Light Blocking Sensor | Arduino

SOURCE CODE:

const int lightBlocking = A0; //define sensor to pin A0 const int led = 9;//define led to pin 9 int val;//create sensor value variable

void setup() { pinMode(lightBlocking,INPUT);//set the sensor to an input pinMode(led, OUTPUT);//set led as output Serial.begin(9600);//begin the serial monitor

} void loop() {

int val = analogRead(lightBlocking);//read the sensor

if (val < 400){ digitalWrite(led, HIGH);//turn led on } if(val > 600){ digitalWrite(led, HIGH);//turn led on } else{ digitalWrite(led, LOW);//turn led off } Serial.println(val);//print the sensor value to the serial monitor delay(200);//wait 200 milliseconds }