🚛❄️ Microcontroller-Based Temperature Control & Monitoring System for Refrigerated Trucks ❄️🚛

An intelligent, embedded system designed to maintain and monitor temperature in refrigerated transport vehicles — combining real-time temperature sensing, adaptive cooling, predictive control, and power optimization.

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📌 Overview

This project implements a microcontroller-based system that keeps the internal temperature of a refrigerated truck near 10°C using:

• 🔍 Real-time monitoring (LM35 temperature sensor)
• ❄️ Peltier module with PWM-based cooling
• 🌬️ DC fans for heat dissipation
• 🔊 Buzzer alerts for overheat
• 🖥️ OLED display for visual feedback
• ⚡ Preemptive & adaptive control logic for efficiency

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🔧 Hardware Components

Component	Quantity	Description
ATmega328P	1	Microcontroller unit
LM35 Temperature Sensor	1	Analog temperature sensor
SSD1306 OLED Display	1	I2C 0.96" display
TEC1-12706 Peltier	1	Thermoelectric cooling module
L293D Motor Driver	1	Dual motor driver for fans
DC Fan (12V)	2	For air circulation
Buzzer	1	Audio alert for over-temperature
LM7805 Voltage Regulator	1	5V regulated output
Custom PCB	1	Designed using EasyEDA
12V Power Supply	1	External DC power source

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🧠 Features

• ⚙️ Adaptive Peltier Control
  Linearly scaled PWM based on real-time temperature (10°C–18°C).

• 🧊 Preemptive Cooling Activation
  Starts cooling early if a rapid temperature rise is detected.

• 💡 OLED Auto-Sleep
  Powers down display during stable temperature to conserve energy.

• 📢 Overheat Alert
  Buzzer warns if temperature exceeds safe limits (above 11°C).

• 📟 Live Display
  OLED shows temperature, fan speed, and Peltier duty cycle.

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🧪 How It Works

1. System reads current temperature using LM35.
2. Calculates temperature trend to predict rise.
3. Activates fan and Peltier module based on:
   • Current temperature
   • Rate of change
4. Displays live data on OLED (unless temp is stable).
5. Alerts user with buzzer if above 11°C.

Demo Video: https://www.youtube.com/watch?v=KpXQiDIcKAY

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📝 Documentation

• 📄 Research Paper PDF
• 📦 Patent Proposal Draft

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👨‍💻 Contributors

• Rajlakshmi Desai
• Samiksha Nalawade
• Dhanshree Biradar
• Manas Kulkarni

👨‍🏫 Mentor: Dr. Pravin G. Gawande

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📜 License

This project is intended for academic and research purposes. For commercial use or patent-related queries, please contact the authors.

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🔗 Related Tags

#EmbeddedSystems #ColdChainLogistics #TemperatureControl #ATmega328P #IoT #PeltierCooling #SmartLogistics #PCBDesign

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