Design and fabrication of bluetooth AC digital multimeter

Date

4-2014

Degree

Bachelor of Science in Electrical Engineering

Major Course

Major in Electronics Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Adrian Augusto M. Sumalde

Abstract

The study focused on the design and fabrication of a Bluetooth AC Digital Multimeter.The design is composed of the analog front-end block data processing block and the transmission block. The analog front-end block was composed of the AC voltage and AC current sensing circuits that converts AC parameters into small DC voltages for the ADC . The data processing block features a gizDuino+mimi board with ATmega 64 microcontroller that interprets the data relates them back into AC parameters. The controller board also prepares the signals for Bluetooth communication. The transmission block is composed of the EGBT-045MS module. The blocks were integrated on a single-sided 4"x6" PCB and housed on a custom plastic enclosure. Test leads connected to the jacks of the board served as the input. Initial tests showed that the ADC can sense the voltage levels derived from the AC parameters. An Arduino code developed in Arduino Development Environment instructs the meter to send values depending on the incoming serial data. The program was uploaded to the MCU. The software developed by Ilang-Ilang (2013) serves as the PC interface. Tests using the fabricated meter showed that the measured parameters were comparable to that of a digital multimeter. However, the readings can be further improved by integrating noise reduction techniques and coding. The design was extended to a system of three meters that can interact to a single PC.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2014 E64 N37

Document Type

Thesis

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