Introduction: How to Blink LED Using Arduino
Blink LED using arduino UNO microcontroller or make LED turn off and on continuously.
Use-
Basic knowledge of microcontroller(I/O)
Step 1: Requirement
Requirement(Hardware)-
x1 -LED
x1 –Breadboard
x1 –Arduino UNO
x1 –Resistor (220ohm)
x4 –Jumper cables(M-M)
x1 –Computer or laptop
Requirement(Software)-
Arduino IDE software
https://www.arduino.cc/en/Main/Software
Step 2:
Take a Led and determine positive and negative leg.
Long leg = Positive
Short leg= Negative
Step 3:
Take a breadboard and determine flow of current in breadboard
First and last two lines = current flow row wise
Middle lines = current flow in column wise
Step 4:
Make a circuit like shown in schematic or you can directly mount on arduino.
Arduino’s pin 13 connected to positive leg of LED through resister
Arduino’s GND connected to negative leg of LED.
Step 5:
Write code and upload it on arduino.
To upload code into arduino, need to attach arduino with pc using USB cable which is come with arduino board.
Now, In arduino IDE goto FILE>Examples>Basic>Blink or copy this code and press upload in toolbar.
Code-
// the setup function runs once when you press reset or power the board
void setup()
{
// initialize digital pin 13 as an output.
pinMode(13, OUTPUT);
}
// the loop function runs over and over again forever
void loop()
{
digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(13, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
3 Comments
2 years ago
Write a program to blink default LED on the Arduino board with a delay of 2sec,
5 years ago
Great intro to Arduino tutorial. It is very well written and easy to follow.
Reply 5 years ago
This was my first tutorial and Thanks for your feedback :)