Automatic Night Lamp

1// https://www.youtube.com/channel/UCaXI2PcsTlH5g0et67kdD6g  //
2//  Automatic NightLamp //
3// By MOHD SOHAIL //
4
5const int relayPin = 13;  
6const  int ldrPin = A0;  
7
8
9void setup() {
10
11  Serial.begin(9600);
12  pinMode(relayPin,  OUTPUT); 
13  pinMode(ldrPin, INPUT);   
14}
15
16void loop() {
17
18  int  ldrStatus = analogRead(ldrPin);  
19  
20
21   if (ldrStatus <=400) {
22
23    digitalWrite(relayPin, LOW);               
24    Serial.println("LDR is DARK,  LED is ON");
25    
26   }
27  else {
28
29    digitalWrite(relayPin, HIGH);         
30    Serial.println("---------------");
31  }
32}
33