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Well, this time it gave me: kp: 102.89 ki: 0.06 kd: 0.00 I can't even begin to guess what kind of overshoot that's going to bring on. I think 102.89 is the local Spanish radio station.

Well, I am making another attempt at it today. I will let everyone know if I come up with anything useful. I am really starting to lose my faith in the usefulness of PID for this project. I am starting to think I might just be better off writing my own control script from scratch.

You mean a direct swap? Chip for chip? No, not at all. You could use the Attiny to read a pot, and set a value to drive a transistor for the fan, though. Keep in mind, my PWM here or using it to drive a stirplate is a gross underuse of the ATtiny. I've used them so far to run the PID...

Correct. Pm sent on price.

They certainly are interesting! I streaked four plates tonight after everyone went to bed and the dog settled down. 2 of the WLP004, and 2 of the PACMAN I actually intend to use. I couldn't take pics while I was streaking plates. That part is a little tedious & goes very quickly. I...

I've got a couple of the PWM's I made in this thread. If you're interested, PM me.

Yup. Purple plate with purple dots on it. I should have taken pics! The dye was some I found in the kitchen. I think it was in a frosting kit for cupcakes. For CO2 regulator adjustment.

In the otherwise-useless tray on the fridge door. I've done the food coloring thing. The yeast took the coloring up with the water, I had purple yeast. That weirded me out, never did it again! I want to get a scope & hemocytometer, I've read the tutorials & it seems easy enough. I just haven't...

Did you ever get access to another mill?

I rent. And I'm not installing a softener one for the owner! I have been considering the countertop distiller, though. For yeast, and to make long-lasting Star-San.

I joined when Walter (not White.. OUR Walter) suggested it right when Ken opened up. I joined, maintained membership for a couple years, but never made it to a meeting. I "always keep meaning to" go, but... Regarding the more famous Walter.... I SWEAR that I was thinking to myself that I...

Done. I bag them, flip them over, and leave them sit for several days to ensure that I'm starting with a clean plate, and to allow some excess water evaporate. You can tell our water here is hard as a rock. There's an impressive layer of powder on all of these. I've tried a little vinegar...

I have not been out in the garage in forever. I think those pics from June were the last day I was out there. Sorry I'm not more help. I'm hoping to get back out there again soon and, if I have any success with the autotuner, I'll post it here.

I'm finally getting around to starting on this yeast. I've got some pints & quarts of wort canned & ready to go, but no small volumes. So, tonight, I'm making my plates & step ups. Here's how I make plates. I hate mixing & pouring media. There's always a bunch left over (wasted) and I...

I'll bet doubling does it. I successful with 4-5% agar, by weight. That seems to be my "balance point. ETA: you can probably just add the agar, stir, and reprocess without having to mix up a whole new batch.

I put this suspension of WLP004 up on April 12, 2010. Anyone want to take bets on viability?

That's been my solution for pretty much everything as well, patience pays. Although, now that I'm soldering SMD components on home-etched boards, Digikey is a lot more competitive.

Which is pretty much exactly what I did here, except my power supply is off of the board, and I was programming the chip by swapping it in and out of the Arduino. I've learned some since then. If I were doing it again today, I'd use the TQFP instead, put a LM1117 & caps on the board, add a 6...

Possibly of interest to the OP: https://www.homebrewtalk.com/f235/yet-another-option-pid-control-350979/#post4372987

I think I want to teach myself to code AVR's outside of the Arduino environment. So far, I can read a button and blink and LED (deja vu). While looking at the Atmel site for some tutorials or beginner projects to get myself started, I came across this: AVR221: Discrete PID controller on...