Automatic-Temperature-Control-System
🔥 Automatic Temperature Control System
This project is an Arduino-based system that automatically controls the speed of a DC fan using a 10k NTC thermistor. It is capable of adjusting fan speed based on temperature, with user-configurable limits, and includes features like real-time LCD display and a buzzer alarm for over-temperature warning.
📘 Project Overview
This project demonstrates how a microcontroller (Arduino UNO) can be used to monitor and control temperature within a system. The core functionality includes:
- Reading temperature using an NTC Thermistor
- Adjusting fan speed using PWM and a power MOSFET (IRFZ44N)
- Allowing the user to set upper and lower temperature thresholds
- Displaying real-time information on a 16x2 LCD
- Triggering a buzzer alarm if the temperature exceeds the upper limit
🧰 Components Used
| Component | Description |
|---|---|
| Arduino UNO | Main microcontroller |
| NTC Thermistor 10k | Senses temperature based on resistance |
| IRFZ44N MOSFET | Controls the fan speed |
| 16x2 LCD | Displays temperature and fan status |
| Buzzer | Audible alert for over-temperature |
| Push Buttons | For setting temperature limits |
| DC Fan | Cooling component |
| Potentiometer | Adjusts LCD contrast |
🛠️ How It Works
- The system constantly reads temperature using the thermistor.
- It calculates the exact temperature using the Steinhart-Hart equation.
- If temperature > set limit, the fan activates using PWM through the MOSFET.
- A buzzer sounds if the temperature exceeds the maximum threshold.
- The user can set temperature ranges using the push buttons.
📊 Simulation
This project was simulated using Proteus. The circuit includes:
- Thermistor input
- LCD interface
- PWM-controlled fan via IRFZ44N
- EEPROM-based memory for saving threshold settings
📷 Screenshots / Circuit Diagram
