![]() Temperature sensor LM35 senses the temperature and converts it into an electrical (analogue) signal, which is applied to the MCU through an analogue-to-digital converter (ADC). 2: Screenshot of the source code on Arduino IDE It has +10.0mV/Celsius linear-scale factor. ![]() It is rated to operate over a -55☌ to 150☌ temperature range. LM35 is a precision integrated circuit whose output voltage is linearly proportional to Celsius (Centigrade) temperature. It is built around Arduino Uno board (Board1), 16×2 LCD (LCD1), temperature sensor LM35 (IC1) and a few other components.Īrduino is at the heart of the circuit as it controls all functions. 1: Circuit diagram of the temperature-based fan speed control and monitoring using ArduinoĬircuit diagram of the temperature fan speed control and monitoring is shown in Fig. The project will help save energy/electricity. ![]() It can be implemented for several applications including air-conditioners, water-heaters, snow-melters, ovens, heat-exchangers, mixers, furnaces, incubators, thermal baths and veterinary operating tables. The project is very compact and uses a few components only. Sensed temperature and fan speed levels are simultaneously displayed on the LCD panel. The microcontroller (MCU) ATMega8/168/328 allows dynamic and faster control and the LCD makes the system user-friendly. Use of embedded technology makes this closed-loop feedback-control system efficient and reliable. This project is a standalone automatic fan speed controller that controls the speed of an electric fan according to the requirement. ![]()
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