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Messages - calebw

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Pimp My System / Re: Programmable Fermentation Chamber Thermostat
« on: June 21, 2013, 07:48:31 PM »
Hey all!  I just wanted to give a quick update about the Fermostat.  I've decided to make a few upgrades for the production model.  The LCD screen will be updated to a graphic screen, so it will be able to show graphs and other visual representations not possible with a character screen.

But the big upgrade is that I plan to add an SD Card to the unit.  This will allow for you to download historical log data to your computer.  It will also allow you to create your programs on a computer and upload them to the Fermostat instead of creating on the unit itself.  I'm also developing a webtool where you will be able to share your programs with other people and download programs instead of creating them.  Anyway, big stuff!!

Check out some other news and updates that I can't post here at my website.


Pimp My System / Re: Programmable Fermentation Chamber Thermostat
« on: June 06, 2013, 12:43:32 AM »

Last in on your early bird.  Glad I found this thread.


Thanks Brett!

And yes, the Kickstarter campaign is currently running!  Check it out if you're interested!!

Pimp My System / Re: Programmable Fermentation Chamber Thermostat
« on: March 20, 2013, 05:59:03 AM »
Yes.  I'm getting there. Thanks for checking!  I'm working on the Kickstarter video right now and hope to have it ready in a couple weeks or so. 

I've most recently been working on the dual stage version of the beta unit. I have several of the units built and am testing out the software updates/fixes for it.  I have also been working on a new PID-type controller algorithm to control the output. This will allow for the Fermostat to predict how the temperature will react in the future based on previous data. This will prevent overshoots and temperature oscillations and create quite a bit more temperature precision than other controllers out there.   I'm still ironing out the details for this new algorithm and it probably will have to be included in a future update for the units.

Pimp My System / Re: Programmable Fermentation Chamber Thermostat
« on: February 01, 2013, 02:26:04 AM »
Sounds cool, man. Didn't mean to sound harsh, I actually asked questions because I'm actually in the market for a new 2-stage.

The Ranco 2-stage costs around $140 from MoreBeer, so I'd be interested in your model!

Need beta testers by any chance?

No problem at all, I welcome critiques... especially now while I can still make adjustments as needed.  I do still have a beta unit that hasn't been spoken for.  It will be about 5 weeks before the dual-stage ones will be ready (PCB fab during the chinese new year is dreadful).  Plus I'll hound you for feedback from time to time.  If you're still interested send me an PM or email (listed above) and I'll let you know when they are ready.

Pimp My System / Re: Programmable Fermentation Chamber Thermostat
« on: January 31, 2013, 02:41:29 PM »

What do you mean by "No set up or programming"? Does this mean I don't have control over setpoints/differential?

He answers most of that with the next bullet point (I think).

Cleverly Sophisticated
    Use factory installed programs, or create your own programs to adapt to your particular recipes and methods; intricate or elementary, it's your choice.

You can program it but you don' have to.


Yes, there are some preset programs initially installed (e.g. there is a default lager program), plus you will be able to store multiple programs you have created. You can name the programs whatever you like so re-accessing them in the menu is easy.

Also, yes, it is going to be dual stage.  The first beta version was only single-stage, but I just sent off the design files to have a new dual-stage PCB fabbed.  I'm planning on make a few dual-stage test versions before release the retail version... most likely this summer.

Pimp My System / Re: Programmable Fermentation Chamber Thermostat
« on: January 30, 2013, 03:09:38 AM »

I'm trying to have the retail version priced around $130 or so.

Pimp My System / Programmable Fermentation Chamber Thermostat
« on: January 26, 2013, 09:06:27 PM »
Hey all! 

I'm new to this forum, but I've been brewing beer for about 3 years now.
I am an electrical engineer and had an idea last year to design/build a programmable thermostat to control a fermentation device.  It turned out really well and I decided to give it a name, make a business around the idea (Ohmbrew Automations) and go into production with them.  Since then, I've currently built a dozen units of the 'Fermostat' and have sold them to a group of local early adopters to refine the device before I go into a larger scale production with them. 

Basically, the retail version will be a programmable, dual-stage thermostat for a fermentation device or even just controlling your kegerator/keezer.  It has the ability for the user to create and store a program (or several) that creates a temperature profile for your chamber.  This is especially useful for when fermenting a lager where you have to slowly lower the temperature after brewing to the ferment temperature, then slowly increase the temperature over time to do a diacelyl rest, then again lower the temperature to lager the brew.  With the Fermostat, you can create this program (or use one of the pre-set ones).  Running this program will take care of the whole process from start to finish without any user interaction required.

The Fermostat also allows you to maneuver around within a program.  For instance, you want to skip the first couple steps and want to go straight to the diacetyl rest section of the program, you are able to do that. It also allows you to move around within a particular stage, for instance if you want to start on day 3 of the 14 day fermentation stage, it will allow you to easily do that within the menu.

I think I'm going to start a Kickstarter campaign for it in the next month or two which will allow me to pre-sell some of the devices and get the word out there. 

I've got some more information about it on my website at if you are interested.  Be sure and stop by and check it out.  There are a few videos that show it in action on the support page too. The blog page shows has information I've posted throughout the build process and pictures of the first version I built.

Let me know what you think!  Feel free to PM me or email me at too.

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