Cảm biến quang trở với Ardunio
File code:
const int sensorPin = A0; // Assigns the pin A0 to the constant for the photoresistor
const int buzzerPin = 9; // Assigns the pin 9 to the constant for the buzzer
const int threshold = 500; // Set the threshold value
int led = 8;
int sensorValue = 0; // To store the photoresistor reading
void setup() {
// put your setup code here, to run once:
pinMode(buzzerPin, OUTPUT); // Set the buzzer pin as an output
pinMode(led, OUTPUT);
Serial.begin(9600); // Initialize serial communication at 9600 baud rate
}
void loop() {
// put your main code here, to run repeatedly:
sensorValue = analogRead(sensorPin); // Read the analog value from the photoresistor
Serial.println(sensorValue); // Print the photoresistor reading to the serial monitor
delay(100); // Wait 0.1 seconds
// Check if the reading is below the threshold
if (sensorValue > threshold) {
digitalWrite(buzzerPin, HIGH); // If below threshold, turn on the buzzer
digitalWrite(led, HIGH);
} else {
digitalWrite(buzzerPin, LOW); // If not below threshold, turn off the buzzer
digitalWrite(led, LOW);
}
}
