AUTOMATIC LIGHT SYSTEM
Arduino output
01
DESCRIPTION & MATERIALS
This system is used to automatically turn the lights on when motion is sensed. The bulbs only go on at night time and do not react and turn on during the day. Material used are:
-Arduino Uno
-Bread board
-220ohms Resistor
-Photoresistor
-PIR sensor
-Relay SPDT
-Power supply
-Light bulb
02
CODES
int LightSensorVal = 0; //Input SEnsor
int PIRSensorVal = 0; //Input S
int RelayOutputVal = 0; //Output Relay
void setup()
{
pinMode(A0, INPUT); // Read the LDR sensor Value digital Input
pinMode(2, INPUT); // Read the PIR motion sensor value digital Input
pinMode(8, OUTPUT); // Write the Relay output value, digital output
Serial.begin(9600);
}
void loop()
{
LightSensorVal = analogRead(A0);
PIRSensorVal = digitalRead(2);
RelayOutputVal = 8;
if (LightSensorVal < 600) {
if (PIRSensorVal == HIGH) {
digitalWrite(8, HIGH);
delay(5000); // Wait for 5000 millisecond(s)
} else {
digitalWrite(8, LOW);
delay(1000); // Wait for 1000 millisecond(s)
}
} else {
digitalWrite(8, LOW);
Serial.println(LightSensorVal);
delay(300); // Wait for 300 millisecond(s)
}
}
03
OUTPUT
04
ANALYSIS
The system run smoothly and without fault.