This document describes a robot that is controlled remotely by an Android application using voice commands. It uses a microcontroller and Bluetooth to connect to an Android device. The microcontroller allows inputs and outputs to control motors and sensors. An Android app allows remote control through a GUI. The microcontroller and Bluetooth module allow wireless communication between the robot and Android device for remote robot control.

1. Submitted by:

2.  Project overview
 Block diagram
 Microcontroller 8051
 Motor Driver IC
 Android app and Bluetooth device
 Schematic & Working of the project
 Advantages
 Applications
 Future scope
 Conclusion

3.  The robot is controlled by a remote android
application using voice commands.
 Remote operation is achieved by any smart-
phone/Tablet etc., with Android OS, upon a
GUI (Graphical User Interface) based touch
screen operation.

4. Transmitter:

5.  It is a smaller computer
 Has on-chip RAM, ROM, I/O ports...
RAM ROM
I/O
Port
Timer
Serial
COM
Port
Microcontroller
CPU
A single chip

6.  8K Bytes of In-System Programmable (ISP)
Flash Memory
 4.0V to 5.5V Operating Range
 Fully Static Operation: 0 Hz to 33 MHz
 256 x 8-bit Internal RAM
 32 Programmable I/O Lines
 Three 16-bit Timer/Counters
 Eight Interrupt Sources
 Full Duplex UART Serial Channel

7. CPU
On-chip
RAM
On-chip
ROM for
program
code
4 I/O Ports
Timer 0
Serial
Port
OSC
Interrup
t
Control
External interrupts
Timer 1
Timer/Counter
Bus
Control
TxD RxD
P0 P1 P2 P3
Address/Data
Counter
Inputs

9.  Android is an open-source operating system
which means that any manufacturer can use
it in their phones free of charge.
 It was built to be truly open. For example,
an application can call upon any of the
phone’s core functionality such as making
calls, sending text messages, or using the
camera.

10. Android is built on the open Linux Kernel.
Furthermore, it utilizes a custom virtual
machine that was designed to optimize
memory and hardware resources in a mobile
environment.

11.  An android app is meant for phones with an
android based operating systems. They can
be downloaded from the android app Market
which is pre-loaded on every android phone.
 Blue control APP and Bluetooth Spp APP are
some examples.

12. Very customizable. Open source operating
system is easily changed, hacked,
manipulated, and molded to fit whatever
functionality you had in mind. Found on all
platforms for all prices depending on what
hardware and software version you are
interested in. The battery is usually
replaceable.

13. ANDROID OS : Android is open source software,
manufacturers can modify the operating
system to suit their respective needs and
phones. This becomes a cheap and feasible
alternative for the manufacturer, as opposed
to developing an operating system in-house
or hiring a software company to do it.

14. i-OS:
It's not available on all carriers but
this is expanding. The battery is not
replaceable which is why all the I
Phone users you know have it plugged
in all the time as the battery
degrades.

15. Windows Phone:
Windows Phone is a closed-sourced, which means that
it is solely developed by the company and
protected by copyright. The Windows Store is
limited as there only a few number of apps

17.  The Android platform includes support for
the Bluetooth network stack, which allows a
device to wirelessly exchange data with
other Bluetooth devices.
 The application framework provides access
to the Bluetooth functionality through the
Android Bluetooth APIs.

19.  Super simple and easy way to interface
using Bluetooth stack.
 3.3V Device with standard 5V DC Power source.
 Can also support SPI Protocol, pins are made
available.
 Low power consumption, Low cost.
 Has high-performance wireless transceiver system
 Can be used to interface with PC, Mac or Android
phones/tablets.

20.  Generic Default Visibility at Software side:HC-
06 or Linvor
 Default Pairing code is not '0000' but '1234'.
 Please use Baud Rate with 8-N-1 connectivity
from other device.
 Works with any microcontroller with Serial
connectivity.

21. +5V
30 pF
30 pF
8.2 K
10 uF
+
11.0592 MHz
EA/VPP
X1
X2
RST
31
19
18
9

22.  L293D is a dual H-bridge motor
driver integrated circuit (IC).
 Motor drivers act as current
amplifiers since they take a
low-current control signal and
provide a higher-current signal.
 This higher current signal is
used to drive the motors.
 L293D contains two inbuilt H-bridge driver circuits. In
its common mode of operation, two DC motors can be
driven simultaneously, both in forward and reverse
direction.

23.  L293D has 2 set of
arrangements where one set
has input 1, input 2, output 1
and output 2 and other set
has input 3, input 4, output 3
and output 4, according to
block diagram if pin no 2 & 7
are high then pin no 3 & 6 are
also high.
 If enable 1 and pin number
2 are high leaving pin number
7 as low then the motor
rotates in forward direction.
 If enable 2 and pin number
10 are high leaving pin
number 15 as low then the
motor rotates in forward
direction.

24.  If enable 1 and pin number 2 are low
leaving pin number 7 as high then the
motor rotates in reverse direction.
 If enable 2 and pin number 15 are high
leaving pin number 10 as low then the
motor rotates in forward direction.

25. THANK YOU