PowerMeter electronics

I milled some circuit boards at work and smuggled in a few of my own designs as well. A few boards which are ULN2003A driver cards, a couple of ethernet module boards for the openASC box. I also designed a few peak-hold circuits which I plan to test with the PowerMeters. I have a problem that the new 16-bit A/D converter is too slow so the time between the FWD and REF sample is too long and the SWR calculation does not get accurate. And since the sampling time is too slow I can not do any proper filter either except a very slow one. So I am going to try using an LF398 chip so that I can hold both channels for enough time, that I can get a couple of samples and do the calculations. I guess we will see tomorrow if it works or not 🙂

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