Arduino Based Automatic Air Control System with Pulse Width Modulation

Being in a tropical country, Filipinos often experience hot and humid climate. This problem results to Filipinos using and buy expensive air conditioning units and coolers. In addition, it consumes a large amount of power leading to a high electricity bill. To solve this problem, the proponents think on an alternative solution to it. In this paper, Arduino Programming is used in order to control the Automatic Air Control System. Temperature sensors are added in order to monitor the changes in the temperature. Also there is a 12 V DC fan connected to the Arduino. As the temperature changes, the Arduino sends signal to the 12 V DC fan, depending on the temperature reading, the fan speed will vary from levels 1 up to 3. And the user will be expecting temperature as low as 15 degrees Celsius. This is because of the help of the Arduino Microcontroller itself and the If-Else function of the Arduino programming language and also the Pulse Width Modulation. The microcontroller has two sensors attached and able to get its average to display it in the serial port of the Arduino Program on PC, the readings of the sensors will depend always with the area of the room and its surrounding temperature. The cooler is expected to breeze at below 15 degrees Celsius depending on the ice inside of the cooler. The prototype has been tested and measured and find out that it is working as planned.