Design and Development of a Compact LED-Based Double-Sided PCB Exposure Unit for Instructional Applications
DOI:
https://doi.org/10.11594/ijmaber.07.08.02Keywords:
ADDIE model, developmental research, double-sided PCB, electronics education, instructional technology, ISO 9126 quality model, laboratory equipment evaluation, LED-based PCB exposure unitAbstract
This paper was intended to design, develop, and test a single-sided and double-sided printed circuit board (PCB) double-sided exposure unit involving LED to be used in teaching electronics at electronics laboratories. To achieve its study, the research used a Research and Development (R&D) methodology with the ADDIE model that consists of analysis, design, development, implementation, and evaluation. The device was constructed during the development phase using local materials and an integrated control board comprising of regulated power supply, timer board, each panel of LED, and an alignment system to process a double-sided PCB. Performance testing was done to identify some of the operational parameters, which include DC voltage output, current output, PCB exposure time, development time and etching time. The first trial of optimization showed that with exposure time of 20 seconds, clear and well-defined patterns of the circuit were obtained without affecting quality. The acceptability was measured using a structured evaluation tool that was based on ISO/IEC 9126 standard of quality in electronic engineering to the members of electronics faculty, as well as, students at the Bulacan State University - Main and Bustos campuses. Evaluations made on the device are on the aspects of functionality, reliability, usability, maintainability, portability, operability, and safety. The findings revealed that there was an overall rating all criteria of high ratings that were marked as very acceptable with the computed grand mean of 4.78, representing high satisfaction and an instruction based appropriateness.
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