This document discusses home automation using an Android application. It describes how devices like lights and appliances can be controlled wirelessly via Bluetooth using an Arduino Uno microcontroller board connected to an HC-05 Bluetooth module. An L293D driver circuit is used to control motors and other loads. The system allows disabled or physically challenged people to remotely control home devices from their mobile phone for smart home applications at low cost.

1. HOME AUTOMATION USING
ANDROID APPLICATION
By
G.Jayashankar (119X1A0433)

2. CONTEXT
 Introduction
 What is home automation
 Block diagram
 Components
 About ardiuno uno
 Advantages
 Applications
 Conclusions

3. INTRODUCTION
 There is increasing demand for smart homes,where
appliances react automatically to changing
environmental conditions.
 Can be easily controlled through one common
device.
 The possible solution the user controls devices by
employing a FPGA(Field Programmable Gate
Array).

4. What is Home Automation?
 Home automation involves computerised or
automatic control of some electronic and electronics
systems.
 The lightining, temperature, etc., can be controlled by
the remote mobile host controller.
 These devices communicate wirelessly through the
bluetooth with the host device.

5. BLOCK DIAGRAM

7. ARDUINO UNO

8. ● Arduino is a popular open-source single-board
microcontroller.
● Arduino is the micro controller board based on
Atmega328.
● Arduino is a hardware can be programmed using a
wiring-based language(similar to C++).
● It has 14 digit input/output pins of which 6 can be
used as PWM output.
● It works with 16M Hz crystal oscillator.
● It has in built boot loader.

9. ● Official Arduinos have used the AtmegaAVR series of
chips, specifically the ATmega8,ATmega168, ATmega328,
ATmega1280, and ATmega2560.
● A handful of other processors have been used by Arduino
compatibles.
● Most boards include a 5volt linear regulator and a 16MHz
crystal oscillator.
● Although some designs such as the LilyPad run at 8MHz
and dispense with the onboard voltage regulator due to
specific form-factor restrictions.

10. SPECIFICATIONS
 Micro controller : Atmega328
 Operating voltage : 5V
 Digital I/O pins : 14(6 provide PWM output)
 Analog pins : 6
 Flash memory : 32Kb of which 0.5kB is used for boot
loader.
 SRAM : 2Kb
 Clock speed : 16MHz
 EEPROM : 1Kb

11. HC 05 BLUETOOTH MODULE

12. ●HC-05 module is an easy to use Bluetooth SPP (Serial Port
Protocol) module. designed for transparent wireless serial
connection setup.
●Serial port Bluetooth module is fully qualified Bluetooth
V2.0+EDR (Enhanced Data Rate) 3Mbps Modulation with
complete 2.4GHz radio transceiver and baseband.
●It uses CSR Bluecore 04-External single chip Bluetooth system
with CMOS technology and with AFH(Adaptive Frequency
Hopping Feature).
●It has the footprint as small as 12.7mmx27mm. Hope it will
simplify your overall design/development cycle

13. Specifications of HC05:
● Typical-80dB sensitivity
● Up to +4dBm RF transmit power
● Low Power 1.8V Operation ,1.8 to 3.6V I/O
● PIO control
● UART interface with programmable baud rate
● With integrated antenna
● With edge connector

14. DRIVER CIRCUIT(L293DNE)

15. ●The L293DNE are quadruple high-current half-H drivers.
●The L293 is designed to provide bidirectional drive currents of
up to 1 A at voltages from 4.5 V to 36V.
●The L293 is designed to provide bidirectional drive currents of
up to 600-mA at voltages from 4.5 V to 36 V.
● Both devices are designed to drive inductive loads such as
relays, solenoids, dc and bipolar stepping motors, as well as other
high-current/high-voltage loads in positive-supply applications.

16. SPECIFICATIONS
 Wide Supply-Voltage Range: 4.5 V to 36 V
 Separate Input-Logic Supply
 Internal ESD Protection
 Thermal Shutdown
 High-Noise-Immunity Inputs
 Functionally Similar to SGS L293 and SGS L293D
 Output Current 1 A Per Channel (600 mA for L293D)
 Peak Output Current 2 A Per Channel (1.2 A for L293D)
 Output Clamp Diodes for Inductive Transient Suppression
(L293D)

17. ADVANTAGES:
 The main advantage of “home automation using
android application” is to “Physicaly challanged and
disabled persons ”.
 They are mainly used in the smart home applications.
 The wireless tehnology is especialy use to inter
connect the infrastructure to control.
 It could be suitably used in the home automation in
low cost .
 The overall system is fast enough to realise the true
power in wireless technology.

18. APPLICATIONS:
 As there is an increse in demand of smart homes,
where appliances react automaticaly to the change in
the environment.
 This wireless technology is especially usefull in home
environment .
 Where exist hardly any infrastructure to inter connect
intelligent appliances .

19. CONCLUSION:
 Home automation is undeniably a resource which
can be home environment automated.
 People can control their electrical devices via these
home automation devices and setup controlling
actions through mobile.
 In future these product may have high potential for
marketing.