DESIGN AND CONSTRUCTION OF A SMART MICROCONTROLLER TEMPERATURE-BASED FAN SPEED CONTROLLER USING ATMEGA328P MICROCONTROLLER AND LIQUID CRYSTAL DISPLAY (LCD)
Keywords:
Temperature, Liquid Crystal Display (LCD), Electric Fan, Automation, Microcontroller Speed Controller SystemAbstract
The rapid growth in technology and the introduction of various microcontroller chips has resulted in design of various control systems. The ability to automatically change the speed of fan in respect to change in the temperature of the surrounding would allow the user to feel comfort without physically to change the speed of fan. This article involves the design and develop a smart microcontroller temperature-based fan speed controller system using Atmega328p microcontroller and liquid crystal display (LCD) that controls the speed of the fan based on the temperature of the environment and display readout using the LCD. The goal of this research is to enable an electric fan to change its speed level automatically in response to temperature changes in the environment. The designed technology creates an atmosphere in which the fan speed is controlled by the system rather than the user. That is the fan automatically regulates itself by sensing the temperature of the room and adjusting itself to suit the temperature of the room. This system consists of temperature sensor, liquid crystal display (LCD) and other relevant electronic components with integration of software programming using ATMEGA328P as the microcontroller. The electric fan automatically switches the speed according to the ambient temperature changes using the temperature sensor LM35. If the temperature is between (18-22) °c, it gives a logic high signal at the output 1 i.e. Relay l. If the temperature is between (22-28) °c, it gives a logic high signal at the output 2.i.e. Relay 2. If the temperature is between (28-32) °c, it gives a logic high signal at the output 3.i.e. Relay 3. If the temperature is below the lowest temperature and above the highest temperature, it gives a logic low signal at all outputs it will also presents the expected performance of the automatic fan system, construction of hardware and software development to gather the performance data. Finally, this system performance will be analyzed by comparing performance data to the theoretical end. It produced an advance technology with programmable features and control where the speed of the fan is depending on the changes in room temperature.
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