Arduino Street light with AC lights

Designing a system based on Arduino to control the street lights, turning on during the night and off during daylight.

Introduction- 

We are going to design an automatic street light system that turns on during night/dark and turns off during daylight. It uses an LDR to control the switch state.

An LDR is a light-dependent resistor whose resistance changes according to the light falling upon it.

The resistance increases with darkness and decreases with light.

An LDR.

Components Required -   

1. Arduino Board 

2. Relay Module(5V).

3. LDR.

4. 4.7K ohm resistor 

5. AC Bulb.

Connections - 

1. Connect the pin 5 of Arduino to Relay and GND to relay GND. 

2. Connect 4.7K ohms resistor in series with LDR between 5V and GND.

3. Join A0 of Arduino to the middle node between LDR and resistor ( as shown in the schematic).

Circuit schematic- 

In the above circuit, connect A0 pin to the node between LDR and resistor as shown below.

Arduino Code- 

int ledpin=5;
int data;

void setup() {
 pinMode(5,OUTPUT);
 pinMode(A0,INPUT);
 Serial.begin(9600); 
}

void loop() {
  Serial.println("LED State-");
  data = analogRead(A0);
  if(data<200){
    digitalWrite(5,LOW);
    Serial.println("ON");
  }
  else{
    digitalWrite(5,HIGH);
    Serial.println("OFF");
  }
}