Arduino - Blink

Arduino Blink Example is one the most basic example in Arduino Library. This is basically used for testing a particular Arduino whether it is working correctly or not. It is most basic and very first example which is taught in Arduino tutorials.

In this example, a LED which is embedded on the Arduino Board starts blinking in the interval of 1 second. This LED can be found near Digit Pin – 13. This LED is directly connected to Pin – 13, so we can directly access this LED via Pin – 13.

Now, let’s check the code of the Blink Example and see how it works.

This is the Blink Example Project which you can find in File->Examples->Basic->Blink.

This is the code which do all the magic in the Arduino Board.

This block (function) of code defines different pin functionality as INPUT or OUTPUT.

This LED_BUILTIN is nothing but the Pin – 13 built–in LED, which can be directly accessed by Pin-13 itself.

This HIGH is nothing but ON or 1 (one) in Binary language which means pass the current.

This LOW is nothing but OFF or 0 (zero) in Binary language which means don’t pass the current.

Here we are waiting for 1000 ms which is equivalent to 1 second.

Like this the LED is ON for 1 second.

And like this the LED is OFF for 1 second.

This block (function) of code create a loop and make this ON and OFF of LED continuous, which is visible us as LED BLINKING.

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