// Automatic Study Lamp using LDR
// Daylight Auto OFF feature added

int ldrPin = A0;     
int ledPin = 11;      

int dayLightThreshold = 950;  // Full daylight limit

void setup() {
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int ldrValue = analogRead(ldrPin);
  int brightness;

  // Step 1: Check for full daylight
  if (ldrValue > dayLightThreshold) {
    brightness = 0;   // LED completely OFF
  } 
  else {
    // Step 2: Normal brightness control
    brightness = map(ldrValue, 0, 1023, 255, 0);
    brightness = constrain(brightness, 0, 255);
  }

  analogWrite(ledPin, brightness);

  // Debug info
  Serial.print("LDR: ");
  Serial.print(ldrValue);
  Serial.print(" | LED Brightness: ");
  Serial.println(brightness);

  delay(1000);
}