Arduino Hello World Blink Code

This is a basic example how arduino works. In this arduino projects you’ll see how arduino control LED on for 1 second and off for 1 second repeatedly.

Arduino Hello World Blink

Instruction;
1) Connect cathode lead of LED (shorter lead) to ground pin and anode lead of LED (longer lead) to pin 13.

Upload this code to your arduino

/*
Blink
Turns on an LED on for one second, then off for one second, repeatedly.This example 
code is in the public domain.

Code hosted at: arduinoprojects101.com
*/

void setup() {
// initialize the digital pin as an output.
// Pin 13 has an LED connected on most Arduino boards:
pinMode(13, OUTPUT);
}

void loop() {
digitalWrite(13, HIGH);   // set the LED on
delay(1000);              // wait for a second
digitalWrite(13, LOW);    // set the LED off
delay(1000);              // wait for a second
}

There is 2 section of code arduino running, first setup() function which run once and second loop() function running continuously.

Arduino Hello World Blink Schematic

In setup function pinMode 13 declare as OUTPUT.

[box color=”#985D00″ bg=”#FFF8CB” font=”verdana” fontsize=”14 ” radius=”20 ” border=”#985D12″ float=”right” head=”Major Components in Project” headbg=”#FFEB70″ headcolor=”#985D00″]Parts List;
1) 1x 5mm red LED
2) 1x Arduino[/box]

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