Hot Wire Anemometer using Arduino

📘 Introduction

Accurate wind speed measurement plays a vital role in meteorology, renewable energy systems, environmental monitoring, and industrial safety applications. Traditionally, wind speed has been measured using mechanical cup anemometers or vane-based systems. However, with advancements in sensor technology and embedded systems, electronic methods such as hot wire anemometry have become increasingly popular due to their high sensitivity and fast response time.

The Hot Wire Anemometer using Arduino is an innovative wind speed measurement system based on the principle of heat transfer. In this method, a hot filament (hot wire) is heated electrically, and the cooling effect caused by airflow changes its temperature and resistance. This variation in resistance is converted into a measurable voltage signal using a voltage divider circuit. The Arduino microcontroller processes this signal and calculates the corresponding wind speed. The measured value is then displayed on an LCD screen for real-time monitoring.

This project combines heat transfer principles, electronic signal processing, and embedded programming to create a cost-effective and reliable digital wind speed measurement system suitable for educational and practical applications.

🎯 Objectives

1. To design and develop a hot wire based wind speed measurement system.

2. To measure wind speed using heat dissipation principle.

3. To implement a voltage divider circuit for resistance-to-voltage conversion.

4. To process sensor data using an Arduino microcontroller.

5. To display real-time wind speed values on an LCD display.

6. To create a low-cost and reliable alternative to conventional anemometers.

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