Hardware Diagram

Hardware Diagram

From the Diagram  above  we can see live(red), neutral(black) , and earth(green) is connected the single phase energy meter. The analog energy meter is to show the actual reading of the energy usage. The output of energy meter will go to the distribution board where in this distribution board have a protective device such as Main Switch, Residual Current Circuit Breaker, and Miniature Circuit Breaker (MCB). The protective device is to protected the circuit from having short circuit, overload current, earth fault and etc that can damage the circuit. There have three output will go out from distribution board. For the first output will go to the Step down transformer where in this situation. The transformers will step down the voltage from 240V AC to 12V AC. The step down transformer is need because the circuit cannot handle 240VAC voltage for the power supply circuit. When step down voltage is 12V AC it still cannot be a power supply for the circuit because it is still in AC voltage while the power supply circuit need is DC voltage. So there have rectifier, to convert AC to DC voltage. Second output is going to the load where this port is for the load such as lamp, and other electrical component. And the third output will go to the circuit where in this circuit it will read and give the reading and display to the LCD. The LCD will display, energy usage (kWh) and the electric bill (RM).