A number of apartments nowadays are still implementing a master – metered

form of billing in which the allocation of the payment is divided by the number of

apartment units. With this kind of set up, all consumers pay an exactly the same amount

regardless of consumer’s income, capability to pay and level of consumption. Thus, the

consumers are not aware of their daily consumption regarding the amount of electricity

usage and its associated equivalent monetary cost. This may probably result over

consumption of electricity leading to unpaid bills and debts. An added burden is the cost

of disconnections and reconnections which, basically, is high.

KEY

BUTTON

SENSOR

[ROOM3]

SENSOR

[ROOM1]

SENSOR

[ROOM2]

PIC16F877A

PIC16F84A

LCD

RELAY

[ROOM1]

PIC16F84ARELAY

[ROOM2]

PIC16F84A RELAY

[ROOM3]

OutputProcessInput

COIN SLOT

Pic to picsimulation

Keypad

Electricity Level Indicator

Pic to picsimulation

Main lineconnector

ROOM 1

Breaker

ROOM 2

ROOM 3

Relay Electric

Meter

Relay Electric

Meter

RelayElectric

Meter

Switch B

Switch B

Switch B

Main

Line

Balance

Start

Room Numbers

OK Cancel /Change

COIN SLOT

User Interface

• The developed coin slot prepayment system for household electricity can be a good

limiter for electricity usage because you can’t have electricity if you will not pay for it

first.

• The developed coin slot prepayment system for household electricity can give the

end user an accurate amount of electricity depending on the equivalent amount value

of money that is fed by the end user to the machine.

• The developed coin slot prepayment system for household electricity will help it’s

tenant in paying the electricity bills on time, since electricity is paid off before it is

used and the tenant can withdraw the money anytime from the machine.

• The developed coin slot prepayment system for household electricity will

improve if the future researcher will used Programmable Logic Controller

(PLC) in exchange of using Peripheral Interface Controller (PIC).

• For further research improvement, the coin slot prepayment system for

household electricity may be utilized for a larger number of rooms.

• The proponents recommend that a portable digital type of electric meter will

be used in counting the electricity consumption.