/*******************************************************************************
*
*    Projeto 28 – Iluminação de LED automatizada com sensor de luminosidade LDR
*                   http://squids.com.br/arduino
*
*******************************************************************************/
 
const int LDR = 0;
const int led = 3;
int ValorLido = 0;
int pwm = 0;


void setup() {
Serial.begin(9600);

pinMode(led, OUTPUT);
}

void loop() {
ValorLido = analogRead(LDR);
Serial.print("Valor lido pelo LDR = ");
Serial.println(ValorLido);
delay(500);

if (ValorLido < 80){
analogWrite(led, pwm);
pwm++;
delay(100);
}
else{
digitalWrite(led, LOW);
pwm = 0;
}

if(pwm > 255){
pwm=255;
}
}