ACHARYA INSTITUTE OF TECHNOLOGY

Title of the project:-

BROADBAND OVER POWER LINE

Presented by:- GuidanceBy:-

SANDIP ROY KUSUMA MADAM

VINEET KUMARRAJKAMALNIKHIL

Block Diagram

Components used in power line carrier:

1.DTMF Keypad (Dual tone multiple frequency module)

2.MAX 2323.PLC Modem4.PIC 16F8773 microcontroller5.LCD Display

DTMF signals are analog, and consist of two sine waves which are independent of each other. It is therefore not possible to generate them with only digital components.

DTMF Keypad

The digital signals must instead be converted by means of DACs (Digital-to-Analog Converters) and/or filters, into the desired sinusoidal waveforms. Hence we are using IC UM91215B as a DTMF Generator and IC MT8870 as a DTMF Receiver.

Suppose the frequency we are looking for is 770hz and 1209 Hz in order to detect dialed digit 4. The decoding takes place by implementing a band pass filter at every iteration step looking for a particular Fl and Fh. The decoded digit in the following diagram is 4. Take a look at how 770hz and 1209 Hz are allowed to pass from the band pass filter.

MAX 232

Circuit Diagram for MAX232

PLC MODEM (ATL901151)

Features of PLC modem• Small form factor for easy of system

integration• Bi-directional half-duplex data

communication over the mains• Applicable to universal mains voltage and

frequency up to 250v, 50 – 60 Hz• Protocol independent, data transfer

transparent to user’s data terminals• High noise immunity and reliable data

communication• Simple serial interface to user’s data

devices.• Baud rate of 300 bps.

ATL90115-1 Data port pin out assignment

ATL90115-1 Application Diagram

PIC Microcontroller(PIC16F8773

)

Features of PIC 16F8773MP Lab-IDE v8.10 is used for programming and for Micropro 26 is used for dumping the program into the controller .

MEMORY ORGANIZATION• There are three memory blocks in

each of the PIC16F87X . The Program Memory and Data Memory have separate buses

• The PIC16F87X devices have a 13-bit program counter capable of addressing an 8K x 14 program memory space and have 8K x 14 words of FLASH program memory.

SPECIAL FUNCTION REGISTERS

• The Special Function Registers are registers used by the CPU and peripheral modules for controlling the desired operation of the device.

• The Special Function Registers can be classified into two sets: core (CPU) and peripheral.

• The STATUS register contains the arithmetic status of the ALU.

• The OPTION_REG Register is a readable and writable register.

TIMER MODULE

• Readable and writable 8-bit timer/counter

• 8-bit software programmable prescaler

• Internal or external clock select• Interrupt on overflow from FFh to 00h

USART• The Universal Synchronous

Asynchronous Receiver Transmitter (USART) module is one of the two serial I/O modules. (USART is also known as a Serial Communications Interface or SCI.)

• The USART can be configured as a full duplex asynchronous system that can communicate with peripheral devices such as CRT terminals and personal computers, or it can be configured as a half duplex synchronous system that can communicate with peripheral devices such as A/D or D/A integrated circuits, serial EEPROM's etc.

LCD MODULE(BPI-216)

• BPI-216 LCD modules is 2 X16 Parallel LCD is an 8 bit or 4 bit parallel interfaced LCD.

• This unit allows the user to display text, numerical data and custom created characters.

• The combination receives serial data at 2400 or 9600 baud (switch selectable) and displays it on the LCD.

• The unit has two modes: text and instruction. It defaults to text mode; any data received appears on the screen.

Rs232 Cable

It is for a series of standards for serial binary single ended data and control signals connecting between a DTE

(Data Terminal Equipment) and a DCE (Data Circuit-Terminating Equipment). It

is commonly used in computer serial ports.

THANK YOU