This document describes a project to control a robotic arm mounted on a robot using a mobile phone. It includes a basic block diagram, circuit diagram, components used including a microcontroller, DC motor controller, software used for programming. It discusses advantages such as wireless control and applications in scientific and military fields. The future scope involves adding sensors and other features to expand the robot's capabilities.

2. CONTENTS
• Introduction
• Basic block diagram of project
• Circuit diagram
• Components used
• Technology used
• Software used
• Advantages
• Applications
• Future scope

3. INTRODUCTION
• Aim of the project is to use a mobile phone to
control a robotic arm mounted on a Robot.
• Provides robust control, large working range.
• Control of robot involves 3 different phases:
a) Processing
b) Action
c) Detection

4. Basic Block Diagram of Project
MT

5. Circuit Diagram

6. COMPONENTS
Battery 12V
Ic 1 - At89C52
Ic 2 - L293d
Ic 3 - cd7805
DC-Motor 6V
LCD 2 x 1

7. DTMF
Frequencies 1209Hz 1336Hz 1477Hz
697Hz 1 2 3
770Hz 4 5 6
852Hz 7 8 9
941Hz * 0 #
DTMF FREQUENCY KEYPAD
 DTMF decoder is connected to mobile phone via Head-Phone port.
 It generates two frequencies respective to key pressed from mobile.

8. MICROCONTROLLER
• Advanced-RISC architecture.
• 16K bytes of In-System Programmable Flash
Program memory.
• Internal and external interrupts.
• 32 general-purpose registers.
• High-performance, Low-power AVR 8-bit
Microcontroller.

9. DC MOTOR CONTROLLER
L293D
• Microcontroller output is not sufficient to drive
DC motors, so L293D is used.
• L293D comes in 16-pin DIP. It can provide
current upto 600mA at voltages from 4.5V to
36V.
• It can be used to drive inductive loads such as
relays, solenoids etc
• In the project it is used for simultaneous bi-
directional control of two DC motors.

10. The Two Basic States of a Motor Driver
Forward Movement Backward Movement

11. SOFTWARE USED
1. KIEL MICROVISION (EMULATOR)
A HEX file can be created with the help of Keil which is required
for burning onto chip. It has a powerful debugging tool which
detects most of the errors in the program.
2. 8051 LOADER
8051 loader is a software developed by robosapiens. The HEX file
created with the help of keil was selected through it for
programming the microcontroller.

12. ADVANTAGES
• Wireless control
• Usage of remotely controlled military vehicles in
the Winter War .
• Takes in use of the mobile technology which is
almost available everywhere.
• This wireless device has no bound on range and
can be controlled as far as network of cell phone.

13. APPLICATIONS
Scientific
Military and Law Enforcement
Search and Rescue

14. FUTURE SCOPE
IR Sensor
Alarm-Phone Dialer
Adding a Camera