This document describes a GSM-based wireless electricity billing system with time-of-day metering. The key components include an optical interface to read energy meter pulses, a microcontroller to calculate consumption and bills, an LCD display, real-time clock, and GSM modem for wireless communication. The system aims to automate electricity billing and provide benefits like more accurate billing, real-time consumption data, and customized rates compared to traditional manual billing processes. Block diagrams and PCB layouts are shown, along with a components list and estimated project schedule.

1. GSM Based Wireless Electricity Billing
With TOD Metering
GROUP5
Members:
ABHIJITH K K - 02
AFSAL P V - 04
ATHUL M G - 18
HRISHIKESH P - 26

2. current system
• Done by human operator from houses to houses and building to
building.
• Requires huge number of labor operators.
• Long working hour to achieve complete area data reading and billing.
• Human operator billing are prone to reading error.
• Restricted and slow down by bad weather condition.

3. GSM BASED WIRELESS ELECTRICITY BILLING
WITH TOD METERING
• Automatic consumption calculation
• Separate billing for TOD(time of day)
• Optical interface with energy meter
• GSM mobile bill facility
• Real time display for unit and bill

4. Advantages
a) Consumer Side Advantages
• Precise consumption information
• Clear and accurate billing
• Better and faster customer service
• Eliminate billing delay

5. b) Electric Company Side Advantages
• Eliminate billing delay
• Save time
• Save money
• Save maintenance
• Smart automated processes instead of manual work
• Accurate information from the network load to optimise
maintenance and investments.
• Customized rates and billing dates.

6. MAIN PARTS
• Photo transistor for optical interface
• PIC 16F877A as microcontroller unit
• 16*2 character LCD Screen
• DS1307 as Real Time Clock(RTC)
• External keys for data entry
• RS232 interface with Modem
• Bidirectional GSM communication

7. BLOCK DIAGRAM

8. OPTICAL INTERFACE
• Photo transistor L14F
• Communicate between energy meter and MCU

9. KEY BOARD
• For Real Time data entry
• Micro switches are used
• Interfaced to port A

10. Real time cLock
• DS1307
• 3v button cell

11. Micro controller
• PIC 16F877A
• Read the pulses from optical interface
• Calculate the unit and bill amount
• Control the function of LCD
• Read/write data from RTC
• Communicate with GSM modem

12. GSM Modem
• Communicate GSM network and micro controller
• Interfaced through RS232 communication
• Bidirectional data transfer

13. Power supply:
• Convert AC mains to DC 5v level
• Step down transformer (center tapped)
• Center tapped rectifier
• Capacitor filter
• Regulator LM7805

14. PCB DESIGN
• COMPONENT SIDE USING EXPRESS PCB SOFTWARE
• SOLDER SIDE USING EXPRESS SCH

15. CIRCUIT DIAGRAM

16. PCB LAYOUT: COMPONENT SIDE

17. PCB LAYOUT: SOLDER SIDE

18. ASSEMBLING : COMPONENT SIDE

19. ASSEMBLING : SOLDER SIDE

20. ACTUAL COSTSL NO: ITEMS QUANTITY PRICE PER UNIT AMOUNT
1 Micro switch 4 80 320
2 Energy meter 1 2900 2900
3 Photo transistor 1 54 54
4 Microcontroller 1 163 163
5 16*2 LCD Screen 1 200 200
6 Real time clock 1 40 40
7 GSM module 1 2100 2100
8 Serial interface 1 232 232
9 Transformer 1 80 80
10 Capacitor 2200uF 1 15 15
11 Capacitor .1uF 2 1 2
12 Regulator 1 105 105
13 Resister 14 250
Total amount:6460

21. SCHEDULE
AUG SEP OCT
1 2 3 4 1 2 3 4 1 2 3 4
Design
Components
purchase
Assembling
Programming
Test
submission

22. THANKS