This paper presents an inventive prototype design of ventilation fan with smart features. uses a microcontroller to create an automation function. automatically according to the temperature which set by the user. This is to ensure the cooling process, especially for large space and also in hot weather due to global warming works well and effectively. An LM35 temperature sensor is placed in the room temperature. The PIC16F887 temperature detected by the sensor. Users initially set the temperature to ON the fan together with overheat temperature to ON the buzzer. If the the ventilation fan will function while the buzzer will produce sound when it is set value. Thus, through this circuit, it is easy to use and make human's life simpler and better. This paper presents an inventive prototype design of ventilation fan with smart features.uses a microcontroller to create an automation function. The ventilation fan operate automatically according to the temperature which set by the user. This is to ensure the cooling especially for large space and also in hot weather due to global warming works well and effectively. An LM35 temperature sensor is placed in the room 16F887 microcontroller circuit will control the ventilation fan based on temperature detected by the sensor. Users initially set the temperature to ON the fan together with overheat temperature to ON the buzzer. If the room's temperature is more than set value, the ventilation fan will function while the buzzer will produce sound when it is set value. Thus, through this circuit, it is easy to use and make human's life simpler and better. This paper presents an inventive prototype design of ventilation fan with smart features. It he ventilation fan operates automatically according to the temperature which set by the user. This is to ensure the cooling especially for large space and also in hot weather due to global warming works well and effectively. An LM35 temperature sensor is placed in the room to sense the room microcontroller circuit will control the ventilation fan based on temperature detected by the sensor. Users initially set the temperature to ON the fan together room's temperature is more than set value, the ventilation fan will function while the buzzer will produce sound when it is high than the set value. Thus, through this circuit, it is easy to use and make human's life simpler and better.Research Article Special Issue I. M. Yassin et al. J Fundam Appl Sci. 2017, 9(3S), 779-790 780
Fish production has significant impacts on the investment and operating costs of the modernization of fish ponds. Water quality monitoring system may help to overcome all the problems by using the implementation of the internet of things (IoT) technology. The project aims in detecting the presence of fishes using an ultrasonic sensor and investigating the parameters of pH and temperature sensors. The system is used pH and temperature sensor as the factors affecting the quality of water and fish growth, the ultrasonic sensor for detecting the presence of fishes, Blynk application through a smartphone for notifications, NodeMCU ESP8266 as its central controller and wireless fidelity (WI-FI) as the communication technology. A sample of three different measurement times in the early morning, midday, and evening based on temperature, pH levels and the fish distance show that this farm has high-quality water. From the measurement at the field test, temperature value increase in the midday, pH level remains constant in the three different times and the fish distance underwater always changes as a fish needs to find oxygen and a portion of food. As a result, a farmer need not hire workers at their site, consequently, drive down operating costs and improve efficiency.
Effective teaching and learning, not only taking into account the good teaching methodology and facilities but the acoustic level in the classroom should also be addressed. RT-60 is the time required for sound decay in a classroom. The time taken for the sound to decay depends on the absorption coefficients (α) of surface material and the volume of the room. This paper aims to identify potential treatment materials for improving the value of RT-60 of the selected unoccupied teaching hall/classroom at one of the higher learning institution in Malaysia. The value of RT-60 is calculated using Sabine formula and used the same parameter like the surface material, surface area, and room’s volume identified in previous research. The best RT-60 value is 0.6s for the classroom with 10k-20k cubit feet in volume and it coincides with the volume of the selected classroom which is about 14320 cubic feet. To ensure that room has the optimum RT-60 values, the materials used on the ceiling, walls, floors, windows, and doors are assessed for sound absorption rate and then materials with appropriate absorption coefficient are proposed for improvement purposes. As a result, it found that gypsum board is suitable to use for wall and plywood 12mm thick is proposed for ceiling material. By applying this proposed material will then enhance the acoustical performance of the unoccupied teaching hall especially in RT-60 value.
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