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int ledPin = 53; // choose the pin for the LED
int inputPin = 22; // choose the input pin
int val = 0; // variable for reading the pin status
void setup() {
Serial.begin(9600);
pinMode(ledPin, OUTPUT); // declare LED as output
pinMode(inputPin, INPUT); // declare photo interrupter as input
}
void loop(){
val = digitalRead(inputPin); // read input value
Serial.print(val);
//delay(500);
if (val == LOW) { // check if the input is LOW
digitalWrite(ledPin, LOW); // turn LED OFF
} else {
digitalWrite(ledPin, HIGH); // turn LED ON
}
}
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