This project automatically protects clothes from rain:

🌧️ Rain detected → Clothes move inside (90°)
☀️ Rain stops → Clothes move outside (0°)

🧰 Components Required

Component	Quantity
Arduino UNO	1
Rain Sensor Module (YL-83)	1
Servo Motor (MG995 recommended)	1
Breadboard	1
Jumper Wires	As needed
5V External Power Supply	1
Rod / Frame (for model)	1

🔌 Circuit Connections

🌧️ Rain Sensor → Arduino

VCC → 5V
GND → GND
DO → Pin 2

🔄 Servo Motor → Arduino

Red → 5V (External supply recommended ⚠️)
Brown/Black → GND
Yellow/Orange → Pin 9

👉 Important:
Connect Arduino GND and external supply GND together

⚙️ Working Explanation

Rain sensor detects water droplets
Arduino reads signal
If rain:
- Servo rotates to 90°
- Clothes move inside
If no rain:
- Servo rotates back to 0°
- Clothes go outside

💻 Full Arduino Code


#include <Servo.h>

Servo myServo;

int rainSensor = 2;
int rainStatus = 0;

void setup() {
  pinMode(rainSensor, INPUT);
  myServo.attach(9);
  
  Serial.begin(9600);

  myServo.write(0); // Start outside
}

void loop() {
  rainStatus = digitalRead(rainSensor);

  if (rainStatus == LOW) {  // Rain detected
    Serial.println("🌧️ Rain Detected → Moving Inside");
    myServo.write(90);   // Move inside
    delay(2000);
  } 
  else {
    Serial.println("☀️ No Rain → Moving Outside");
    myServo.write(0);    // Move outside
    delay(2000);
  }

  delay(500);
}

🧪 Output Result

Condition	Action
Rain detected 🌧️	Servo → 90° (Clothes inside)
No rain ☀️	Servo → 0° (Clothes outside)

🏗️ Model Design (How to Make)

👉 Simple DIY idea:

Use cardboard base
Attach a rod (hanger pipe)
Connect servo to rod joint
Make it rotate like a door (90° swing)

🖼️ What Your Project Should Look Like

Imagine:

Clothes hanging on rod outside ☀️
When rain starts 🌧️
➡️ Rod rotates automatically
➡️ Clothes move inside (safe area)

🚀 Advanced Version (For High Marks 🔥)

Add these:

Project Introduction

Railway accidents due to broken or cracked tracks are one of the major safety issues in rail transport. To solve this problem, we design a Smart Broken Track Detection System using Arduino, GSM, GPS, LCD and IoT technologies.

This system continuously checks the continuity of railway tracks. If any crack or break occurs, the system instantly detects it and sends alert messages to railway authorities with the exact GPS location.

📝 2. Detailed Article

The Broken Track Detection System is an advanced railway safety project designed to prevent train accidents caused by damaged or cracked tracks. Railway tracks can develop faults due to environmental conditions, heavy load, or poor maintenance. These faults are difficult to detect manually, especially in remote areas. This project provides an automated and reliable solution.

The system is built using an Arduino microcontroller, which continuously monitors the electrical continuity of the railway track. Under normal conditions, current flows through the rails. When a crack or break occurs, the circuit gets interrupted, and the Arduino detects the change immediately.

Once a fault is detected, the system activates multiple safety actions. A buzzer alert and red LED are turned on to indicate danger. At the same time, a GSM module sends an SMS alert to railway authorities. The message includes the exact location using GPS module, which helps in quick maintenance response.

A 16x2 LCD display is used to show real-time track status, such as "Track Safe" or "Track Broken". Additionally, the system can send data to IoT cloud platforms like ThingSpeak or Blynk, enabling remote monitoring of railway track conditions.

This project is low-cost, efficient, and easy to implement on real railway lines. It significantly reduces human effort and improves safety by providing real-time fault detection and communication.

Overall, this system demonstrates how embedded systems and IoT technology can be used to enhance railway safety and prevent accidents.

