Application of a microcontroller in automatic electrical domestic changeover system

Nura Asghar*

Department of Electrical Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia

Abstract

The design, development, and simulation of an automatic Electrical Mains Changeover System (EMCS) using a PIC microcontroller (μC) has been presented in this study. The system consists of an 18-pin DIP package enhanced flash microcontroller PIC16F84A with a 4 MHz crystal used as the main processor, two switching transistors, two relays, and a Low Voltage Power Supply (LVPS). The electrical mains control signal output at RB0 and RB2 of PortB actuate two switching transistors which drive two relays to operate the loads depending on the availability of mains or backup power source. An assembly language program based on MPLAB IDE has been developed to control the operation of the system. The design and verification of the PIC μC based EMCS in the Proteus 8 simulation platform have been completed successfully.

Keywords

Automatic transfer switch, Switching transistors, Relays, PIC microcontroller, MPLAB IDE

Digital Object Identifier (DOI)

https://doi.org/10.21833/AEEE.2020.02.002

Article history

Received 10 July 2019, Received in revised form 14 November 2019, Accepted 10 December 2019

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How to cite

Nura Asghar (2020). Application of a microcontroller in automatic electrical domestic changeover system. Annals of Electrical and Electronic Engineering, 3(2): 5-7

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