Automatic Night Light Project Using Arduino Microcontroller

1//LDR sensor-based Automatic Night Light Project
2
3//LDR MODULE Connections
4//connect 5V from Arduino to one leg of LDR.
5//Connect another leg of LDR to a 10K resistor and further connect it to the analog pin A0 of Arduino.
6// Connect another end of the 10k resistor to the GND of Arduino and the circuit is Done.
7
8// updated code to fetch the data with time on serial monitor (dated 3 AUG 2022)
9
10void setup() {
11  Serial.begin(9600);
12  pinMode(13,OUTPUT);
13  pinMode(12,OUTPUT);
14}
15void loop() {
16  {
17  float sensorValue = analogRead(A0);
18  // Reads the analog input ranging from 0 to 1023
19  //Serial.println(sensorValue);
20  if(sensorValue<= 600) // 600 is ideal, more the value, LED will keep glowing in brighter exposure.
21  {
22    digitalWrite(13,HIGH);
23    digitalWrite(12,HIGH);
24    Serial.println("LED ON");
25    delay(2000);//two-second delay of time between readings.
26    // add this delay to avoid fluctuating signals during the natural transitions from dark to light and vice-versa due to sunlight.
27  }
28  else
29  digitalWrite(13,LOW);
30  digitalWrite(12,LOW);
31  Serial.println("LED OFF"); //Serial Monitor Display is optional
32  delay(2000);//two-second delay of time between readings.
33  // a little delay here is advisable otherwise relay switch may damage non-LED AC bulbs with fluctuations during natural transitions from day to night due to sunlight.
34}
35delay(2000);// even more delay of 2 seconds is optional.
36}