🎯 3. Objectives of Project

Detect broken railway tracks automatically
Prevent train accidents
Send real-time alert to authorities
Provide exact GPS location
Enable remote monitoring using IoT

🔧 4. Components Required

Component	Quantity
Arduino Uno	1
SIM800L GSM Module	1
NEO-6M GPS Module	1
16x2 LCD Display	1
Buzzer	1
Red LED	1
Green LED	1
Resistors	5
Jumper wires	As required
Breadboard	1
Power Supply	5V
Track Model (metal strip)	1

Arduino Pin Connections

🟢 Basic Components

Component Arduino Pin
Track Detection Wire D4
Green LED (+) D7
Red LED (+) D6
Buzzer (+) D8

👉 All LED (-) and Buzzer (-) → GND

📟 LCD 16x2 Connection (4-bit mode)

LCD Pin Arduino
RS D9
EN D10
D4 D11
D5 D12
D6 D13
D7 A0
VSS GND
VDD 5V
RW GND
VO Potentiometer

📲 GSM SIM800L

GSM Pin Arduino
TX D2
RX D3
GND GND
VCC 4V External Supply ⚠️

📍 GPS NEO-6M

GPS Pin Arduino
TX D5
RX D6 ⚠️ (use voltage divider)
VCC 5V
GND GND

🌐 ESP8266 (IoT)

ESP8266 Arduino
TX A1
RX A2
VCC 3.3V
GND GND

💻 2. Full Arduino Code (All Features)


/*
  🚆 SMART BROKEN TRACK DETECTION SYSTEM
  Features:
  ✔ Track Detection
  ✔ LCD Display
  ✔ GSM SMS Alert
  ✔ GPS Location
  ✔ IoT Cloud Output
*/

#include <SoftwareSerial.h>
#include <LiquidCrystal.h>

// Pin Setup
#define trackPin 4
#define greenLED 7
#define redLED 6
#define buzzer 8

LiquidCrystal lcd(9,10,11,12,13,A0);

// GSM
SoftwareSerial gsm(2,3);

// GPS
SoftwareSerial gps(5,6);

// ESP8266
SoftwareSerial wifi(A1,A2);

String latitude = "";
String longitude = "";

void setup()
{
  pinMode(trackPin, INPUT);
  pinMode(greenLED, OUTPUT);
  pinMode(redLED, OUTPUT);
  pinMode(buzzer, OUTPUT);

  Serial.begin(9600);
  gsm.begin(9600);
  gps.begin(9600);
  wifi.begin(9600);

  lcd.begin(16,2);
  lcd.print("Railway Safety");
  delay(2000);
  lcd.clear();
}

void loop()
{
  int track = digitalRead(trackPin);

  if(track == HIGH)
  {
    // SAFE CONDITION
    digitalWrite(greenLED, HIGH);
    digitalWrite(redLED, LOW);
    digitalWrite(buzzer, LOW);

    lcd.setCursor(0,0);
    lcd.print("Track Status:");
    lcd.setCursor(0,1);
    lcd.print("SAFE         ");

    sendToCloud("SAFE");

    delay(1000);
  }
  else
  {
    // BROKEN TRACK
    digitalWrite(greenLED, LOW);
    digitalWrite(redLED, HIGH);
    digitalWrite(buzzer, HIGH);

    lcd.setCursor(0,0);
    lcd.print("TRACK BROKEN!");
    lcd.setCursor(0,1);
    lcd.print("Sending Alert");

    getGPS();
    sendSMS();
    sendToCloud("BROKEN");

    delay(5000);
  }
}

// 📍 GPS Function
void getGPS()
{
  while(gps.available())
  {
    String data = gps.readStringUntil('\n');

    if(data.indexOf("$GPGGA") >= 0)
    {
      int latIndex = data.indexOf(",")+1;
      int lonIndex = data.indexOf(",", latIndex+1);

      latitude = data.substring(latIndex, latIndex+9);
      longitude = data.substring(lonIndex, lonIndex+9);
    }
  }
}

// 📲 GSM SMS Function
void sendSMS()
{
  gsm.println("AT+CMGF=1");
  delay(1000);

  gsm.println("AT+CMGS=\"+91XXXXXXXXXX\"");
  delay(1000);

  gsm.print("ALERT! TRACK BROKEN ");
  gsm.print("Lat:");
  gsm.print(latitude);
  gsm.print(" Lon:");
  gsm.print(longitude);

  gsm.write(26);
  delay(5000);
}

// 🌐 IoT Cloud Function
void sendToCloud(String status)
{
  Serial.println("Uploading to IoT");

