ppt

A Unique method for giving the electricity

bill using wireless technology

EasyElectricity WirelessBilling

Arun Kumar.R (377EC07002)Arun Kumar.T.R (461EC07005)

Poorna Chandra.M (461EC07029)Pradeep.V.S (461EC07030)

Harish Kumar Choudhary.R (482EC07023)

AIM OF OUR PROJECT

• Static energy meter are already widely in use today, but have to be read manually leading to human error and consequent inconvenience to both the distributor and consumer in correcting such errors, this device provides a better solution for such errors.

• The project entitled “Easy electricity wireless billing” is to develop a Static meter that can be also read remotely via a wireless communication link.

What is energy meter ?

• An energy meter or electric meter is a device that measures the amount of electrical energy supplied to a residence or business. These are customers of an electric company.

• The most common type is more properly known as a (kilo)watt-hour meter or a joule meter.

• The most common type of electricity meter is the Thomson or electro mechanical induction watt-hour meter, invented by Elihu Thomsun in 1888.

BASIC BLOCK DIAGRAM OF EEWB

-----------

Po

wer

su

pp

ly

custo

mer m

ob

ile

MAIN BLOCK IN EEWB

• E-METER• MICROCONTROLLER• 2X16 LCD DISPLAY• RTC• EEPROM• GSM• PC

ENERGY MEATER

• The electromechanical induction meter operates by counting the revolutions of an aluminum disc which is made to rotate at a speed proportional to the power.

• The number of revolutions is thus proportional to the energy usage. It consumes a small amount of power, typically around 2 watts.

• The metallic disc is acted upon by two coils. One coil is connected in such a way that it produces a magnetic flux proportional to the voltage and the other produces a magnetic flux proportional to the current.

• The field of the voltage coil is delayed by 90 degrees using a lag coil. This produces eddy currents in the disc and the effect is such that a force is exerted on the disc proportional to the product of the instantaneous current and voltage.

• A permanent magnet exerts an opposing force proportional to the speed of rotation of the disc - this acts as a brake which causes the disc to stop spinning when power stops being drawn rather than allowing it to spin faster and faster. This causes the disc to rotate at a speed proportional to the power which drives the register.

• The register is a series of dials which record the being used. This type of meter is used on a single phase AC supply. Different phase configurations use additional voltage and current coils.

• The aluminum disc is supported by a spindle which has a worm gear amount of energy used.

• The dials are an odometer-like display that is easy to read where for each dial a single digit is shown through a window in the face of the meter, or of the pointer type where a pointer indicates each digit.

• It should be noted that with the dial pointer type, adjacent pointers generally rotate in opposite directions due to the gearing mechanism.

MICRO CONTROLLER(P89V51RD2)

Features• 80C51 Central Processing Unit• 5 V Operating voltage from 0 to 40

MHz• 64 kB of on-chip Flash program

memory with ISP (In-System Programming) and IAP (In-Application Programming)

• Supports 12-clock (default) or 6-clock mode selection via software or ISP

• SPI (Serial Peripheral Interface) and enhanced UART

• PCA (Programmable Counter Array) with PWM and Capture/Compare functions

• Four 8-bit I/O ports with three high-current Port 1 pins (16 mA each)

• Three 16-bit timers/counters• Programmable Watchdog timer (WDT)• Eight interrupt sources with four priority

levels• Second DPTR register• Low EMI mode (ALE inhibit)• TTL- and CMOS-compatible logic levels

2X16 LCD DISPLAY

FEATURES

• 5 x 8 dots with cursor• Built-in controller (KS 0066 or

Equivalent)• + 5V power supply (Also available for +

3V)• 1/16 duty cycle• B/L to be driven by pin 1, pin 2 or pin

15, pin 16 or A.K (LED)• N.V. optional for + 3V power supply

REAL TIME CLOCK DS1307(RTC)

PIN DESCRIPTION• VCC - Primary Power Supply• X1, X2 - 32.768kHz Crystal

Connection• VBAT - +3V Battery Input• GND - Ground• SDA - Serial Data• SCL - Serial Clock• SQW/OUT - Square Wave/Output

Driver

FEATURES• Real-time clock (RTC) counts seconds, minutes,

hours, date of the month, month, day of the week, and year with leap-year compensation valid up to 2100

• 56-byte, battery-backed, nonvolatile (NV) RAM for data storage

• Two-wire serial interface• Programmable square wave output signal• Automatic power-fail detect and switch

circuitry• Consumes less than 500nA in battery backup• mode with oscillator running• Optional industrial temperature range: -40°C

to +85°C• Available in 8-pin DIP or SOIC• Underwriters Laboratory (UL) recognized

EEPROM(24C04)

PIN DESCRIPTION• PRE- Write Protect Enable• E1-E2 - Chip Enable Inputs• SDA - Serial Data Address Input /

Output• SCL - Serial Clock• MODE - Multibyte /Page Write Mode (C

version)• WC - Write Control (W version)• VCC - Supply Voltage• VSS - Ground

FEATURES• 1 MILLION ERASE/WRITE CYCLES With 40 YEARS

DATA RETENTION• Single Supply Voltage: – 3v To 5.5V For St24x04 Versions – 2.5V To 5.5V For St25x04 Versions• Hardware Write Control Versions: ST24W04 And ST25W04• Programmable Write Protection• Two Wire Serial Interface, Fully I2c Bus

Compatible• BYTE And MULTIBYTE WRITE (Up To 4 BYTES)• PAGE WRITE (Up To 8 BYTES)• BYTE, RANDOM And SEQUENTIAL READ MODES• Self Timed Programming Cycle• Automatic Address Incrementing• Enhanced Esd/Latch Up Performances

GSM MODEM

Interfaces• Data: RS232 –DB9 connector• SIM300• Antenna • Power supply -12VDC• SIM card reader: 3V/5V interface with SIM

detection

Features• ME + SIM phone book management –

read/write/find, call screening, groups• Software upgradeable• Fixed dialing number

Important AT Command Used To Test And Design

1) ATD to dial a voice call from the modem.

2) AT+IPR to set the baud rate for the modem (here for our application the baud rate is set as 9600)

3) ATA to answer an incoming call.4) AT+CHUP to hang up the initiated call.5) AT+CFUN to set the phone

functionality. Set to 0 to deactivate the modem.

6) AT+CLIP to identify caller number this command is set to 1

7) AT+CLIR for calling line Identification Restriction.

8) AT+CNUM to identify the subscriber number.9) AT+CMGR to read the message at particular

location .The location number is given as index.

10) AT+CMGD to delete the received message11) AT+CMGS to send the message.12) AT+CMGF to change the message format to

PDU or Text mode.13) AT+CMGL to see all the list of messages.14) ATE to enable and disable command echo.

CIRCUIT DIAGRAM

POWER SUPPLY

RTC&EEPROM

RELAY SPDT

THANK THANK YOU..!YOU..!THANK THANK YOU..!YOU..!