EEPROM BASED SMART PREPAID ENERGY METER WITH AUTOCUT OFF ON NO
BALANCE
Technical Specifications:
Title of the project : Embedded Prepaid Energy Meter using 89S52
Microcontroller
Domain : Embedded
Systems Design
Software : Embedded C, Keil, Proload
Microcontroller : AT89S52
Power Supply : +5V,
500mA Regulated Power Supply
Display : 16x2
Liquid Crystal Display
Recharge Card : EEPROM based card
Storage Unit : 24C04 EEPROM : 1
ABSTRACT:
Due to the drastic changes in technology
in the last decade, so many advancements were introduced in electricity
departments. The electricity bill can be paid now through E-Seva centers, ATMs,
Net-banking and even through mobile phones. But prepaid electricity is a unique
and new concept which saves lot of time and a power for electricity department
and consumer. In this system the user has to purchase an EEPROM based recharge
card and it should be inserted in the slot provided on prepaid energy meter
kit.
After inserting the recharge
card into the system, the user should press RECHARGE key to start recharge.
Then the system will be loaded with specific units as per the recharge card
value. A 16X2 LCD is provided to read units available. Here the system is connected with loads.
If the load increases in the system, current also increases and is calculated
by energy meter which counts the analog data and converts into digital which is
sensed by controller and its corresponding count is also calculated. Whenever
the count value reaches one thousand, 1unit is decremented from EEPROM and
these values are displayed on LCD.
An EEPROM is provided on
the board to store the updated recharge units and energy meter pulse count. At every instant the count value and
units values are stored in EEPROM so that the data will not be lost even in power failure cases. When balance of two
units is reached a continuous beep is given by the system. When the recharged units
become zero on power consumption, the system shutdowns all the loads.
To use the system again the
user has to reload the units by recharging the system.
The user has to place this recharge
card in slot provided to recharge. After pressing the recharge key, the system
will be loaded with the units corresponding to that recharge value. After
successful recharge, the load automatically gets ON. This system uses 5V
regulated power supply for the microcontroller.
Hence this
project provides a best solution for the users to know how much amount of power
is consumed in their day- to- day life and also the amount of power consumed is
also under the user control.
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