Question

Edit the following Arduino Mega code so that the LED fades in and out on an infinite loop. The brightness level should be between 0 and 255. Use pin 9 for the LED.

int led = 9;

void setup() {

pinMode(led, OUTPUT) ;

}

void loop() {

analongWrite(led,brightness);

}

Answer 1

Answer

please upvote if its upto your expectation . please upvote

program plan :

1. set output pin

2. we can change brightness using pwm on pin

3. just use analog write function to set pwm

4. bright variable 0 to its 255 and again zero

int led=9; //led pin for output
int bright=0; //pwm value for brightness 0 to 255
void setup() {
pinMode(led, OUTPUT); //set the output pin
}

// the loop routine runs over and over again forever:
void loop() {
analogWrite(led, bright); //write pwm value
bright+=5; //its led brightness fade value to see changes in led brightness

if(bright>=255)

bright=0; //led brightness from 0 to 255
delay(30); //delay for pwm to see changes
}