Auto Power Supply Control from 4 Different Sources using Arduino Uno

The Auto Power Supply Control System is designed to seamlessly manage power from four different sources—mains electricity, solar panels, batteries, and generators—ensuring an uninterrupted power supply. Using an Arduino Uno as the central controller, the system detects power availability and automatically switches to the most optimal source based on priority.

Key Components & Working

1. Arduino Uno – The microcontroller that processes sensor data and controls switching between power sources.
2. Relay Modules – Used to switch between power sources safely and efficiently.
3. Voltage Sensors – Detect the availability of each power source and send signals to the Arduino.
4. LCD Display – Shows the active power source in real time.
5. LED Indicators – Indicate which power source is currently in use.
6. Power Sources:
   • Mains Electricity: The default source when available.
   • Solar Panel: Used for renewable energy utilization.
   • Battery Backup: Provides power when mains and solar are unavailable.
   • Generator: Acts as a last resort when other sources fail.

How It Works

1. Source Detection:
   • Voltage sensors continuously monitor the availability of mains, solar, battery, and generator power.
   • The Arduino receives signals from these sensors and determines the most suitable power source.
2. Automatic Switching:
   • If mains power is available, it remains the primary source.
   • If mains fails, the system switches to the solar panel (if charging is sufficient).
   • If solar power is insufficient, the system activates the battery backup.
   • As a last option, the generator is turned on to provide power.
3. Real-Time Monitoring:
   • An LCD display shows the currently active power source.
   • LED indicators visually represent the power transition process.
   • The system automatically restores mains power once it becomes available again.

Features & Benefits

✅ Uninterrupted Power Supply – Ensures seamless switching between sources.
✅ Energy Efficiency – Prioritizes renewable energy sources to optimize power usage.
✅ Automatic Control – No manual intervention required for source selection.
✅ Real-Time Monitoring – Displays power status and active source via an LCD.
✅ Versatile Applications – Suitable for homes, industries, off-grid setups, and backup power systems.

Applications

🔹 Homes & Offices – Ensures a continuous power supply during outages.
🔹 Renewable Energy Systems – Prioritizes solar power utilization.
🔹 Industries & Factories – Reduces downtime due to power failures.
🔹 Rural & Off-Grid Areas – Provides a reliable energy management solution.

The Auto Power Supply Control System is a smart and energy-efficient solution to ensure uninterrupted power in any situation. Let me know if you need circuit diagrams, source code, or modifications! ⚡🔋