Project:Automatic School Bell System Using Arduino

 Hey techies, welcome back to EngHme .We all know that when we were at school someone was waiting near the school bell to ring the bell. He had to come and ring the bell every once in a while. But what if it can be automated. Yes, it is very simple and we can do it with Arduino. So in this tutorial, we will be making an automatic school bell system using an Arduino.

 

Required components:

Circuit Diagram: Automatic School Bell System Using Arduino 

 

Code arduino: Automatic School Bell System Using Arduino 

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DS1302.h>
// Set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x3F, 16, 2);

int Hour;
int Min;
int Sec;
int period;
int in1 = 8; 
int in2 = 9;
int activate=0;
Time t;

// Init the DS1302
DS1302 rtc(2, 3, 4);

void setup()
{
pinMode(8, OUTPUT);
pinMode(9, OUTPUT); 
// Set the clock to run-mode, and disable the write protection
rtc.halt(false);
rtc.writeProtect(false);

// Setup LCD to 16x2 characters
lcd.begin();
Serial.begin(9600);

// The following lines can be commented out to use the values already stored in the DS1302
// rtc.setDOW(SUNDAY); // Set Day-of-Week to FRIDAY
// rtc.setTime(10, 30, 30); // Set the time to 12:00:00 (24hr format)
// rtc.setDate(23, 03, 2020); // Set the date to August 6th, 2010

}

void loop()
{
// Display time on the right conrner upper line

lcd.setCursor(0, 0);
lcd.print("Time: ");
lcd.setCursor(6, 0);
lcd.print(rtc.getTimeStr());
t = rtc.getTime();
Hour = t.hour;
Min = t.min;
Sec = t.sec;

//Display Period Number
lcd.setCursor(0, 1);
lcd.print("Period No: ");
lcd.setCursor(11, 1);
lcd.print(period);

//Period timing, when bell will ring, you can add more period if you want
if ((Hour== 7 && Min== 0 && Sec<= 5)||(Hour== 7 && Min== 30 && Sec<= 5)||(Hour== 8 && Min== 0 && Sec<= 5)||(Hour== 8 && Min== 30 && Sec<= 5)||(Hour== 9 && Min== 30 && Sec<= 5)||(Hour== 10 && Min== 0 && Sec<= 5)||(Hour== 10 && Min== 30 && Sec<= 5)||(Hour== 11 && Min== 0 && Sec<= 5)) {
digitalWrite(in1, HIGH); 
digitalWrite(in2, LOW);

Serial.println("motor is running");
if (activate == 0){
period = period +1;
activate =1;
}
}
else if (Hour== 9 && Min== 0 && Sec<= 7) { // Recess break time (Long ring bell)
digitalWrite(in1, HIGH); 
digitalWrite(in2, LOW);
lcd.setCursor(11, 1);
lcd.print("Break");
delay(500);
lcd.clear();
}
else if (Hour== 11 && Min== 30 && Sec<= 7) { // School time over (Long Ring bell)
digitalWrite(in1, HIGH); 
digitalWrite(in2, LOW);
lcd.setCursor(11, 1);
lcd.print("Over");
period =0;
delay(500);
lcd.clear();
}

else { // stop motor
digitalWrite(in1, LOW); 
digitalWrite(in2, LOW);
activate =0;
}

delay (500);
}