Button LED with Arduino Uno

Here is very Basic Project with for my DAE Electronics 3rd year students just for Arduino learning purpose. Its also helpful article for those who are new with Arduino.

In this Practical following components are used.

1. Arduino Uno

2. LED

3. Button

4. Resister 10K Ohm  

5. Connecting wires

but here is my circuit is for Proteus simulation (as shown in diaram).

    

Arduino Proramming Body have three parts.

Declaration area:

Int sw = 6;     // the number of the pushbutton pin

led =  12;      // the number of the LED pin

int swread = 0;         // variable for reading the pushbutton status

I/O Defining Area:

void setup() 

{      

  pinMode(led, OUTPUT);   // initialize the LED pin as an output:

  pinMode(sw, INPUT);    // initialize the pushbutton pin as an input:

  }

Main Program Body:

void loop() 

{

  swread = digitalRead(sw);     // read the state of the pushbutton value:

  if (swread == HIGH) {         // check if the pushbutton is pressed. If it is, the buttonState is HIGH:

   

  digitalWrite(led, HIGH);      // turn LED on:

  }

 else {

    digitalWrite(led, LOW);  }       // turn LED off:

So as whole is here:

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