Fans are commonly used in places where the temperature is normally. Also, the concept of Smart Home is getting popular all around the world even though the concept was known for decades. The problems arise when all the fan’s speed is adjustable; however, this can be done manually. It means that if the user wants to change the speed, they have to move to the fan the push the button by themselves. Another drawback is that many people forget to turn the fan off after they have finished using it. They just leave the place and do not notice that the fan is left opened. This has resulted in the increase of the electricity bill and 5-10% of electricity consumed is wasted. Sometimes it may cause a fire because the fan works by the rotation of a motor; if the motor keep operates for a long time, it produces the heat and the fan body is made of plastic which can be set fire quite easy. A system that is controlled by remote device such as remote control is a better idea due to the ease of non-contact to the system directly. The system that will be developed in this research will be called “Smart Fan”. The smart fan can adjust its speed level according to the room temperature. Additionally, it starts working when the user sits in place such as on a sofa or chairs. After the user leaves the seat, the fan should stop working. This was supposed to bring the user comfortability and energy reduction consumption.
ABSTRACT
When it is hot, using a fan is an inexpensive choice compared to spending more on using an air conditioner especially in some areas where high temperature is naturally normal. Some problems, nonetheless, arisen such as users forget to turn off when being away, some people might get a feeling of annoyance and perhaps frustration when getting up from the seat in order to adjust the speed. These result in a rise of electricity bill from leaving the fan on when it is not in use and it may cause disasters, fire for example, when the motor gets heated up. A prototype of smart fan was built in this research using ESP8266 as a microcontroller, LM35 and HC-SR04 are used to measure temperature for speed control and detect the user for automatic on/off respectively. A group of participants used the prototype and they were interviewed to give some feedbacks, comments, and suggestions from the experiences after using it. The results show that they were satisfied from the automation; it gave the sense of staying in a modern house with an automatic wind blower. It also assisted to reduce energy consumption according to target group. Some users stated that the environment and atmosphere in the room was not too hot because the fan was working in the background. This has shown that the prototype significantly gave the participants a feeling of relaxation and comfortability and also was a part of energy and cost reduction.
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