Smart dustbin.ino

// www.edisonsciencecorner.blogspot.com


//define Pin
 
#include <Servo.h>
 
 
Servo servo;
 
 
int trigPin = A4;
 
int echoPin = A1;
 
 
// defines variables
 
long duration;
 
int distance;
 
 
void setup() 
 
{
 
  servo.attach(9);
 
  servo.write(0);
 
 delay(2000);
 
  
 
// Sets the trigPin as an Output
 
pinMode(trigPin, OUTPUT);
 
// Sets the echoPin as an Input 
 
pinMode(echoPin, INPUT);
 
// Starts the serial communication 
 
Serial.begin(9600); 
 
}
 
void loop() 
 
{
 
// Clears the trigPin
 
digitalWrite(trigPin, LOW);
 
delayMicroseconds(2);
 
// Sets the trigPin on HIGH state for 10 micro seconds
 
digitalWrite(trigPin, HIGH);
 
delayMicroseconds(10);
 
digitalWrite(trigPin, LOW);
 
// Reads the echoPin, returns the sound wave travel time in microseconds
 
duration = pulseIn(echoPin, HIGH);
 
// Calculating the distance
 
distance= duration*0.034/2;
 
// Prints the distance on the Serial Monitor
 
Serial.print("Distance: ");
 
Serial.println(distance);
 
if ( distance <= 30) // Change Distance according to Ultrasonic Sensor Placement
 
 {
 
 
servo.write(0);
 
delay(3000);
 
 } 
 
else 
 
{
 
servo.write(90);
 
 
 }
 
 
}