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It just occurred to me that I never actually shared this part of the code: FWIW, my settings are: 102.89, 0.5, 0.0. Also, I think some of my changes have made the constrain line irrelevant, but it's also not hurting anything so I didn't take it out. if (mode ==0) { //compute...

For the OP, My system is pretty much what you're describing. I'm using a single element (5500) mounted in a keg, and a 10 gallon orange cooler. I just mash with the full volume of water. Check out the "I love no sparge brewing" thread by started by Sacc. I'm using an Arduino for a...

I did, what I felt, was a fairly exhaustive search on this very topic. Ultimately, I went with Iron Box on eBay. I ended up getting a 50 foot long 10/4 cord, with twist lock ends, for about $75.

What have you got going on there? Stirplate, built into the floor of tiny, tiny fridge for temp control, and forced filtered fresh air into the headspace?

This is no longer on the site. Does anyone have an alternate source for this?

How are you going to handle wireless for the sensors?

Correct.

Here you go, the good and the bad alike:

The WLP004 has yeast, it is unfortunately outnumbered by and covered with some translucent/clear nastiness. The Pacman looks clean & ready to start building up! The water-suspension technique is valid, no doubt. My sterile technique is a little wanting (or, at least was on April 12, 2010)...

Okay..... now I quit. Here's the last 5 minutes of a small temp change, zoomed way in. You can easily see every 0.11 temp step. And the following 5 minutes: And, finally, a large temp ramp from full throttle. You can see where my sketch hands over control from my line of code to the PID...

I try not to, just so the only sediment in my flask is actual yeast. I'll second that. I've never followed closely enough to see if those are the same people that respond with "This has been discussed many times, use the search function".

Interesting! I thought that was theoretically impossible.

Oh, and the other reason I had against just leaving it was that, not only was it off by 0.3, but it was making no effort to correct that error. As fasttalker was saying, I'm guessing that error may be higher in February than in August. Or on a breezy day. Or, worse, that error may accrue...

No... just.. no. It smelled like the proverbial hobo's crotch. I gagged & tightened up a few times. Seriously. I just went to dump the keg and this thing kinda oozed and plopped out into the sink, like placenta from a decayed zombie cow or something. I thought, no one is going to believe...

You know, I guess we're also not taking into account WHICH formula the autotune library is written for, either. I'm guessing that this uses the ZN formula, which, by design, *does* overshoot. Thanks! Which is exactly what I'm going to try next. I intend the define a "course" band of...

About three years ago, I had an infected batch of beer. Instead of cleaning it up, I was disgusted and I just set the corny in the garage out of the way. It's three years later now. And, I just came across that Corny keg. So today, I'm cleaning it up again this fell out of it. It smells more...

I'm at it again this morning. That's a 15 minute window. I'm still overshooting 0.5, and then hovering under 0.2-0.3. I'm going to try to work that out, and keep you posted.

And I think I'm finally joining you on that.

Instead of sleeping, or doing the dishes or whatever I *should* be doing, I went back out to the garage. I wrote a crude, quick few lines of code. Here's the result: I had the kettle at 132, then turned on Processing to run the PID front end so I could capture this 20 degree ramp up for you...

Yeah, I'm NOT QUITE ready to give on PID without overshoot. I've got an Auber PID & RTD that I can use with this very system that does precisely that. I just don't seem to have the skills yet to duplicate it with Arduino. I am ready, however, to give up on the autotune library. Today was my...