Monthly Archives: February 2012

NIOS2 FPGA work

Posted on February 25, 2012 by Skye Sweeney

At work I got assigned to write a very simple control system for a device we are making a prototype of. For various reasons, the designers choice to use an FPGA with a soft-core processor. What this means is that … Continue reading →

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Swamped at work

Posted on February 22, 2012 by Skye Sweeney

Having to take a small break from the fun stuff as I am swapped at work. Hope to be back in a week.

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Power meter design-2

Posted on February 15, 2012 by Skye Sweeney

I think I decided that the easiest and simplest solution to the chip select problem is to use a small PIC processor to receive a serial data block with the address that the master processor wants to talk to. If … Continue reading →

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Power Monitor design issue

Posted on February 13, 2012 by Skye Sweeney

I still have a few minor issues to work out with the ADE7763, but now I have my eyes back to the system design. I need to figure out how to build 30+ of the sensors and connect them up … Continue reading →

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ADE7763 Part-11 (First Data Collection)

Posted on February 10, 2012 by Skye Sweeney

Tonight I moved the current sensor from my test load (150W light bulb) to a real circuit in my main distribution box. That circuit is currently pulling nearly 500W at 121Vrms. It is logging data to a CSV file. It … Continue reading →

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ADE 7763 Part-10 (Not much)

Posted on February 10, 2012 by Skye Sweeney

I found the cause of my power switching from positive to negative. I would scope the current and voltage inputs one day and they would be in phase. The next day or even later that day they would be 180 … Continue reading →

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ADE7763 Part-9 (My Problem)

Posted on February 8, 2012 by Skye Sweeney

As I kind of suspected, Analog got back to me and informed me that the ADE7763 was a very mature product and that the reversal of IRMS and VRMS was never reported. Now unless NOBODY has ever tried to read … Continue reading →

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ADE7763 Part-8 (Bad datasheet?)

Posted on February 6, 2012 by Skye Sweeney

I last left with a puzzle on my mind. The VRMS and IRMS registered seemed to be reversed. Changing the load did not vary the IRMS register by rather the VRMS. I figured I had screwed something up in the … Continue reading →

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ADE7763 Part-7 (Mystery of the swapped VI)

Posted on February 6, 2012 by Skye Sweeney

In my last port I alluded to the mysterious swapping of the voltage and current channel. When I read the Vrms and Irms channels under various loads, it is the voltage channel that changes significantly and not the current. I … Continue reading →

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ADE7763 Part-7 (peeling back the onion)

Posted on February 4, 2012 by Skye Sweeney

My ADE7763 is connected to an Arduino and I am now working on the interface code to aid in system testing. I sent several hours today with my mixed signal scope (2 channels of analog and 16 digital) debugging. What … Continue reading →

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