I'm controlling temps in my fermentation chamber with an old linux 'puter and some extra parts. Now that I'm working my way into all grain, I was thinking about expanding this system to control the mashing process temps in a HERMS system.
A long time ago in a galaxy far far away, I did some PID stuff in C. I was dusting off that code last night in order to port to PHP... and I'm sure this will label me as a heretic, but.... it occurs to me that PID is probably overkill for the project. A large tub of HLT water (5+ gallons) being used to passively heat the mash (MLT) can't possibly respond fast enough to warrant a PID algo. Seems to me a simple hysteresis would work just fine for this... Eh?
A long time ago in a galaxy far far away, I did some PID stuff in C. I was dusting off that code last night in order to port to PHP... and I'm sure this will label me as a heretic, but.... it occurs to me that PID is probably overkill for the project. A large tub of HLT water (5+ gallons) being used to passively heat the mash (MLT) can't possibly respond fast enough to warrant a PID algo. Seems to me a simple hysteresis would work just fine for this... Eh?