This document presents a project on a prepaid energy meter using GSM. It consists of an introduction, block diagram, descriptions of the microcontroller, LCD display, GSM module, relays, and other components. The system uses an AT89S52 microcontroller to control relays connecting the load to the main power supply based on commands from an operator via GSM. It has advantages like accuracy, tamper proofing, and better customer service. Future enhancements could include a printer, remote recharging, and balance checking. The conclusion is that the project works satisfactorily in the lab and minor modifications could make it suitable for field use.

1. SWAMI RAMANANDA TIRTHA
INSTITUTE OF SCIENCE
&TECHNOLOGY
Department of EEE

2. PRESENTATION ON
PREPAID ENERGY METER USING
GSM
By
P.Uday kumar reddy
M.Swetha
P.Renuka
P.Santosh
(10141A0281)
(10141A0280)
(10141A0255)
(10141A0261)
UNDER THE ESTEEMED GUIDANCE OF
Mr.JOHN WESLEY
M.tech
Asst.professor

3. ABSTRACT
1 Provide the adequate supply to customers and
collect the fare effectively.
2 The imperfection in traditional billing
systems.
3 To overcome this imperfections this project is
designed.
4 The application is mainly based on
microcontroller.

4. INTRODUCTION
1.Automatic meter reading (AMR) system.
2. Growth of metering instrument technology.
3. Prepayment metering

5. BLOCK DIAGRAM
1-PH
230V
230/9
T/F
AC TO
DC
CONVE
RTER
5V
16X2 LCD DISPLAY
MICRO
CONTROLLER
(AT89S52)
RELAY
GSM
ENERGY METER
LOAD

6. MICROCONTROLLER
•In this system AT89S52
microcontroller is used.
•256 bytes of internal
memory.
•4.0v to 5.5v operating
range.
•32 programmable I/O
lines.
•AT89S52 is a lowpower, high performance
8-bit microcontroller.

7. • . Controller receives the commands from GSM modem and
activates relays as per the command.
• And send the feedback SMS to operator through GSM
modem.
• Controller connects the load to the main supply by operating
relays contacts.

8. Liquid Cristal Display
•Interface with
either 4-bit or 8-bit
microprocessor.
•16x2 display
•Which displays the
amount of power
consumed

9. GSM
• GSM means Global
system for Mobile
communication.
• GSM transfer the
instruction to main circuit
from operator and vice
versa.
• The frequency range
specified for GSM is 1,850
to 1,990 MHz

10. RELAYS
• Relay is an electrical switch that opens and closes under the
control of another electrical circuit.
• The phase of main supply is connected to relays.
• OFF condition relay contacts are in open, under ON condition
contacts are in closed position.
• Means it connects the phase to the load in ON state only .

11. •Input supply
required to operate
relay is 8-12v .
•The output phase
connected to relay
range is 7 amp
250v.
•It gives the sound
while contacts are
closing and
opening.

12. AUXILARY COMPONENTS
• Led lights are used to know the circuit status ,means power in
the circuit is present or not.
• Reset switch is used for restart the controller tasks from the
beginning when ever it is struck.
• Crystal oscillator is used to generate the proper voltage to
relays in controller.(means generating clock pulses).

13. ADVANTAGES
• High accuracy over a wide current dynamic
range.
• Tamper proofing.
• Reduce financial risks.
• Better customer service.
• Improve operational efficiencies.

14. FUTURE SCOPE
• A mini printer can be interfaced to get a
printed bill or details of billing.
• Remote recharging can be implemented
through telephone line or wireless network.
• Software can be modified to view the balance
on request.

15. CONCLUSION
This project is performing satisfactory function
in laboratory condition. The device designed is
used in conjunction with an Induction Energy
meter. With minor modification in the
software and hardware this system can be
used for field application.

16. THANK YOU

17. QUERIES?