how can i calculate the AC power used by any appliance like fan with ATMega32

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vishaldevnale

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I am doing my BE Engg project.

Name: "HOME AUTOMATION & POWER MANAGEMENT"

I want calculate the power used by each appliance in ON state. so that we can monitor power used in home. and I can draw it in MATLAB.

I am using ATMega32 MCU in my project to switch ON/OFF each appliance.

I think i have to calculate the current consumption by appliance.
but i don't know how to do it.

if any one tried this please help.

Thank you.
 

@tpetar
I think Hall sensors are used to only measure the DC current,not AC current. ????????//
 

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