The document details a project that enables the control of electrical appliances via a voice-controlled Android application using a Bluetooth-enabled 8052 microcontroller. It contrasts this proposed system with existing GSM-based key command systems, highlighting advantages such as wireless operation and simplicity. The project outlines the setup, including a block diagram, circuit details, and applications in home automation and remote device control.

1. VOICE CONTROLEDAPPLIANCES
USING 8052 MICRO CONTROLER WITH
BLUETOOTH ON ANDROIDMOBILE
KRISHNACHAITANYA INSTITUTE OF
TECHNOLOGY& SCIENCES
Under the Esteemed guidance of
Sri. M.RAMANA REDDY,M.Tech
Asst.Prof., ECEDept.
presented by:
B.V.SRIDHAR NARAYANA
K.L.V.JEEVANRAJ
K.SAMBASIVAJI
CH.SRINIVASULU
14JU1A0459
14JU1A0420
14JU1A0438
14JU1A0447

2. Abstract
This project is designed to
control electrical appliances using a human voice-
controlled android application. A Bluetooth device
is interfaced to the controlled unit for sensing
signals transmitted by the android application.

3. Contents
 Existing
 Proposed
 Block diagram
 Circuit diagram
 Advantages
 Applications
 Result
 Conclusion
 Future scope

4. Existing project
The existing project is based on key commands
using mobile keypad via GSM module.This project
has some drawbacks due to the use of Aurdino.

5. Operated
by SMS
Operated by
phone call

6. Disadvantages
The system is network dependent.
If user make any mistake while typing message
format, the message will not be acknowledged
by Aurdino,hence the system will not work.

7. Proposed project
The proposed
commands using
project is
android
based on
applications
voice
via
Bluetooth.An 8052 series microcontroller 89S52 is
used in this project as a controlling device.

8. Operated
by Bluetooth

9. Block diagram
8
9
S
Power
supply
Relay1 Load1
Bluetooth
Receiver Decoder
5
2
Load2Relay2

10. Circuit diagram
Hear we are using 40pin
microcontroller.
The 2 relays are connected
to port 1.0 and 1.1
respectively.
The Bluetooth module is
connected to port 3.0 and
3.1.
Power supply isconnected
to pins 20 and 40.

11. Features of 89s52
 4.0V to 5.5V Operating Range
 Full Duplex
 Low-power
 Fast Programming
 Flexible

12. Bluetooth module HC-05
HC-05 Bluetooth module is a SPP(Serial port
protocol),designed for transfer wireless Serial Conn-
ection setup. It makes an easy way to interface with
controller or PC
Bluetooth frequency is 2.4GHz.
It is provide connectivity up to 10-15 meters.

13. Power supply
Stepdown
transformer
Bridge
Rectifier
Capacitive
Filter Load
Voltage
Regulator
Step down transformer converts 230V to 12V.
Bridge rectifier converts 12V A.C to pulsating D.C.
Capacitive filter removes the ripples from the
output of rectifier and gives smoothens the D.C.
7805 voltage regulator converts 12V D.C to 5V
D.C.

14. Relay
A relay is an electrically controllable switch.
 The relay consist of 2 different voltage
sources. 1)small amount of voltage/current on
one side can handle a large amount of
voltage/current.
2)the two voltages are mixed up.

15. Advantages
Can control device without going near the device
Simple operation.
No need to carry separate remote or any other
controlling unit.

16. Applications
Home automation
Remote device control
Irrigation system

17. Result
Bulb-1 ON Bulb-2 ON Bulbs-1&2 ON
Bulbs 1 &2 OFF

18. Conclusion
By using this project we can control and
command the operation any device from any
where near to the devices about 10-15 meters
Without wires.

19. Future scope
User can control the devices by sending a
simple voice or key command.
Here only single user only control the target
devices. We can implemented and extended to
multi users.