Automatic light

ldr sensor

laptop

Breadboard (generic)

5 mm LED: Red

Arduino Uno Rev3

Jumper wires (generic)

plastic

USB-A to Mini-USB Cable

Arduino IDE

<pre ><code >int sensorPin = A0; // select the input pin for ldr int sensorValue = 0; // variable to store the value coming from the sensor void setup() { pinMode(2, OUTPUT); pinMode(3,OUTPUT); pinMode(4,OUTPUT); pinMode(5,OUTPUT);//pin connected to the led Serial.begin(9600); //sets serial port for communication } void loop() { // read the value from the sensor: sensorValue = analogRead(sensorPin); Serial.println(sensorValue); //prints the values coming from the sensor on the screen if(sensorValue < 900) { digitalWrite(2,HIGH); digitalWrite(3,HIGH); digitalWrite(4,HIGH); digitalWrite(5,HIGH);//turn led ON } else { digitalWrite(2,LOW); digitalWrite(3,LOW); digitalWrite(4,LOW); digitalWrite(5,LOW);//turn led OFF } delay(100); } </code></pre>

a figure for automation

Automatic light

Just a future