Browsing articles tagged with " analogWrite"
Mar 1, 2011
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Fading LEDs and Tones

/*

Liza Stark

March 1, 2011

PWM Siren and Fading LEDs

*/

//Set and initialize variables for LED pins
int green = 10;
int red = 5;
int white = 6;

// Set and initialize variable for speaker
int speaker = 9;

//Set variable for fadeValue
int fadeValue;

void setup() {
// nothing happens in setup
}

void loop() {

// fade green up
for(fadeValue = 0 ; fadeValue <= 255; fadeValue +=1) { // sets the value (range from 0 to 255): analogWrite(green, fadeValue); tone(speaker, 300 + fadeValue); delay(30); } // fade green down for(fadeValue = 255 ; fadeValue >= 0; fadeValue -=1) {
analogWrite(green, fadeValue);
Serial.println(fadeValue);
tone(speaker, fadeValue – 300);
delay(30); // delay to see fade
}

// fade red up
for(fadeValue = 0 ; fadeValue <= 255; fadeValue +=3) { // sets the value (range from 0 to 255): analogWrite(red, fadeValue); Serial.println(fadeValue); tone(speaker, 200 + fadeValue); delay(30); } // fade red down for(fadeValue = 255 ; fadeValue >= 0; fadeValue -=3) {
// sets the value (range from 0 to 255):
analogWrite(red, fadeValue);
Serial.println(fadeValue);
tone(speaker, fadeValue – 200);
// wait for 30 milliseconds to see the dimming effect
delay(30);
}

//fade white up
for(fadeValue = 0 ; fadeValue <= 255; fadeValue +=5) { // sets the value (range from 0 to 255): analogWrite(white, fadeValue); Serial.println(fadeValue); tone(speaker, 100 + fadeValue); delay(30); } // fade white down for(fadeValue = 255 ; fadeValue >= 0; fadeValue -=5) {
// sets the value (range from 0 to 255):
analogWrite(white, fadeValue);
Serial.println(fadeValue);
tone(speaker, fadeValue – 100);
// wait for 30 milliseconds to see the dimming effect
delay(30);

}

}