Tuesday, April 5, 2011

Ashley's Week 10 Report

This Week:  Andrew installed the isolators on the board and we made sure we were still able to read the RMS Voltage.  We reworked the scaling equation so that it outputs an average value of 120V to the terminal when we request a reading.  We also started reading the RMS current register.  When power was applied, we were getting a number around 3,000,000 and when the power was removed, the value was around 23,000.  We have a light bulb socket connected to the circuit and tried some different light bulbs but weren't having much luck with changes in current.  Andrew is putting together a couple more light bulb sockets to hook to our device for further testing. While messing around with the RMS current reading, we decided to add another power supply to so that each part of the board was isolated from the rest, hoping to get better values, but we accidentally fried the power chip so we were unable to continue our work this Sunday.  We began reading through the datasheet about the Active Energy calibration so that we would have an idea of where we needed to start at our next meeting.

(I am not posting code this time because it is essentially the same as my previous post)

Next Week:  We will spend this next week calibrating the active energy readings and possibly look at the apparent energy if time allows.

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