EMBEDDED SYSTEMS & ROBOTICS

PRESENTED BY: SPARSH GUPTA

12244 DCE,GGN

HISTORY OF APPIN TECHNOLOGY LAB

Appin Security Group is a global Information Security company focused on training, consulting and solutions. The company was formed as a merger oftwo entities, XIRS Ventures Inc based in Austin Texas incorporated in 2003 and XIRS Appin incubated inside IIT, Delhi India formed in 2004. Later the name XIRS was dropped from the company and the merged entity is known as Appin Technologies. From USA & India, the company has now expanded its operations to Europe, Africa and South East Asia as well. The company has gone through several mergers and acquisitions and has operated businesses under the trademarks 'Appin Knowledge Solutions', 'XIRS Appin‘Appin Technologies', 'Appin Overseas', 'Appin Software Security' all of whom form a part of the current Appin Security Group.

Definition of Embedded Systems

1.Embedded system: is a system whose principal function is not computational, but which is controlled by a computer embedded within it.2. A general computer is defined not to be an embedded system.3. An Embedded system is some combination hardware and software ,either fixed in capability or programmable ,that is specifically designed for a particular function. 4.Any hardware system which is intended to do a specific task can be called as embedded system

INTRODUCTION :WORLD OF MICROCONTROLLERS

1.The situation we find ourselves today in the field of microcontroller had its beginnings in the development of technology of integrated circuit.2.This development has enabled us to store hundreds of thousands of transistors into one chip.3.The first computers were made by adding external peripherals such as memory ,input /output line, timers and others to it.4. Further increasing of package density resulting in creating an integrated circuit which contained processor & peripherals .That is how the first chip containing a microcomputer later known as MICROCONTROLLER has developed.

8051 MICROCONTROLLER

1. In 1981,Intel corporation introduced an 8 -bit microcontroller known as 8051.2. It had 128bytes RAM,4Kbytes ROM,2timers,1 serial port & 4 ports on a single chip.3. It was referred as “System on a chip”.4. Intel's original MCS-51 family was developed using NMOS technology.5. Later versions, identified by a letter C in their name (e.g., 80C51) used CMOS technology and were less power-hungry than their NMOS predecessors.

A Microcontroller is a application specific programmable device which have inbuilt RAM, ROM, Timers ,I/o peripherals & serial port on a single chip.Some of the features that have made the 8051 popular are:1.4 KB on chip program memory.(ROM)2.128 bytes on chip data memory(RAM).3. 4 register banks.4. 8-bit data bus5.16-bit address bus.6.16 bit timers (usually 2, but may have more, or less).7.3 internal and 2 external interrupts.8.Four 8-bit ports, (short models have two 8-bit ports).9. 16-bit program counter and data pointer.10.1 Microsecond instruction cycle with 12 MHz Crystal.

BLOCK DIAGRAM OF MIRCOCONTROLLER

CPU

On-chip RAM

On-chip ROM for program code

4 I/O Ports

Timer 0

Serial PortOSC

Interrupt Control

External interrupts

Timer 1

Timer/Counter

Bus Control

TxD RxDP0 P1 P2 P3

Address/Data

Counter Inputs

PIN DESCRIPTION OF THE 8051

1234567891011121314151617181920

4039383736353433323130292827262524232221

P1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.7RST

(RXD)P3.0(TXD)P3.1

(T0)P3.4(T1)P3.5

XTAL2XTAL1

GND

(INT0)P3.2(INT1)P3.3

(RD)P3.7(WR)P3.6

VccP0.0(AD0)P0.1(AD1)P0.2(AD2)P0.3(AD3)P0.4(AD4)P0.5(AD5)P0.6(AD6)P0.7(AD7)EAALEPSENP2.7(A15)P2.6(A14)P2.5(A13)P2.4(A12)P2.3(A11)P2.2(A10)P2.1(A9)P2.0(A8)

8051

MY PROJECT : DTMF robot car

CELL PHONE

DTMF DECODER

MICROCONTROLL

ERMOTOR DRIVER

RIGHT MOTOR

LEFT MOTOR

In this project the robot, is controlled by a mobile phone that makes call to the mobile phone attached to the robot in the course of the call, if any button is pressed control corresponding to the button pressed is heard at the other end of the call. This tone is called dual tone multi frequency tone (DTMF)robot receives this DTMF tone with the help of phone stacked in the robot

The received tone is processed by the microcontroller with the help of DTMF decoder MT8870 the decoder decodes the DTMF tone in to its equivalent binary digit and this binary number is send to the microcontroller, the microcontroller is pre programmed to take a decision for any given input and outputs its decision to motor drivers in order to drive the motors for forward or backward motion or a turn.

