fade led by using Arduino Program

Fade Led simple program
 

Apparatus required:

1X Arduino board

1X Led

1X DC supply

Construction:

Step 1:  Upload the program given below in to Arduino board 

Step 2:  Connect the Arduino and Led in to the pins 

Step 3: Now connect Arduino into power supply 

Step 4:  Now your led fade is done

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Program:                                                                                                                                                   

       

int led = 9; // the pin that the LED is attached to

int brightness = 0; // how bright the LED is

int fadeAmount = 5; // how many points to fade the LED by




// the setup routine runs once when you press reset:

void setup() {

// declare pin 9 to be an output:

pinMode(led, OUTPUT);

}




// the loop routine runs over and over again forever:

void loop() {

// set the brightness of pin 9:

analogWrite(led, brightness);




// change the brightness for next time through the loop:

brightness = brightness + fadeAmount;




// reverse the direction of the fading at the ends of the fade:

if (brightness == 0 || brightness == 255) {

fadeAmount = -fadeAmount ;

}

// wait for 30 milliseconds to see the dimming effect

delay(30);

}

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