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how to integrate a microcontroller with either a CT or a power meter to read values for automation Answered

Working with either an LPC 2129 or an 8051 microcontroller, is there a way to make get inputs from either a CT or power meter? 

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steveastrouk (author)2015-01-23

Yes, of course there is. You need an A/D converter and an interface.

Steve

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knillzbaba (author)steveastrouk2015-01-28

hello steve, what type of interface? and the A/D converter connects the CT to the microcontroller?

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steveastrouk (author)knillzbaba2015-01-28

Do you want a real CT or a Hall sensor ? for amateur stuff, I'd stick with Hall.

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knillzbaba (author)steveastrouk2015-02-09

Yea, hall. How do i go about that?

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steveastrouk (author)knillzbaba2015-02-09

Pick a sensor.

You get AC off the sensor which needs to be rectified. Look for a "perfect rectifier" circuit, using an op-amp. Take THAT into an RC filter, for mean measurements, or straight into the ADC for clever stuff, where you integrate it numerically.

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knillzbaba (author)steveastrouk2015-02-09

Yea, hall. How do i go about that?

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