Development of dual purpose mcu-based water testing instrument

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

EXECUTIVE SUMMARY: The study aimed to develop a Dual Purpose MCU-Based Water Testing Instrument. The research determined the acceptability of the developed device in terms of functionality, usefulness, safety and maintenance, and design. Likewise, it evaluated the effectiveness of the device in terms of electrical conductivity and alkalinity and acidity of tap, distilled and rain water. The study was conducted mainly at the University of Rizal System, Morong Campus during the school year 2016-2017 from the second semester of 2016 up to the first semester of 2017. The researchers utilized the developmental and descriptive researcher designs. The developmental research was defined as the systematic study of designing, developing and evaluating instructional programs, processes and products that must meet criteria of internal consistency and effectiveness. Moreover, descriptive design was used to determine the level of acceptability of the developed device using a validated questionnaire checklist. This study designed a water testing instrument which used sensor that determines the pH level and electrical conductivity of water sample. The sensor and LCD are connected to the microcontroller to perform the desired output. These have their own different specifications that may affect the functionality and reliability of the design. The study found that the device can be developed using locally available materials and that the developed device to be Very Much Acceptable in terms of functionality, usefulness, and design; and Highly Acceptable in terms of safety and maintenance. Moreover, it was found not effective to measure the pH level distilled water and rain water, and Very Much Effective for tap water. The researchers recommended and suggested large scale production of the developed device for people who are willing to invest on water-refilling station. Furthermore, a recommendation was made on the review of the device for possible modification and improvement to become more effective in measuring the electrical conductivity of water.