Smart Dustbin using arduino

Code:-

#include <Servo.h>   //servo library

Servo servo;     

int trigPin = 5;    

int echoPin = 6;   

int servoPin = 7;

int led= 10;

long duration, dist, average;   

long aver[3];   //array for average

void setup() {       

    Serial.begin(9600);

    servo.attach(servoPin);  

    pinMode(trigPin, OUTPUT);  

    pinMode(echoPin, INPUT);  

    servo.write(0);         //close cap on power on

    delay(100);

    servo.detach(); 

} 

void measure() {  

 digitalWrite(10,HIGH);

digitalWrite(trigPin, LOW);

delayMicroseconds(5);

digitalWrite(trigPin, HIGH);

delayMicroseconds(15);

digitalWrite(trigPin, LOW);

pinMode(echoPin, INPUT);

duration = pulseIn(echoPin, HIGH);

dist = (duration/2) / 29.1;    //obtain distance

}

void loop() { 

  for (int i=0;i<=2;i++) {   //average distance

    measure();               

   aver[i]=dist;            

    delay(10);              //delay between measurements

  }

 dist=(aver[0]+aver[1]+aver[2])/3;    

if ( dist<50 ) {

//Change distance as per your need

 servo.attach(servoPin);

  delay(1);

 servo.write(0);  

 delay(3000);       

 servo.write(150);    

 delay(1000);

 servo.detach();      

}

Serial.print(dist);

}

Real Time clock Using Arduino

Code:-

#include<LiquidCrystal.h>

#include <DS3231.h>

// Init the DS3231 using the hardware interface

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

DS3231  rtc(SDA, SCL);

void setup()

{ rtc.begin();

  lcd.begin(16,2);

 

 

  

  

  // The following lines can be uncommented to set the date and time

  rtc.setDOW(WEDNESDAY);     // Set Day-of-Week to SUNDAY

  rtc.setTime(5, 32, 00);     // Set the time to 12:00:00 (24hr format)

  rtc.setDate(18, 3, 2020);   // Set the date to January 1st, 2014

}

void loop()

{

  // Send Day-of-Week

  //Serial.print(rtc.getDOWStr());

  lcd.print("DATE:");

  lcd.print(rtc.getDateStr());

  lcd.setCursor(0,2);

  lcd.print(rtc.getTimeStr());

  lcd.setCursor(9,2);

  lcd.print(rtc.getTemp());

 lcd.print("*C");

  

  // Send date

  //Serial.print(rtc.getDateStr());

  //Serial.print(" -- ");

  // Send time

  //Serial.println(rtc.getTimeStr());

  delay(1000);

  // Wait one second before repeating :)

  

}

Temperature controlled Fan using Arduino

Components using:-

Arduino uno

LM35

LCD 16x2

DC Motor With Blade

Circuit

Code:-

 #include<LiquidCrystal.h>

 LiquidCrystal lcd(12,11,5,4,3,2);

 int val;

int tempPin = A0;

int fan=7 ;

void setup()

{

  lcd.begin(16,2);

Serial.begin(9600);

pinMode(fan,OUTPUT);

digitalWrite(fan,LOW);

lcd.setCursor(0,0);

  lcd.print("Welcome in");

  lcd.setCursor(0,2);

  lcd.print("Technical Hut");

  delay(2000);

  lcd.clear();

  lcd.setCursor(0,0);

  lcd.print("Temp controlled");

  lcd.setCursor(0,2);

  lcd.print("cooling System");

  delay(2000);

  lcd.clear();

}

void loop()

{

  

  

val = analogRead(tempPin);

float mv = ( val/1024.0)*5000; 

float cel = mv/10;

lcd.setCursor(0,0);

lcd.print("TEMPRATURE = ");

lcd.print(cel);

lcd.setCursor(0,2);

lcd.print("*C");

delay(1000);

if(cel>40)

{

  digitalWrite(fan,HIGH);

}

else

{ digitalWrite(fan,LOW);

}

}

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