First DAT206 session of the year and we're already getting stuck into Arduino. Today we made a basic "sound machine" using a light sensor and a buzzer. We read the light sensor value and told the buzzer to go off if the value dropped below 200 (ranges from 0 to 800ish).

int sensor = A0;
int sensorValue = 0;

int buzzer = 3;
int buzzerValue = 35;


void setup() {
  pinMode(sensor, INPUT);
  pinMode(buzzer, OUTPUT);

  Serial.begin(14400);
}

void loop() {
  sensorValue = analogRead(sensor);
  Serial.println(sensorValue);

  if(sensorValue < 200) {
    analogWrite(buzzer, buzzerValue);
  } else {
    analogWrite(buzzer, 0);
  }

  delay(200);
}