// 🌙 Automatic LED Light using LDR

const int LDR_PIN = A0;   // LDR connected to analog pin A0
const int LED_PIN = 9;    // LED connected to digital pin 9
int ldrValue = 0;         // Variable to store LDR reading
int threshold = 500;      // Light threshold (adjust based on your room lighting)

void setup() {
  pinMode(LED_PIN, OUTPUT);
  Serial.begin(9600);  // For debugging light values
}

void loop() {
  ldrValue = analogRead(LDR_PIN);  // Read LDR value
  Serial.println(ldrValue);        // Print value to Serial Monitor

  if (ldrValue < threshold) {
    digitalWrite(LED_PIN, HIGH);   // Turn ON LED in dark
  } else {
    digitalWrite(LED_PIN, LOW);    // Turn OFF LED in light
  }

  delay(500); // Small delay for stability
}