LIST OF COMMUNICATION PROJECTS

Wireless Message Communication between Two Computers

PROJECT DESCRIPTION

The aim of this project is to develop a system for wireless message communication between two computers using 2.4 GHz trans-receiver units.

In offices, communication between employees is essential. This project uses a pair of 2.4 GHz transceiver modules duly powered by 5 volt DC and alarm circuits. They are used for bidirectional real time chat communication from one PC to another wirelessly using hyper terminal.

While one of the user attempts to initiate a chat, intimation upon that message is received first by a buzzer sound. There after the other user can start communicating over the chat mode from his PC.

A pair of transceiver modules are connected to the PCs using a DB9 (De-Sub) connector and through serial data cord using RS232 protocol communication between the module and the PC. An on-board dedicated ac to dc power supply is used at both ends to power the units.

This concept in future can be further enhanced to link more number of systems forming a network of dedicated computers such that number of employees can communicate with each other. NOTE: The project works only on operating systems having hyper terminal (E.g. Windows XP). The computer must have a RS232 serial port.

BLOCK DIAGRAM

DETAIL

APPLICATION

 

Touch Screen based Home Automation System

The main objective of this project is to develop a home automation system with a touch screen based control panel.

As technology is advancing so houses are also getting smarter. Modern houses are gradually shifting from conventional switches to centralized control system, involving touch screen switches. Presently, conventional wall switches located in different parts of the house makes it difficult for the user to go near them to operate.

Even more it becomes more difficult for the elderly or physically handicapped people to do so. Remote controlled home automation system provides a simpler solution with touch screen technology. Touch screen control panels are also designed for commercial, industrial and medical systems.

In order to achieve this, a touch panel is interfaced to the microcontroller on transmitter side which sends ON/OFF commands to the receiver where loads are connected. By touching the specified portion on the touch screen panel, the loads can be turned ON/OFF remotely through wireless technology.

The microcontroller used here is of 8051 family. The loads are interfaced to the microcontroller using opto-isolators and triacs.

Further the project can be enhanced by using GSM modem interfaced to the control unit. Using GSM modem, the user can control home appliances by sending an SMS. Advantage of using this technology is that there is not range limitation when compared to RF technology.

RF Controlled Robotic Vehicle with Laser Beam Arrangement

The project is designed to control a robotic vehicle by using a RF technology for remote operation. A low power laser light is interfaced for demonstrating the possibilities of destroying a distant object by its beam. An 8051 series of microcontroller is used for the desired operation.

At the transmitting end using push buttons, commands are sent to the receiver to control the movement of the robot either to move forward, backward and left or right etc. At the receiving end two motors are interfaced to the microcontroller where they are used for the movement of the vehicle.

The RF transmitter acts as a RF remote control that has the advantage of adequate range (up to 200 meters) with proper antenna, while the receiver decodes before feeding it to another microcontroller to drive DC motors via motor driver IC for necessary work.

A laser pen is mounted on the robot body and its operation is carried out from the microcontroller output through appropriate signal from the transmitting end. The laser light used is just for demonstration purpose and not a powerful one.

Further the project can be enhanced using DTMF technology. Using this technology we can control the robotic vehicle by using cell phone. This technology has an advantage over long communication range as compared to RF technology.

RF based Home Automation System

he main objective of this project is to develop a home automation system with a RF controlled remote. As technology is advancing so houses are also getting smarter. Modern houses are gradually shifting from conventional switches to centralized control system, involving RF controlled switches.

Presently, conventional wall switches located in different parts of the house makes it difficult for the user to go near them to operate. Even more it becomes more difficult for the elderly or physically handicapped people to do so. Remote controlled home automation system provides a simpler solution with RF technology.

In order to achieve this, a RF remote is interfaced to the microcontroller on transmitter side which sends ON/OFF commands to the receiver where loads are connected. By operating the specified remote switch on the transmitter, the loads can be turned ON/OFF remotely through wireless technology.

The microcontroller used here is of 8051 family. The loads are interfaced to the microcontroller using opto-isolators and triacs.

Unique Office Communication System using RF

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).

NOTE: The project works only on operating systems having hyper terminal (E.g. Windows XP). The computer must have a RS232 serial port.

PC Based Electrical Load Control

The aim of this project is to control the electrical appliances through a personal computer (PC). For example, theatre lighting can be centrally controlled form the PC for better stage management.

Presently, they are manually managed which makes it difficult to coordinate the lighting with the respective scene. With this system, one can control the electrical appliances ON/OFF by just being seated at one place using a PC.

This system is integrated with the electrical loads and also connected to the PC where centralized control takes place. It uses an RS-232 protocol from the microcontroller to communicate with the PC.

To turn on/off the appliances, we use Hyper Terminal on PC. Once the connection is established with the PC, then the system starts working. The microcontroller used in this project belongs to 8051 family.

This project can be further enhanced by implementing a GUI based control panel on the PC with appropriate embedded software. The intensity control can also be incorporated using power electronics devices.

Note: The project works only on operating systems having hyper terminal (E.g. Windows XP). The computer must have a RS232 serial port.

Security System using Smart Card Technology

This project is designed to gain access to an area or control a device by using a valid smart card only. The security of any organization is the top most priority for the concerned authorities. For this reason only, the authorized person with a valid smart card is allowed to operate the device/ to access a secure area.

Earlier, human supervision was required to monitor all these parameters, but with this proposed system no supervision is required as only authorized persons are provided with valid smart cards to operate devices.

A smart card reader is provided to read data from the card assigned to the authorized personnel. The smart card reader is interfaced to an 8051 family microcontroller. Whenever the data read by the smart card matches with the data on the microcontroller then LCD would display that the card is authorized and a relay is used simultaneously to switch ON a lamp (indicating a device or access to secure area).

If an invalid card is inserted in the smart card reader, it displays that the card is not authorized and the load (i.e. lamp) remains OFF indicating that the user is not authorized to access the particular area/device. This project can be enhanced further by integrating GSM modem such that any attempt of unauthorized access is made, then an alert SMS is sent to the concerned department.

Further it can be upgraded to RFID / Thumb / IRIS identification system for higher degree of security system.

Automatic Wireless Health Monitoring System in Hospitals for Patients

In this project, a wireless communication system is designed and developed for remote patient monitoring. The primary function of this system is to monitor the temperature of a patient’s body, and display the same to the doctor through RF communication.

In hospitals, where patient’s body temperature needs to be constantly monitored, is usually done by a doctor or other paramedical staff by constantly observing the temperature and maintaining a record of it.

It is a very tedious method. In this proposed system transmitting module continuously reads patient’s body temperature through a digital temperature sensor, displays it on the LCD screen and sends it to the microcontroller which transmits the encoded serial data over the air by RF (radio frequency) through an RF module.

At the receiving end, a receiver is used to receive the data, decode it and feed it to another microcontroller which is then displayed on an LCD screen. The receiver module is kept in the doctor’s chamber to continuously display the patient’s body temperature wirelessly.

This project can be further enhanced by sensing and displaying other vital statistics of a patient like blood pressure, pulse rate etc. Another feature can be added where a warning signal is generated if the parameters cross the safe limit.

 

 

 

 

 

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