This ppt presentation is to develop a home automation system with a touch screen based control panel based on microcontroller Edgefxkits.com has a wide range of electronic projects ideas that are primarily helpful for ECE, EEE and EIE students and the ideas can be applied for real life purposes as well. http://www.edgefxkits.com/ Visit our page to get more ideas on popular electronic projects developed by professionals. Edgefx provides free verified electronic projects kits around the world with abstracts, circuit diagrams, and free electronic software. We provide guidance manual for Do It Yourself Kits (DIY) with the modules at best price along with free shipping.

1. Touch Screen based Home
Automation System

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Introduction:
 Home automation can be extended to operate electrical appliances like
HVAC ( heating, air-conditioning, and ventilation) security system for
gates and doors.
 Thus, it provides a convenient, comfort and energy efficient centralized
controlling of all the primary electrical system at home.
 Home automation has become even simpler with touch screen technology.
Owners familiar with the icon system appreciate Touch Screen Based
Home Automation Systems is user friendly.
Touch Screen based Home
Automation System

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Touchscreen:
 There are two types of touchscreen currently available in the market.
 We are using a capacitive touchscreen for our project. Capacitive
touchscreen relays on electrical properties of the human body to detect
where and when the user touches.
 Thus, it has an advantage that is capacitive displays controlled with very
light finger touches.
Touch Screen based Home
Automation System
• capacitive touchscreen
• resistive touchscreen.

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 Use them with gloves or mechanical stylus.
 These touchscreen have been used widely for cell phone industry.
 A capacitive touchscreen has an insulator such as glass that is coated
with indium tin oxide. Since a human body also acts as an electrical
conductance, touching the screen results in a distortion of screen’s
electrostatic field, measured as a change in capacitance.
Touch Screen based Home
Automation System

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System operation:
 Our system has both hardware and software component. As such data
collection is done in hardware and processing of data, and subsequent
controlling are done in the software and output circuit which are
connected to electrical appliances.
Touch Screen based Home
Automation System

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Block Diagram:
Touch Screen based Home
Automation System

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Touch Screen based Home
Automation System

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Hardware Requirements:
 Power Supply Block
 Microcontroller At89s52/At89c51
 Touch Panel
 Rf Transmitter & Rf Receiver (Ht12e/Ht12d)
 Opto-Isolator
 Triac
 Regulators
 Crystal Oscillator
 Diodes
 Resistors
 Capacitors
Touch Screen based Home
Automation System

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Software Requirements:
 Keil compiler
 Languages: Embedded C or Assembly
Touch Screen based Home
Automation System

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Power Supply:
Touch Screen based Home
Automation System

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RF Transmitter and Receiver:
 RF modules are divided into three groups, RF transmitter module, RF
receiver module and RF transceiver module
 433MHz ASK transmitter and receiver is used for the remote control.
Touch Screen based Home
Automation System

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Opto-isolator:
 Opto-coupler MOC3061/63, A LED SCR Type Combination.
 Opto Coupler Is A Six Pin Ic.
 Additionally While Using This Ic With Microcontroller, One Led
Can Be Connected In Series With Ic Resulted In Indicate. When
High Power Is Given By The Micro Controller Such That We Can
Know That The Current Is Flowing In Internal LED Of The Opto-
IC.
 When Logic High Is Given Current Flows Through Led From Pin
1 To 2. So In This Process LED Light Falls On SCR Causing 6
And 4 To Close Only At The Zero Cross Of The Supply Voltage.
Touch Screen based Home
Automation System

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TRIAC:
 Triode for Alternating Current (TRIAC), is a generalized trade name for
an electronic component which can conduct current in either direction
when it is triggered (turned on). It is formally called a bidirectional triode
thyristor or bilateral triode thyristor.
Touch Screen based Home
Automation System

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Conclusion:
 Further the project can be enhanced by using GSM modem interfaced to
the control unit.
 Using GSM modem, the user can control home appliances by sending an
SMS.
 Advantage of using this technology is that there is not range limitation
when compared to RF technology.
Touch Screen based Home
Automation System

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