Over Voltage & Under Voltage Load Protection with GSM Alert

The Over Voltage & Under Voltage Load Protection System with GSM Alert is a smart monitoring and protection system designed to safeguard electrical appliances from damage due to voltage fluctuations. This system automatically disconnects the load when the voltage exceeds or drops below a predefined safe limit and sends real-time alerts via GSM to notify the user.

Key Components & Working:

1. Arduino Microcontroller – The brain of the system, continuously monitoring voltage levels.
2. Voltage Sensor – Measures the input voltage and provides real-time data.
3. Relay Module – Acts as a switch to disconnect or reconnect the load based on voltage conditions.
4. GSM Module (SIM800L/SIM900A) – Sends SMS alerts when an overvoltage or undervoltage condition is detected.
5. LCD Display – Shows real-time voltage readings and system status.
6. Buzzer/LED Indicator – Provides local alerts for voltage fluctuations.
7. Power Supply Unit – Ensures stable power for the Arduino and modules.

How It Works:

• Step 1: The voltage sensor continuously measures the incoming power supply.
• Step 2: The Arduino processes the voltage data and checks if it is within the safe operating range.
• Step 3: If the voltage exceeds the upper limit or drops below the lower limit, the system:
  ✅ Triggers a relay to disconnect the load.
  ✅ Activates a buzzer or LED for local warning.
  ✅ Sends an SMS alert to the user via the GSM module.
• Step 4: Once the voltage returns to the safe range, the system automatically reconnects the load and sends a recovery SMS.

Features & Benefits:

✅ Prevents damage to appliances from voltage fluctuations.
✅ Real-time GSM alerts ensure remote monitoring.
✅ Automatic load disconnection for protection.
✅ LCD display for real-time voltage monitoring.
✅ Cost-effective solution for households and industries.

Applications:

• Home & industrial electrical safety.
• Protecting sensitive devices (computers, refrigerators, motors).
• Remote monitoring of power fluctuations in factories.
• Automatic voltage protection in commercial buildings.

This Over/Under Voltage Protection System with GSM Alerts is a must-have for protecting expensive electrical equipment and ensuring a safe and stable power supply. Let me know if you need a circuit diagram or code for this project! 🚀