  // Example ThingSpeak API
  /*
  wifi.println("AT+CIPSTART=\"TCP\",\"api.thingspeak.com\",80");
  delay(2000);

  String url = "GET /update?api_key=YOUR_API_KEY&field1=" + status;
  wifi.print("AT+CIPSEND=");
  wifi.println(url.length()+2);
  delay(2000);

  wifi.println(url);
  */
}

✅ Final Output Working

When track is safe
🟢 Green LED ON
📟 LCD = SAFE

When track breaks
🔴 Red LED ON
🔔 Buzzer ON
📲 SMS sent
📍 GPS location sent
🌐 IoT updated
📟 LCD shows alert

🎯 Your Project is Now 10Arduino Pin Connections

🟢 Basic Components

Component	Arduino Pin
Track Detection Wire	D4
Green LED (+)	D7
Red LED (+)	D6
Buzzer (+)	D8

👉 All LED (-) and Buzzer (-) → GND

📟 LCD 16x2 Connection (4-bit mode)

LCD Pin	Arduino
RS	D9
EN	D10
D4	D11
D5	D12
D6	D13
D7	A0
VSS	GND
VDD	5V
RW	GND
VO	Potentiometer

📲 GSM SIM800L

GSM Pin	Arduino
TX	D2
RX	D3
GND	GND
VCC	4V External Supply ⚠️

📍 GPS NEO-6M

GPS Pin	Arduino
TX	D5
RX	D6 ⚠️ (use voltage divider)
VCC	5V
GND	GND

🌐 ESP8266 (IoT)

ESP8266	Arduino
TX	A1
RX	A2
VCC	3.3V
GND	GND

💻 2. Full Arduino Code (All Features)


/*
  🚆 SMART BROKEN TRACK DETECTION SYSTEM
  Features:
  ✔ Track Detection
  ✔ LCD Display
  ✔ GSM SMS Alert
  ✔ GPS Location
  ✔ IoT Cloud Output
*/

#include <SoftwareSerial.h>
#include <LiquidCrystal.h>

// Pin Setup
#define trackPin 4
#define greenLED 7
#define redLED 6
#define buzzer 8

LiquidCrystal lcd(9,10,11,12,13,A0);

// GSM
SoftwareSerial gsm(2,3);

// GPS
SoftwareSerial gps(5,6);

// ESP8266
SoftwareSerial wifi(A1,A2);

String latitude = "";
String longitude = "";

void setup()
{
  pinMode(trackPin, INPUT);
  pinMode(greenLED, OUTPUT);
  pinMode(redLED, OUTPUT);
  pinMode(buzzer, OUTPUT);

  Serial.begin(9600);
  gsm.begin(9600);
  gps.begin(9600);
  wifi.begin(9600);

  lcd.begin(16,2);
  lcd.print("Railway Safety");
  delay(2000);
  lcd.clear();
}

void loop()
{
  int track = digitalRead(trackPin);

  if(track == HIGH)
  {
    // SAFE CONDITION
    digitalWrite(greenLED, HIGH);
    digitalWrite(redLED, LOW);
    digitalWrite(buzzer, LOW);

    lcd.setCursor(0,0);
    lcd.print("Track Status:");
    lcd.setCursor(0,1);
    lcd.print("SAFE         ");

    sendToCloud("SAFE");

    delay(1000);
  }
  else
  {
    // BROKEN TRACK
    digitalWrite(greenLED, LOW);
    digitalWrite(redLED, HIGH);
    digitalWrite(buzzer, HIGH);

    lcd.setCursor(0,0);
    lcd.print("TRACK BROKEN!");
    lcd.setCursor(0,1);
    lcd.print("Sending Alert");

    getGPS();
    sendSMS();
    sendToCloud("BROKEN");

    delay(5000);
  }
}

// 📍 GPS Function
void getGPS()
{
  while(gps.available())
  {
    String data = gps.readStringUntil('\n');

    if(data.indexOf("$GPGGA") >= 0)
    {
      int latIndex = data.indexOf(",")+1;
      int lonIndex = data.indexOf(",", latIndex+1);

      latitude = data.substring(latIndex, latIndex+9);
      longitude = data.substring(lonIndex, lonIndex+9);
    }
  }
}

