Guided by

Nehal Chitaliya (Assistant Prof.)

Presented by

Sanghavi Manan A (07 ECM 62)Trivedi Hardik D (07 ECG 79)

Group No.6

• Introduction• Block diagram• Component Details• How does it work ??????• Flow chart• Software Description• Application• Future Extension • Enhancement • Conclusion

The project aims at providing wireless (point to multi-point) data transfer capability between the PC and the notice board.

Microcontroller base small scale Embedded System

The user can type the messages to be displayed on the remote display board using the hyper terminal of the PC and can be sent to the notice board using different transmission techniques .

• GSM Technology :-• Global System for Mobile Communication is a globally accepted

standard for digital cellular communication.

• RF Modules:-• An RF wireless communication system operating in the presence

of a periodic noise environment, includes first and second wireless devices,

• Bluetooth :-• Bluetooth is an open wireless protocol for exchanging data over

short distances from fixed and mobile devices

System Block Diagram

PC

PIC µcBased

EmbeddedSystem

RS 232 Communication

FM X’mitter

FMReceiver

PIC µcBased

EmbeddedSystem

20X4 LCD Display

WirelessComm.

PowerSupply PIC 16F877

MAX 232

RS232

PC

FM X’mitter

20*4 LCD Display

TXRX

5V+ LED

1

LED

2

4MHz

230V AC

Power supply gives 5VDC from 230 V AC input.

MAX232 used to interface PC TO PIC.

PIC reads characters from pc AND display on LCD stores in EPROM send char to FM transmitter.

LED blinks during communication buzzer sounds during communication recognize the key press encode the data and send data for controlling relay.

PowerSupply PIC 16F877

FM Receiver

20*4 LCD Display

RX

5V+ LED

1

LED

2

4MHz

230V AC

AMP

Power supply gives 5VDC from 230 V AC input.

Microcontroller PIC16F877 reads characters from SER input displays on LCD stored in EPROM .

LED blinks during char receive condition when command is received for charging relay status it takes action for SW on relay or SW OFF relay

PIC 16F877RS 232 Cable4*20 LCD DisplayLedsFM TransmitterBuzzerMAX 232

PIC 16F8774*20 LCD DisplayLedsFM Receiver

For Receiver

Why we used PIC 16F877 ?

It is a RISC machineIt consists 37 instructionsIt has a suffice memory require

for project.It has an inbuilt I2C module.

Flowchart Of transmitter

Flowchart of Receiver

We have used PIC basic Editor (PROTON+) for programming.

With PROTON+ we can write debug and compile the code within the same windows environment.

It allows to program and the code produced fully compatible with the device.

Supported devices :- 12-bit, 14-bit, 16-bit core devices.

We are using tera term for serial communication.

Uses in Banks

Stock Exchange

Uses in Educational sector

Information purpose

Here we are making only one point to one point communication.

But we will extend this project to one point to multi point communication system.

In this project **1,**2,**3 are protocol between wireless transmitter and receiver but for second receiver **4,**5,**6 are protocol etc

This technology can be used for broader application with the help of Further Enhancements. Such as:-

It can be used to cover a wider range by the use of Effective RF Transmitter and Receiver.

Even we can increase the size of LCD so that it will be more practical and advanced with its various features like wireless communication, remote controlling and monitoring.

With combination of mobile technology we can sending and receiving email on this device.

Form this project we conclude implementing Wireless Notice Board that:-  

It eliminates the use of a printer.

It is user friendly i.e., any layman can operate it.

Messages can be sent anytime & corrected instantaneously.

Messages lasts until the power in switched off.