kindlky provide materails for the wireless ac power 230v electrical appoliances controlling system.

To get information about the topic Remote Control of Electrical Appliance using
Wireless Technology “GSM” full report ppt and related topic refer the page link below

Abstract:

This paper presents an idea of automatic switching ON/OFF of electrical appliance using GSM (Global System for Mobile
Communication).Now a days to lead a healthy, tense less life it is very important that we have clarity in mind about the house. So this
paper mainly helps in automating the appliance like fan, light and other house hold appliances from any part of the world using GSM
technology. It is designed such that a single SMS code ‘on’ will switch ON the device and ‘off’ will switch OFF the device, it also gives
the status of the appliance as a feed back. This requires a GSM modem, SIM, micro controller, relay, mobile. The system can be
operated from a handset of the individual. Hence it is very comfortable and economical to maintain.

Introduction

Wide growth of wireless communication made me think of
using the mobile phones for controlling the electrical
appliance .This can be done simply by sending an SMS from
the users handset .The system do not require any wired
connections for the automatic control of electrical appliance
it can just be done with the help of a Micro controller
interfaced with the GSM modem .A system being proposed
is economical, robust to use and portable. An individual to
perform his job easily at workplace he/she should be
comfortable with the costly electrical/electronic appliances at
home; the idea in this paper relieves them from such
problems and also saves power. There are many ways of
automatic control mechanisms using Bluetooth automation,
voice commands. This paper describes a GSM SMS based
automation system.

System Description

The system proposed in his paper consists of both hardware
and software components .The hardware components are
GSM modem handset with a driver, 8051 microcontroller
(AT89C51), input/output peripherals, SIM, power circuit,
timer, crystal oscillator. The software parts include the
microcontroller embedded c programming and other GSM
modem commands to communicate with the public network
and receive/send the SMS. Micro controller programming
helps to communicate the hardware components and the
modem. The SMS format is totally pre defined .Whenever
the modem receives command from the user it communicates
with the controlling system and then operates the switching
system. The detailed explanation of the different modules is
discussed below.

Micro Controller

This system is designed with the micro-controller
(AT89C51) and a timeout generator circuit. This works as
the heart of the system. On receipt of the SMS message, text
words are checked with predetermined format which
includes desired device ON/OFF commands. To read a
message the microcontroller sends the appropriate AT
command to the Receiver GSM Modem through UART. The
Modem then responds with the message and the
microcontroller stores the message in the RAM. When the
message ends there is no way to know by the
microcontroller. The time-out generator circuit performs the
vital function of providing the microcontroller board with
the ability to detect the end of a message from the receiver
GSM mobile. The output of the time-out generator circuit
(connected to port1_3 of the microcontroller) is low until the
message is being received and becomes high at the end of
the message. The microcontroller then processes the
command and sends the appropriate controlling signal to the
switching module.

Remote Control of Electrical Appliance using
Wireless Technology “GSM”

Introduction
Wide growth of wireless communication made me think of
using the mobile phones for controlling the electrical
appliance .This can be done simply by sending an SMS from
the users handset .The system do not require any wired
connections for the automatic control of electrical appliance
it can just be done with the help of a Micro controller
interfaced with the GSM modem .A system being proposed
is economical, robust to use and portable. An individual to
perform his job easily at workplace he/she should be
comfortable with the costly electrical/electronic appliances at
home; the idea in this paper relieves them from such
problems and also saves power. There are many ways of
automatic control mechanisms using Bluetooth automation,
voice commands. This paper describes a GSM SMS based
automation system.
2.System Description
The system proposed in his paper consists of both hardware
and software components .The hardware components are
GSM modem handset with a driver, 8051 microcontroller
(AT89C51), input/output peripherals, SIM, power circuit,
timer, crystal oscillator. The software parts include the
microcontroller embedded c programming and other GSM
modem commands to communicate with the public network
and receive/send the SMS. Micro controller programming
helps to communicate the hardware components and the
modem. The SMS format is totally pre defined .Whenever
the modem receives command from the user it communicates
with the controlling system and then operates the switching
system. The detailed explanation of the different modules is
discussed below.
2.1. SIM Card and Handset
Mobile consists of SIM (Subscribers Identifying Module),
every user has specific number and the communication
occurs through this specified number, the communication
takes place in wireless mode using GSM technology. The
appliance is controlled by the user via SMS.
2.1.1 Receiver Modem
Modem placed at home receives the message from the user
via public network. The received SMS is processed using
Micro controller programming. Micro controller is interfaced
with the input peripheral that is receiving modem. Micro
controller is interfaced with the modem via UART. Then it
communicates with hardware system and works over the
switching module i.e., switching ON/OFF the target device.
Any hand set that supports attenuation commands can
interface with the GSM modem. The GSM modem used here
is SIM 300 which supports these commands, AT commands
is used to control the modem.
2.1.2 Power Circuit Module
A 230V power is given to the step down transformer. Then it
is stepped down to 12V AC. Then it is rectified using bridge
rectifier. From here the supply is given to the micro
controller which helps in performing the switching
operation.
Micro Controller
This system is designed with the micro-controller
(AT89C51) and a timeout generator circuit. This works as
the heart of the system. On receipt of the SMS message, text
words are checked with predetermined format which
includes desired device ON/OFF commands. To read a
message the microcontroller sends the appropriate AT
command to the Receiver GSM Modem through UART. The
Modem then responds with the message and the
microcontroller stores the message in the RAM. When the
message ends there is no way to know by the
microcontroller. The time-out generator circuit performs the
vital function of providing the microcontroller board with
the ability to detect the end of a message from the receiver
GSM mobile. The output of the time-out generator circuit
(connected to port1_3 of the microcontroller) is low until the
message is being received and becomes high at the end of
the message. The microcontroller then processes the
command and sends the appropriate controlling signal to the
switching module.
2.5 Switching Module
This module drives (switches ON/OFF) the appliance
according to the command sent in the SMS. The switching
module is controlled by the microcontroller. The switching
module may be in the form of a relay which allows a low
power circuit to switch a relatively high current on or off for
example a bulb connected to the 220V mains supply. This
module drives (switches ON/OFF) the appliance according
to the command sent in the SMS. The switching module is
monitored and controlled by the microcontroller. The
switching module may be in the form of a relay which
allows a low power circuit to switch a relatively high current
on or off for example a bulb connected to the 220V mains
supply.