Plug and play sensor-based multialarm Mervin A. Salubre...[et. al]

Thesis (Bachelor of Science in Electronics Engineering) -- University of Rizal System-Morong.

Executive Summary: The Plug and Play Sensor-Based Multi-alarm was developed through utilization of programmable microcontroller and analog sensors which were based on the concept of plug and play configuration. The study aimed the following objectives: design and construct a device that utilizes plug and play configuration of the three different sensors for a hassle-free configuration and determine the level of acceptability of plug and play sensor-based multialarm in terms of accuracy, functionality, safety and maintenance usefulness and workability. The study was conducted at the University of Rizal System- Morong during the second semester of Academic Year 2016-2017 up to the first semester of Academic Year 2017-2018. In order to achieve the desired objectives of the study, the researchers utilized the developmental method of research design. Qualitative description was used in the study and weighted mean was used to determine the level of acceptability of the develop device in terms of accuracy, functionality, safety and maintenance. The researchers determines the level of acceptability of the develop device in terms of accuracy, functionality, safety and maintenance usefulness and workability through a researchers-made and expert-validated questionnaire checklist evaluated by a total of 20 respondents. The respondents consists of 7 engineers and 13 engineering students. The design and construction of plug and play sensor-based multialarm was successful. The features of the device performs its function. It was able to accept three different sensors one at a time and recognizes each sensor that has been plugged in without reconfiguration of the device. Also whenever a sensor was plugged in, the device displays and notifies the users of what type of sensor was currently plugged in. It was also able to read the parameters that was given by each sensors. For the motion sensor, whenever there was a human detected, the alarm would respond. For the smoke sensor, it was able to display the smoke content in the air and whenever the smoke content reaches the threshold value for harmful smoke content in the air, the alarm would respond. Also for carbon monoxide sensor, it was able to display the carbon monoxide content in the air and the alarm would respond whenever the carbon monoxide content in the air exceeded the set value for harmful carbon monoxide content. The device was also highly accepted as perceived by the respondents. For the evaluation of the acceptability in terms of accuracy, it was concluded that the device was highly accepted as evaluated y the engineers and the students with an average mean of 4.70. For the acceptability of the device in terms of functionality, it was highly accepted as evaluated by the engineers and students with an average mean of 4.74. In terms of safety and maintenance, it was revealed that the device was highly acceptable as evaluated by the engineers and students with an average mean of 4.78. The device's acceptability in terms of usefulness was also highly acceptable as evaluated by the engineers and students with an average mean of 4.75. Finally, in terms of its acceptability in workability, it was also highly acceptable as evaluated by the engineers and students with an average mean of 4.73. Based on the findings and conclusions, several recommendations were drawn. The number of sensors that will be plugged in must be increased to be more useful in other aspects of monitoring environmental parameters such as floods etc. For the calibration time of each sensors, it was also advisable to lessen or improve the time it takes for calibrating. The size of the device should be reduced since there was already available Arduino Nano which can be compared to the function of Arduino Mega. Finally, the device should be developed further in ways such as interfacing it with a computer with Windows application where all the data from the device will be monitored and can automatically notify the user/s.