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Search: Posts Made By: tob77
Forum: General Beer Discussion 07-15-2014, 04:26 AM
Replies: 596
Views: 10,388
Posted By tob77
Thank you HopHouse!

Thank you HopHouse!
Forum: BIAB Brewing 06-11-2014, 06:55 AM
Replies: 11
Views: 861
Posted By tob77
FWIW I just set the cooling shrinkage to 0% in my...

FWIW I just set the cooling shrinkage to 0% in my equipment profile. I think that the 4% cooling shrinkage is only useful if you measure your volume while boiling with a sight glass, kettle...
Forum: Automated Brewing Forum 03-10-2014, 07:34 AM
Replies: 72
Views: 18,111
Posted By tob77
I hate to be a naysayer, and I think bubblers are...

I hate to be a naysayer, and I think bubblers are great for volume measurements. However, I think that you should do some preliminary calcs before you go too far down this road. I don't think that...
Forum: Automated Brewing Forum 01-27-2014, 06:12 PM
Replies: 10
Views: 1,040
Posted By tob77
I am not familiar with the Click PLCs but the...

I am not familiar with the Click PLCs but the ladder logic / relay logic should look something like this.
Forum: Automated Brewing Forum 01-22-2014, 07:24 AM
Replies: 29
Views: 8,599
Posted By tob77
It looks like mouser.com has them in stock. They...

It looks like mouser.com has them in stock. They have the right part number but the description isn't quite right. Alternatively, you could try and get a sample directly from maximintegrated.com. ...
Forum: Automated Brewing Forum 01-21-2014, 07:48 AM
Replies: 29
Views: 8,599
Posted By tob77
I looked a little further into flame...

I looked a little further into flame rectification, and it looks like it would be fairly difficult to implement. About 30VAC is placed on the flame sensor and then DC microamps are measured off of...
Forum: Automated Brewing Forum 01-09-2014, 05:42 AM
Replies: 29
Views: 8,599
Posted By tob77
I looked up thermopiles and it looks like they...

I looked up thermopiles and it looks like they consist of multiple thermocouples configured to produce a greater voltage than a single thermocouple. I think that they would be the best choice if we...
Forum: Automated Brewing Forum 01-09-2014, 05:29 AM
Replies: 29
Views: 8,599
Posted By tob77
I think that the cheapest and easiest flame...

I think that the cheapest and easiest flame sensing idea would be the 1-wire + thermocouple idea. My only reservation is whether or not they can withstand the prolonged exposure to the burner. I've...
Forum: Automated Brewing Forum 01-08-2014, 05:37 PM
Replies: 29
Views: 8,599
Posted By tob77
Where is the thermopile mounted on your...

Where is the thermopile mounted on your brinkmann? Is it directly in the flame?
Forum: Automated Brewing Forum 01-08-2014, 05:56 AM
Replies: 29
Views: 8,599
Posted By tob77
I like this idea, I might go the hot surface...

I like this idea, I might go the hot surface ignitor if I was to do it again. The EMI mostly causes issues with low current signal lines. Like I said before, I have only seen issues on my LCD and...
Forum: Automated Brewing Forum 01-07-2014, 07:14 AM
Replies: 29
Views: 8,599
Posted By tob77
The spark module can either be energized...

The spark module can either be energized automatically or by a manual push button on my control panel. It gets energized for about 3 seconds every time the program turns the burner on. The burner...
Forum: Automated Brewing Forum 01-05-2014, 07:00 PM
Replies: 29
Views: 8,599
Posted By tob77
The only problem with spark modules is that they...

The only problem with spark modules is that they produce a lot of electromagnetic interference. I have spent quite a bit of time trying to shield my system from the problems it introduces. Try to...
Forum: Automated Brewing Forum 01-04-2014, 07:22 AM
Replies: 29
Views: 8,599
Posted By tob77
I am using a spark module from a gas range for...

