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# alternative methods for create own energy meter

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#### visva

##### Member level 3
i am in working create own energy meter. i have searched ADE775x,ADE776x series. but it is having some difficulty to do this(transformer, shunt resistor..etc.,). so any one help me. Is there any alternative methods(IC, Circuts..etc.,) for measuring energy for single phase. here i want display this energy meter value in the LCD by using micro controller (89s52).

#### chuckey

To get the accurate figure of your power consumption you need to get the current and the voltage, multiply them, then multiply them with the cosine of the angle between them i.e. V A Cos phi. If you consider that the current consumption is due mainly due to resistive loads (Electric ovens, electric heating,electric showers), then the cos Phi term can be neglected. If however you do not have these big power users and have a lot of transformer driven items, then you will get a figure HIGHER then the true value. Likewise if your mains voltage is constant, you do not have to consider this term, however in most countries the mains voltage is held to only +- 10%. So a crude measure would be to measure the current then display (times the mains voltage) as kW i.e. for a nominal 230V mains supply, if the supply current was 8.2A, then the display would read (8.2 X 230/1000) = 1.88 KW.
Frank

#### visva

##### Member level 3
i know how calculate energy. but i need to know what are circuits or IC (components) for calculating energy.

visva

### visva

Points: 2

#### Fe(II)man

##### Member level 1
okay so you're looking for ways to detect current and voltage if I understand your post correctly.

for voltage a simple instrumentation amplifier configured as a difference amplifier, connected in parallel to your load, would be perfect. Just mess around with the pot to obtain the correct accuracy.

with regard to current sensing, go for the ACS714, a hall effect sensor, available on break out board, easy integration into your design, gives an output voltage proportional to you load current. Have a look at the datasheet.

pass the voltage and current values to and onboard ADC on any micro eg. Atmega32 on arduino and check out the site below. it explains code and steps to take to get your power consumption values.

https://arduinotronics.blogspot.com/2012/04/monitoring-power-consumption-with.html

this should give you a good start.

good luck

visva

### visva

Points: 2

#### visva

##### Member level 3
I have understood some what. Give me some any other ideas also if you are know about it.

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