// 📲 GSM SMS Function
void sendSMS()
{
  gsm.println("AT+CMGF=1");
  delay(1000);

  gsm.println("AT+CMGS=\"+91XXXXXXXXXX\"");
  delay(1000);

  gsm.print("ALERT! TRACK BROKEN ");
  gsm.print("Lat:");
  gsm.print(latitude);
  gsm.print(" Lon:");
  gsm.print(longitude);

  gsm.write(26);
  delay(5000);
}

// 🌐 IoT Cloud Function
void sendToCloud(String status)
{
  Serial.println("Uploading to IoT");

  // Example ThingSpeak API
  /*
  wifi.println("AT+CIPSTART=\"TCP\",\"api.thingspeak.com\",80");
  delay(2000);

  String url = "GET /update?api_key=YOUR_API_KEY&field1=" + status;
  wifi.print("AT+CIPSEND=");
  wifi.println(url.length()+2);
  delay(2000);

  wifi.println(url);
  */
}

✅ Final Output Working

When track is safe
🟢 Green LED ON
📟 LCD = SAFE

When track breaks
🔴 Red LED ON
🔔 Buzzer ON
📲 SMS sent
📍 GPS location sent
🌐 IoT updated
📟 LCD shows alert

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🧰 Components Required

🔌 Circuit Connections

🌧️ Rain Sensor → Arduino

🔄 Servo Motor → Arduino

⚙️ Working Explanation

💻 Full Arduino Code

🧪 Output Result

🏗️ Model Design (How to Make)

🖼️ What Your Project Should Look Like

🚀 Advanced Version (For High Marks 🔥)

Project Introduction

📝 2. Detailed Article

🎯 3. Objectives of Project

🔧 4. Components Required

Arduino Pin Connections

🟢 Basic Components

ComponentArduino PinTrack Detection WireD4Green LED (+)D7Red LED (+)D6Buzzer (+)D8 👉 All LED (-) and Buzzer (-) → GND

📟 LCD 16x2 Connection (4-bit mode)

LCD PinArduinoRSD9END10D4D11D5D12D6D13D7A0VSSGNDVDD5VRWGNDVOPotentiometer

📲 GSM SIM800L

GSM PinArduinoTXD2RXD3GNDGNDVCC4V External Supply ⚠️

📍 GPS NEO-6M

GPS PinArduinoTXD5RXD6 ⚠️ (use voltage divider)VCC5VGNDGND

🌐 ESP8266 (IoT)

ESP8266ArduinoTXA1RXA2VCC3.3VGNDGND

💻 2. Full Arduino Code (All Features)

✅ Final Output Working

When track is safe 🟢 Green LED ON 📟 LCD = SAFE When track breaks 🔴 Red LED ON 🔔 Buzzer ON 📲 SMS sent 📍 GPS location sent 🌐 IoT updated 📟 LCD shows alert

🎯 Your Project is Now 10Arduino Pin Connections

🟢 Basic Components

📟 LCD 16x2 Connection (4-bit mode)

📲 GSM SIM800L

📍 GPS NEO-6M

🌐 ESP8266 (IoT)

💻 2. Full Arduino Code (All Features)

✅ Final Output Working

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Labels

Component Arduino Pin
Track Detection Wire D4
Green LED (+) D7
Red LED (+) D6
Buzzer (+) D8

👉 All LED (-) and Buzzer (-) → GND

LCD Pin Arduino
RS D9
EN D10
D4 D11
D5 D12
D6 D13
D7 A0
VSS GND
VDD 5V
RW GND
VO Potentiometer

GSM Pin Arduino
TX D2
RX D3
GND GND
VCC 4V External Supply ⚠️

GPS Pin Arduino
TX D5
RX D6 ⚠️ (use voltage divider)
VCC 5V
GND GND

ESP8266 Arduino
TX A1
RX A2
VCC 3.3V
GND GND

When track is safe
🟢 Green LED ON
📟 LCD = SAFE

When track breaks
🔴 Red LED ON
🔔 Buzzer ON
📲 SMS sent
📍 GPS location sent
🌐 IoT updated
📟 LCD shows alert