LED pulse

Exemplo com o uso de entradas e saídas analógicas. Usando o Arduino para fazer um LED piscar de maneira suave de acordo com a leitura de um potenciômetro.

Código:

int sensorPin = A0;  // select the input pin for the potentiometer
int ledPin = 9;      // select the pin for the LED
int brightness = 0;  // how bright the LED is
int fadeAmount = 5;  // how many points to fade the LED by
int sensorValue = 0; // variable to store the value coming from the sensor

void setup() {
  // declare the ledPin as an OUTPUT:
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // read the value from the sensor:
  sensorValue = analogRead(sensorPin);
  // turn the ledPin on
  // set the brightness of pin 9:
  analogWrite(ledPin, 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 ;
  }

  delay(map(sensorValue, 0, 1023, 5, 100));
}

int sensorPin = A0; // select the input pin for the potentiometer

int ledPin = 9; // select the pin for the LED

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

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

int sensorValue = 0; // variable to store the value coming from the sensor

void setup() {

// declare the ledPin as an OUTPUT:

pinMode(ledPin, OUTPUT);

}

void loop() {

// read the value from the sensor:

sensorValue = analogRead(sensorPin);

// turn the ledPin on

// set the brightness of pin 9:

analogWrite(ledPin, 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 ;

}

delay(map(sensorValue, 0, 1023, 5, 100));

}