This project presents the design and implementation of a Solar Powered IoT-Based Smart Controlled DC Fan system aimed at promoting energy efficiency and real-time environmental monitoring. The system utilizes a solar panel as the primary power source, supported by a rechargeable battery to ensure uninterrupted operation. A relay circuit manages the power supply between the solar panel and battery, optimizing energy usage. The core of the system is an Arduino UNO microcontroller, which gathers environmental data from a DHT11 temperature and humidity sensor and monitors power levels using a voltage sensor. Based on the ambient temperature, the Arduino activates a DC fan via a transistor switch, offering automated thermal regulation. To enhance user interaction and remote monitoring capabilities, the system includes an LCD display for real-time local readings and an ESP8266 Wi-Fi module for wireless data transmission. Sensor data along with battery status is uploaded to the WEB dash board, enabling users to track environmental conditions and system performance remotely via the Internet of Things (IoT) infrastructure. This solution demonstrates a sustainable and intelligent approach to climate control using renewable energy, IoT connectivity, and smart automation, making it suitable for homes, greenhouses, and other off-grid applications.    

Objectives:

• To design a solar-powered system for energy-efficient operation.
• To automate DC fan control based on temperature and humidity.
• To monitor voltage levels of the solar and battery system.
• To enable real-time data display on an LCD screen.
• To implement IoT connectivity using the ESP8266 Wi-Fi module.
• To upload sensor data to the web for remote monitoring.

    The major building blocks of this project are:

• Solar Panel.
• Charging circuit.
• LM2596.
• Relay.
• Rechargeable battery.
• Arduino UNO.
• DHT11(Temperature and humidity) sensor.
• LCD display.
• DC fan.
• Esp8266 WI-FI module.
• Relay.

    Software Used:

• Arduino IDE studio compiler for Embedded C programming.
• Express SCH for Circuit design.
• WEB technology.

   

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