Assembling and Testing of a Microcontroller Based Smart System Suitable for Controlling Brushless Fan

Abstract

This research focuses on testing and assembling of a microcontroller based smart system suitable for controlling brushless fan that will detect temperature in a room, maintain and adjusts a speed of a cooling fan. The automation system comprises of Arduino Uno board, Microcontroller, temperature sensor, DC brushless motor and other electronics components. The Atmega328P-PU Microcontroller was used in programming the system, the microcontroller coordinates the functions of the entire system and the Pulse Width Modulation (PWM) signals from the microcontroller served as regulatory tools to the fan. All the components were tested and gave out the desired result. Potentiometer was used initially before placing the LM35 temperature sensor by using hot soldering iron which corresponds with voltage values between 0-5V on Multimeter reading and 5 to 254 serial monitor reading by varying the duty cycle 0 to 100 with approximately 500Hz frequency. Six different temperature values were obtained from the circuit by varying the LM35 temperature sensor and responds to the amount of heat supplied which regulate the cooling fan on regular basis. The current temperature values displayed on LCD screen, also the aimed of the work has achieved