(1000); // wait for a second
  16. digitalWrite(12, HIGH); // turn the LED on (HIGH is the voltage level)
  17. delay(1000); // wait for a second
  18. digitalWrite(12, LOW); // turn the LED off by making the voltage LOW
  19. delay(1000); // wait for a second
  20. digitalWrite(11, HIGH); // turn the LED on (HIGH is the voltage level)
  21. delay(1000); // wait for a second
  22. digitalWrite(11, LOW); // turn the LED off by making the voltage LOW
  23. delay(1000); // wait for a second
  24. }
Explanation:
  • When the first LED is ON then automatically take the delay time.
  • And the second LED is ON and finally the third LED is also ON.
  • It can be repeatedly done.
Output
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