I am using a spark module from a gas range for ignition. The spark module is energized by a relay that is linked to the rpi gpio. I do not have a thermocouple on the burner right now so the rpi has...
Forum: BIAB Brewing 01-02-2014, 06:45 PM
Replies: 18
Views: 4,608
Posted By tob77
I finally got around to posting some more details...

I finally got around to posting some more details and source code for my setup in the automated brewing forum.
http://www.homebrewtalk.com/f235/raspberry-pi-brew-controller-451059/
Forum: Automated Brewing Forum 01-02-2014, 06:15 PM
Replies: 29
Views: 8,599
Posted By tob77
Raspberry Pi Brew Controller

I have recently retrofitted the controls of my old rusty brew rig that I put together back in 2002. I am now using a Raspberry Pi to control my propane BIAB rig. The gpio on the rpi is used to...
Forum: Automated Brewing Forum 12-31-2013, 07:58 AM
Replies: 39
Views: 5,888
Posted By tob77
I wrote one based on the equation that I found in...

I wrote one based on the equation that I found in Rockwell Software's ControlLogix PLC documentation. It uses the velocity PID equation with independent gains. ...
Forum: DIY Projects 11-14-2013, 05:30 AM
Replies: 24
Views: 3,869
Posted By tob77
I have the cheap tan pump and haven't had any...

I have the cheap tan pump and haven't had any problems so far, but others have reported some issues. Please see this thread:http://www.homebrewtalk.com/f11/cheap-compact-wort-pump-375904/
Forum: BIAB Brewing 11-11-2013, 05:07 AM
Replies: 18
Views: 4,608
Posted By tob77
I used InstaMorph which is a generic form of...

I used InstaMorph which is a generic form of shapelok that I found on Amazon. Thanks again for the idea and inspiration:mug:

I think that a well mixed mash is very important any time that you are...
Forum: BIAB Brewing 11-10-2013, 04:28 AM
Replies: 18
Views: 4,608
Posted By tob77
Yes, I'm using a PID algorithm to adjust the...

Yes, I'm using a PID algorithm to adjust the burner in order to maintain the temperature.


The temperature control works the best if the burner is on during the whole mash, but I have to leave...
Forum: BIAB Brewing 11-09-2013, 05:47 AM
Replies: 18
Views: 4,608
Posted By tob77
All of the control programming is in python and...

All of the control programming is in python and the interface is developed using webpy and html5. I designed it to work with my tablet, phone or laptop. The temperature probe is a DS18B20 digital...
Forum: BIAB Brewing 11-08-2013, 04:45 AM
Replies: 18
Views: 4,608
Posted By tob77
Here is a brief summary of my setup that I only...

Here is a brief summary of my setup that I only recently got working: I am recirculating with one of the cheap tan Chinese pumps. The pump sucks through the center of a false bottom in my keggle so...
Forum: BIAB Brewing 11-04-2013, 04:29 PM
Replies: 20
Views: 1,209
Posted By tob77
I am using this...

I am using this one:http://www.katom.com/158-575950.html. It was a little pricey, but it's big and stainless. It would fit perfectly in my keggle if the handles didn't stick out so far.
Forum: Automated Brewing Forum 10-28-2013, 11:39 PM
Replies: 39
Views: 5,888
Posted By tob77
Thanks for sharing! I like the comprehensive set...

Thanks for sharing! I like the comprehensive set of tuning rules that you included. Do you have a favorite?
Forum: Automated Brewing Forum 10-21-2013, 05:49 AM
Replies: 77
Views: 9,101
Posted By tob77
I was able to try out the relay tuning method...

I was able to try out the relay tuning method today. I am very happy with my new results. I ended up using Kp = 0.33*Ku, Ki = 0.33*Ku / (0.5*Pu), Kd = 0. Where Ku is the gain from the test and Pu...
Forum: Automated Brewing Forum 10-20-2013, 05:35 PM
Replies: 77
Views: 9,101
Posted By tob77
I've ran into some of the same problems as you...

I've ran into some of the same problems as you have. I adjust my minimum CV value according to how windy it is outside and I've been leaving the top completely off to prevent the temp from...
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