CELL PHONE OPERATED ROBOTIC ASSISTANCE USING SERVO MOTOR

BY:VRINDA GOSWAMIPOOJA DASSUMIT KARMAKARSUMIT VARSHNEYPROJECT MENTOR-Mr. KAMALRAJ SINGH

CONTENTS

Introduction Limitation of robot using RF

circuits or technology DTMF technology Why we used DTMF technology? Control and design steps Milestones

INTRODUCTION Radio control (often abbreviated to R/C

or simply RC) is the use of radio signals to remotely control a device.

The objective of our project is to control the robotic (Robots can be autonomous or semi-autonomous machine) assistance by mobile phone using DTMF technology.

LIMITATION OF ROBOT USING RF - TECHNOLOGY

Conventionally, wireless-controlled robots use RF technology which have the drawback of :-

# Limited working range. # Limited frequency range. # Limited control.

DTMF TECHNOLOGY

In this , the robot is controlled by a mobile phone that makes a call to the mobile phone attached to the robot. In the course of a call, if any button is pressed, a tone corresponding to the button pressed is heard at the other end of the call. This tone is called "Dual Tone Multiple-Frequency" (DTMF) tone.

The robot perceives this DTMF tone with the help of the

phone stacked on the robot.

The received tone is processed by the microcontroller with the help of DTMF decoder.

WHY WE USED DTMF TECHNOLOGY?

Use of a mobile phone for robotic control  can overcome the limitation of RF technology.

It provides the advantage of robust control, working range as large as the coverage area of the service provider, no interference with other controllers and up to twelve controllers.

It has little noise interference.

It ha large bandwidth.

CONTROL AND DESIGN STEPS

For the designing of our project we require we some specific hardware and software and then interfacing the components with each other to accomplish the task required by our project .

Control of robot consists of mainly 3 phases:-

1. Perception 2. Processing 3. Action

HARDWAR REQUIREMENT

The main component of hardware section of our project are given below:-

Microcontroller (Atmega16 or 8051)  Crystal Oscillator (4 MHz) DTMF decoder IC(MT8870) Servo Motor Voltage Regulator (IC 7805) Resistors Capacitors Transistors LEDs

SOFTWARE REQUIREMENT

The software required are :-

1. Keil compiler is used for programming the microcontroller and generating the HEX file.

Language used: Embedded C or Assembly 

2. Proteus ISIS for designing and simulating the circuit.

PERCEPTION

First part is the decoding of DTMF tone generated by pressing a key in calling phone.

Audio signal output from receiving is fed to DTMF decoder chip.

Decoder chip converts DTMF tone into binary codes to be fed to microcontroller.

PROCESSING

After perception stage , microcontroller process the binary codes it receives.

Microcontroller is pre-programmed in C or ASSEMBLY LANGUAGE to perform specific task according to inputs bits.

ATmega16 or 8051 is used for processing.

ACTION

Final stage is rotation of motor based on input given by microcontroller.

Servo motor are driven by PWM generated by the microcontroller.

MILESTONES

STUDY AND RESEARCH (September)

1.This is the basic phase but themost time consuming phase asin this phase we would doextensive research onrobotic assistance.

2. We will be assembling all theprevious works that have beendone and all the possibleinnovations that we can instil inour project work.

KNOWING THE SOFTWARE

(Sept-Oct)

1. Keil compiler is used for programming the microcontroller .

2. Proteus ISIS for designing and simulating the circuit.

All the basic operations and different components which can be simulated with the help of Proteus ISIS and Keil compiler will provide an impetus and act as driving force in our mainstream project.

SIMULATION OF CIRCUIT

(Nov-Jan):

ACTUAL FABRICATION(THE

HARDWARE STAGE) (Feb):

FINAL THESIS (Mar):

1.Study of signal generation and observation.2.We optimized the circuit for better performance.3.Programme codes tested in virtual microcontroller.4.Fault detection and correction.

With the advent of 8th semester, we shallhopefully hit the final nail in the coffin bysynthesizing the the mobile operatedrobotic assistance circuit with the help of anARM industry.

With the completion of our project, we willsubmit the intricate details about thevarious concepts and processing stages ofthe mobile operated robotic assistance circuitin the form of a thesis.