/diy/ - Do It Yourself

>>1421929
Anyway, I figure it's some sort of grounding issue that's causing these erroneous readings. But that's where the truck stops, I'm not sure how to go about solving this issue.
This was all done on a perf board since I know thermocouples can be a little sensitive to the extra metal in breadboards.
I should also mention that I did have this working perfectly fine at one point. I left it alone for about a week, and when I came back to it (didn't modify it in any way), it wasn't reading temperatures properly.
It's just frustrating because this should in theory be the easy way out of messing with OP Amps.