Literature Review

After doing a research, there have many information and project that have connected to the purposed project. In a present day there already change from the analog energy meter to a digital energy meter in a certain place and the other places still have using the analog energy meter. Now, according to Md. Mejbaul Haque project that I have research. He creates a single phase digital prepaid energy meter based on two microcontrollers and a single phase energy meter IC. This digital prepaid energy meter does not have any rotating parts. The energy consumption is calculated using the output pulses of the energy meter chip and the internal counter of microcontroller (ATmega32). A microcontroller (ATtiny13) is used as a smart card and the numbers of units recharged by the consumers are written in it. A relay system has been used which either isolates or establishes the connection between the electrical load and energy meter through the supply mains depending upon the units present in the smart card. Energy consumption (kWh), maximum demand (kW), total unit recharged (kWh) and rest of the units (kWh) are stored in the ATmega32 to ensure the accurate measurement even in the event of an electrical power outage that can be easily read from a 20×4 LCD. As soon as the supply is restored, energy meter restarts with the stored values. A single phase prepaid energy meter prototype has been implemented to provide measurement up to 40A load current and 230V line to neutral voltage.Necessary program for microcontrollers are written in c-language and compiled by Win-AVR libc compiler.

            For my opinion, using a card reader is hard for us to reload the prepaid card if the card is empty. Need to make sure the card has credit, if we want use an electrical. For my project, the most important contributions of other related projects/findings for my project is to make sure the consumer know how much they use the energy, besides this project is already convert from energy usage (kWh) to Ringgit Malaysia (RM),so the consumer will know how much for electric bill in a month that need to pay. Other than that, this project have saving system, so they set the amount if they want to budget in an electric bill by set how much they want to pay into the system.