This tutorial demonstrate the basics of Arduino with using two led lights which blink sequentially.

You will require the following parts :—

1) Arduino Uno ( You can use any version of Arduino )

2) 2 Led’s

3)Breadboard

4) Breadboard Wires

5) Wire Stripper

The Led operate at 3V DC. The led’s can be easily drawn by Arduino board. It has to be remembered that the shorter leg of an led is – negative & longer led is + positive.

Fix the Led as shown in image.

1) Connect the ground of Led’s to GND Pin of Arduino.

2) Connect +ve of one Led to 12th Pin of Arduino.

3) Connect -ve of second Led to 11th Pin of Arduino

4) Connect the USB Cable from computer to Arduino

Below is the code for running disco lights using Two Led’s. Upload the code to Arduino :—

/*
Disco Lights Turns on 1st LED on for one second, then 2nd Led for one second, repeatedly.

*/

void setup() {

// initialize the digital pin as an output.

// Pin 12 & 11 have LED’s+ connected.

pinMode(12, OUTPUT);

pinMode(11, OUTPUT);

}

void loop() {

digitalWrite(12, HIGH); // set the LED on 12th Pin on

digitalWrite(11, LOW); // set the LED on 11th Pin off

delay(1000); // wait for a second

digitalWrite(12, LOW ); // set the LED on 12th Pin off

digitalWrite(11, HIGH); // set the LED on 11th Pin on

delay(1000); // wait for a second

}

Hurray !!!! The Disco lights have been started.