Programmable Energy Meter with Bill Estimation for Reducing Power Bill Gurram Dheeraj Reddy #1 , Gaggalapally Kalyani #2 ,Gande Sai Ganesh #3 , G. Anitha Chowdary #4 #1,2,3 Under Graduate Students, ECE Department, #4 Associate Professor , ECE Department TKR College Of Engineering And Technology, Meerpet, Saroornagar, Hyderabad Abstract— Electricity Energy Meter is a good concept in which you can recharge its balance, like we do in our mobile phones. In this project we are building an automated system by using 8051 microcontroller and GSM module. The main objective of the project is to develop an energy meter that informs the consumer the exact consumption and billing that the load consumes through SMS. For this project, we have taken a standard electronic energy meter. The blinking LED as seen on the front panel is directly proportional to the power consumed. More the power drawn faster becomes the LED blinking pulses. One sensor is placed above such blinking LED to derive the real time units consumed whose output goes to an 8051 microcontroller. Whenever the LED blinks, it then gives an interrupt signal to the microcontroller of the 8051 family and thus the program of the microcontroller counts the pulses and displays the reading on the LCD duly interfaced to the microcontroller for every minute / daily / weekly or monthly as programmed which is sent to the cell phone of the user by an SMS through a GSM modem, which is interfaced to the microcontroller. Keywords— Gsm module, nuvotonn microcontroller, electricity bill, energy meter, electricity INTRODUCTION 1.1 Embedded Systems: An embedded system is a combination of software and hardware to perform a dedicated task. Some of the main devices used in embedded products are microprocessors and micro-controllers. An embedded system is a computer system designed to perform one or more dedicated functions often with real-time computing constraints. It is embedded as a part of a complete device often including hardware and mechanical parts. By contrast ,a general-purpose computer ,such as personal computer (PC), is designed to be flexible and to meet a wide range of end-user needs. Embedded systems control many devices which are in common use today. The architecture of embedded system is as shown in figure. DESCRIPTION OF THE PROJECT The main aim of the Programmable energy meter project is to estimate energy consumed by load with the help of atmega and calculate the cost. Energy meter gives pulses which will be counted and displayed on LCD. These pulses occur depending on energy consumed. GSM to send SMS on amount of energy consumed. 12V Transformer to give power supply to the system. The user needs to make call which will be received and displayed on LCD and stored. The system then comes to setup mode from where the user can switch to start or setting option, setting to set unit cost. Start to know the unit consumed and the cost. The system switches the loads ON/OFF Depending on user commands received through SMS. The system also includes a feature in which user can specify the number of days for which the user wants to retrieve the consumed and the estimated cost for the specified days. In this design, the hardware components that we use are: • GSM MODULE • TRANSFORMER • ULN2003A (RELAY DRIVER) • Relay • ENERGY METER • OPTO COUPLER 2.1 GSM MODULE A GSM modem duly interfaced to the MC through the level shifter IC Max232. The SIM card mounted GSM modem upon receiving digit command by SMS from any cell phone send that data to the MC through serial communication. While the program is executed, the GSM modem receives command ‘STOP’ to develop an output at the MC, the contact point of which are used to disable the ignition switch. The command so sent by the user is based on an intimation received by him through the GSM modem ‘ALERT’ a programmed message only if the input is driven low. The complete operation is displayed over 16×2 LCD display. 2.2 POWER SUPPLY(TRANSFORMER): LPC2148 works on 3.3 V power supply. LM 117 can be used for generating 3.3 V supply. However, basic peripherals like LCD, ULN 2003 (Motor Driver IC) etc. works on 5V. So AC mains supply is converted into 5V using below mentioned circuit and after that LM 117 is used to convert 5V into 3.3V. It is used to step down 230V AC to 9V AC supply and provides isolation between power grids and circuit. SS2.3 RELAY A relay is usually an electromechanical device that is actuated by an electrical current. The current flowing in one circuit causes the opening or closing of another circuit. Relays are like remote-control switches and are used in many applications because of their relative simplicity, long life, and proven high reliability. Relays are used in a wide variety of applications throughout industry, such as in telephone exchanges, digital computers and automation systems. Highly International Journal of Engineering Research & Technology (IJERT) ISSN: 2278-0181 http://www.ijert.org IJERTV8IS120040 (This work is licensed under a Creative Commons Attribution 4.0 International License.) Published by : www.ijert.org Vol. 8 Issue 12, December-2019 22