اردوينو: البيت الذكي : تمرين 6: اصدار اوامر تخكم تبعا لشدة الاضاءة داخل البيت او خارجه Project 6 - Light Theremin

استخدام المقاومة الضوئية لاصدار صوت من البزر

المواد اللازمة:

10k ohm resistor

Photoresistor

Piezo Buzzer

الكود

// variable to hold sensor value

int sensorValue;

// variable to calibrate low value

int sensorLow = 1023;

// variable to calibrate high value

int sensorHigh = 0;

// LED pin

const int ledPin = 13;

void setup() {

  // Make the LED pin an output and turn it on

  pinMode(ledPin, OUTPUT);

  digitalWrite(ledPin, HIGH);

  // calibrate for the first five seconds after program runs

  while (millis() < 5000) {

    // record the maximum sensor value

    sensorValue = analogRead(A0);

    if (sensorValue > sensorHigh) {

      sensorHigh = sensorValue;

    }

    // record the minimum sensor value

    if (sensorValue < sensorLow) {

      sensorLow = sensorValue;

    }

  }

  // turn the LED off, signaling the end of the calibration period

  digitalWrite(ledPin, LOW);

}

void loop() {

  //read the input from A0 and store it in a variable

  sensorValue = analogRead(A0);

  // map the sensor values to a wide range of pitches

  int pitch = map(sensorValue, sensorLow, sensorHigh, 50, 4000);

  // play the tone for 20 ms on pin 8

  tone(8, pitch, 20);

  // wait for a moment

  delay(10);

}