Made some progress today getting a pair of Adafruit RTD probes working with the AD7793 card today. There’s still some issues to sort out, but at least the numbers are looking more realistic. I still don’t understand the proper formula to computer the RTD resistance from the ADC value and haven’t found any clear answers in the documentation. Hope to get this sorted out soon.
Made some progress with the dual AD7793 temperature measurement ADC I/O card this weekend. Not sure if the data is correct yet, but it appears to be communicating with the ADC parts and reading the sample data.
The comments below were posted by Robert Adsett on the TI E2E board. With his permission I’ve posted these below to keep in mind for future hardware revisions.
Love your direction of accepting DC Power. Suspect that extending to 12-60VDC eases such DC Input
There’s a few reasons for the range I selected. Not that others couldn’t be used
Thanks for visiting my project page! I’ll be adding content slowly as my project develops over time. I look forward to hearing ideas from others on possible applications and uses for the PMX42. Initially I started this project with the intent of moving into some sort of niche in the industrial controls market. But, it soon became clear that the module nucleus could fit a much wider range of applications and possibilities.