Working

The mobile that makes a call to the mobile phone stacked in the robot acts as a remote. So this simple robotic project does not require the construction of receiver and transmitter units. DTMF signalling is used for telephone signalling over the line in the voice frequency band to the call switching centre. The version of DTMF used for telephone dialling is known as touch tone. DTMF assigns a specific frequency (consisting of two separate tones) to each key s that it can easily be identified by the electronic circuit. The signal generated by the DTMF encoder is the direct alzebric submission, in real time of the amplitudes of two sine(cosine) waves of different frequencies, i.e. ,pressing 5 will send a tone made by adding 1336hz and 770hz to the other end of the mobile.

CONTINUED

CIRCUIT DIAGRAM OF DTMF ROBO CAR

In order to control the robot, you have to make a call to the cell phone attached to the robot from any phone. now the phone is picked by the phone on the robot through auto answer mode . when you press 2 the robot will move forward when you press 4 the robot will move left when you press 8 the robot will move backwards when you press 6 the robot will move right when you press 5 the robot will stop.

Keypad Working

Snap shots

APLLICATIONS

1) Scientific Remote control vehicles have various scientific uses including hazardous environments, working in the deep ocean , and space exploration. The majority of the probes to the other planets in our solar system have been remote control vehicles, although some of the more recent ones were partially autonomous. The sophistication of these devices has fueled greater debate on the need for manned spaceflight and exploration.

2)Military and Law Enforcement Military usage of remotely controlled military vehicles dates back to the first half of 20th century. Soviet Red Army used remotely controlled Tele tanks during 1930s in the Winter War and early stage of World War II.

3) Search and Rescue  UAVs will likely play an increased role in search and rescue in

the United States. This was demonstrated by the successful use of UAVs during the 2008 hurricanes that struck Louisiana and Texas.

  4)Recreation and Hobby  See Radio-controlled model. Small scale remote control vehicles

have long been popular among hobbyists. These remote controlled vehicles span a wide range in terms of price and sophistication. There are many types of radio controlled vehicles. These include on-road cars, off-road trucks, boats, airplanes, and even helicopters. The "robots" now popular in television shows such as Robot Wars, are a recent extension of this hobby (these vehicles do not meet the classical definition of a robot; they are remotely controlled by a human).

FURTHER IMROVEMENTS & FUTURE SCOPE

1. IR Sensors:  IR sensors can be used to automatically detect & avoid obstacles

if the robot goes beyond line of sight. This avoids damage to the vehicle if we are maneuvering it from a distant place.

   2. Password Protection:  Project can be modified in order to password protect the robot so

that it can be operated only if correct password is entered. Either cell phone should be password protected or necessary modification should be made in the assembly language code. This introduces conditioned access & increases security to a great extent.

 

3. Alarm Phone Dialer:  By replacing DTMF Decoder IC CM8870 by a 'DTMF Transceiver IC’ CM8880, DTMF tones can be generated from the robot. So, a project called 'Alarm Phone Dialer' can be built which will generate necessary alarms for something that is desired to be monitored (usually by triggering a relay). For example, a high water alarm, low temperature alarm, opening of back window, garage door, etc. When the system is activated it will call a number of programmed numbers to let the user know the alarm has been activated. This would be great to get alerts of alarm conditions from home when user is at work.

 4. Adding a Camera:   If the current project is interfaced with a camera (e.g. a Webcam) robot can be driven beyond line-of-sight & range becomes practically unlimited as GSM networks have a very large range.