Idea of measuring RMS voltage and current using MCU ADC

[mailtoarup]

Posted on January 31, 2006 at 00:56

Idea of measuring RMS voltage and current using MCU ADC

[mailtoarup]

Posted on December 17, 2005 at 02:25

Dear sir,

I have a project which needs to measure Supply Voltage and Current.I want to measure them using only MCu adc (ST7 with 10 bit ADC and 6 analog i/p channel).Could anybody help me ??I want a tested circuit and also want the idea/steps to develope this firmware to measure voltage and current rms value.I believe supply input voltage is always RMS if it is not mentioned.so i don't have to take voltage sample ,square ,take average and take root of it.Or do I??Pls correct me if i am wrong.

pls note the max voltage and current for the system to measure are 260 V and 30 A respectively.And I know how to configure the adc for this particular MCU

Thanks,

arup

[laurent239955_stm1]

Posted on December 23, 2005 at 06:44

Hi,

There will be soon an Application Note on this subject published on our web site.

Best regards

Laurent

[mailtoarup]

Posted on December 23, 2005 at 08:03

thanks for the info.what is expected time...could it be possible for you to tell about that.

regds,

arup

[mailtoarup]

Posted on January 31, 2006 at 00:56

''Hi,

There will be soon an Application Note on this subject published on our web site.

Best regards

Laurent ''

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Dear Mr Laurent,

Could you be able to give exact time frame ,atleast approximately, for this particular App Note to be available on this website.

Thanks,

Arup