After building the NodeMCU based energy monitor with an external 16 bit delta-sigma ADC i.e. the ADS1115 I started looking into solutions which were more accurate and cheaper.
I came across some work by Skye Sweeney with the ADE7763. He had built a prototype on breadboard and wanted to monitor lots of channels so the cost of sensors became prohibitive and he set the project on hold. I am attempting to measure only a single phase and disaggregate the data later by post processing, so a single ADE7763 should serve my purpose.
I set about building a breakout board for the sensor using the reference design in the datasheets and ordered it from Oshpark. This is where I made an error in my rush. I did not check the footprint the element14 library provided against the real chip. So I ended up with a board with TSSOP footprint for a SSOP chip. Should have printed the PCB 1:1 and checked with a real chip. At least the error was found while prototyping and not in production. I bent the package pins a tiny bit to squeeze it in and proceeded to assemble the breakout.
Meanwhile I have tested the sensor using my basic load bulb and CT clamp and voltage and current waveforms are picked up just great. At some point I will build up the courage to create a high voltage / phase accurate measurement rig.