Dikshya Shree Rath (111ec0154)

Dikshya Routray (111ec0185)

Vishal Mishra (111ec0179)

Jagruti Patel (111ec0182)

Nupur Sahu (111ec0188)

ABSTRACT

This project is a PC based communication tool in office for data (text) transmission

to a individual or multiple users using radio frequency technology.

In most of the offices, if an employer has to convey a message to a particular employee or a

group of employees, he has to call them personally or send the message through a

middleman. But there is a possibility of message to be misinterpreted and there is wastage of

time.

In this proposed system, employer in an office will have a transmission module while the

employees will have one receiver module each. If the employer wants to convey any message

to employees or any particular employee, he can send it through the transmitting module

which is connected to the PC. Receiver section consists of a module which receives the data

and feeds to the microcontroller that displays the message on an LCD. A buzzer is also

interfaced to the microcontroller on the receiver side, which gives intimation that data is

received. Adapting this technique one can eliminate the need of a third person for

communication, so that the exact message is delivered to the desired person.

This project in future can be enhanced, by adding a feature of two way

communication between the employer and the employee(s).

FUTURE SCOPE This system is a rapidly growing field and there are new and improved strategies

popping up all the time. For the most part these systems are all built around the same basic

structure, a central box that monitors several detectors and perimeter guards and sounds an

alarm when any of them are triggered.

This system is best for guiding the perimeter of a house or a business center the points

where an intruder would enter the building. In this system IR sensor is used to detect the

intrusion. Similarly the vibration and temperature sensors recognize vibration disturbances

and accidental fires respectively.

This system can detect intrusion only at discrete points. This system detection

feature can be extended to scanning a complete area. Thus the intrusion into the building can

be detected with much more efficiently.

The redialing feature can also be incorporated such that if the call is not put forward

the first time, the auto dialer will dial the same number until the call is successfully

completed.

A pre-recorded voice message can delivered to the owner notifying him about the intrusion

into the premises.

The addition of the above discussed advancements certainly builds this project into a

much flexible and reliable security system.

BLOCK DIAGRAMS:-

TEASERS SOLVED:- Q: Which microcontroller is used in this project?

A: A 40 pin microcontroller from 8051 family is used in this project.

Q: What is the range of RF?

A: RF range is 50 meters.

Q: What is the frequency it operates at?

A: It operates at a frequency of 315MHz

Q: How is the message transmitted?

A: The message is transmitted through the hyper terminal software, by connecting a PC to the device.

Q: Can this project be implemented without using the hyper terminal?

A: Yes, this project can also be implemented using a GUI application.

HARDWARE

REQUIREMENTS:

8051 series Microcontroller,

Push buttons,

Transformer,

Regulator,

LED, LCD,

Resistors, Capacitor,

RF module, Level Shifter IC,

DB9 connector.

SOFTWARE REQUIREMENTS:

Keil compiler

Languages: Embedded C or Assembly.