#21  
Old 07-18-2011, 09:29 AM
Laborer
 
Join Date: Jun 2011
Location: Westborough, MA
Posts: 59
Default Re: Jake's In Mass (Started July 3, 2011)

Started on the base this weekend, didn't get much time to work on it(family visiting). Hope to have the base and hearth done and framed by the end of next weekend.
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  #22  
Old 07-18-2011, 09:37 AM
Peasant
 
Join Date: Mar 2011
Location: Boca Raton, Florida
Posts: 48
Smile Re: Jake's In Mass (Started July 3, 2011)

Just get done what you can. It goes faster than you think. What's with the extra blocks in the corners? When you get done with the stand and hearth, the rest is more thinking, less heavy lifting. Looks good so far!
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  #23  
Old 07-18-2011, 09:42 AM
Laborer
 
Join Date: Jun 2011
Location: Westborough, MA
Posts: 59
Default Re: Jake's In Mass (Started July 3, 2011)

I used some 1/2 blocks for some extra hearth size and to offset the 3/8" lost by dry stacking blocks. Gave me a couple of extra inches from my base design overall without going a full 8-16".
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  #24  
Old 07-21-2011, 07:02 PM
Laborer
 
Join Date: Jun 2011
Location: Westborough, MA
Posts: 59
Default Re: Jake's In Mass (Started July 3, 2011)

Gathering some supplies, thanks to my dad who has access to agricultural supplies.
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  #25  
Old 07-25-2011, 06:29 AM
Laborer
 
Join Date: Jun 2011
Location: Westborough, MA
Posts: 59
Default Re: Jake's In Mass (Started July 3, 2011)

Getting there, I wanted to get the hearth done before this coming weekend, but probably not going to happen. I have a playground build happening so it will probably be a couple of weeks before I get to it. So far so good though.
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  #26  
Old 07-31-2011, 06:52 PM
Laborer
 
Join Date: Jun 2011
Location: Westborough, MA
Posts: 59
Default Re: Jake's In Mass (Started July 3, 2011)

Quick update. This weekend was spent working on a playground at our preschool. However, I am ready to get the rebar going on the hearth and I will probably pour that this weekend with the insulating layer too.

I'm the fat one in the pics and my brother Matt is the bald one. Total we had 20 people working on the playground.
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Jake's In Mass (Started July 3, 2011)-226050_252758874754063_110299419000010_964085_7264562_n.jpg   Jake's In Mass (Started July 3, 2011)-251425_252757731420844_110299419000010_964057_6009674_n.jpg   Jake's In Mass (Started July 3, 2011)-imag0403.jpg  
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  #27  
Old 08-01-2011, 05:39 AM
Peasant
 
Join Date: Mar 2011
Location: Boca Raton, Florida
Posts: 48
Wink Re: Jake's In Mass (Started July 3, 2011)

Fat? Looks like relaxed muscle to me! Trust me, I'm a doctor...
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  #28  
Old 08-02-2011, 02:00 PM
Laborer
 
Join Date: Jun 2011
Location: Westborough, MA
Posts: 59
Default Re: Jake's In Mass (Started July 3, 2011)

So, here is a little something different. Looking at a lot of posts about Thermocouples. While I understand the "get to know" your oven mentality, I plan on using my over a lot for bread and longer roasts too, so more data on the temperature profile will be well worth it.

So, in true nerd fashion and not wanting to pay for a commercial unit. I came up with the attached schematic and board design capable of monitoring up to six thermocouples. Could easily be less by not populating the parts, or more by changing the schematic some.

There is no interface to this, it is powered with a rechargeable LiPo battery and has a bluetooth connection. I have written a simple Android application to communicate with it allowing me to calibrate and view temperatures, as well as log the temperature over time.

If anyone else is interested in the electronics part of this let me know and I can post more information.
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File Type: pdf BrickOven-sch.pdf (15.0 KB, 169 views)
File Type: pdf BrickOven.pdf (39.7 KB, 155 views)
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  #29  
Old 08-04-2011, 01:21 PM
Apprentice
 
Join Date: Sep 2010
Location: Easley, SC
Posts: 114
Default Re: Jake's In Mass (Started July 3, 2011)

Hi Jake,
It's really taking shape!
You're catching up to me!
My hearth slab is curing and next I need to go buy the portland cement and perlite for the hearth insulation.
How expensive of a setup will it be for the thermocouples and circuitry?
Where are you planning to place your t/c?
Thanks,
Jeff
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  #30  
Old 08-04-2011, 01:49 PM
Laborer
 
Join Date: Jun 2011
Location: Westborough, MA
Posts: 59
Default Re: Jake's In Mass (Started July 3, 2011)

Jeff,
The thermocouples themselves are not too expensive:
High Temperature Thermocouple for Kiln [TC-K-KLN] - $25.30 : auberins.com, Temperature control solutions for home and industry
Ceramic Sheath for Kiln thermocouple [TC-K-KLNSH] - $18.00 : auberins.com, Temperature control solutions for home and industry

Those I will put right to the surface with just a skim of mortar over them. I will probably put one in the center of the floor, one in the top of the dome and one 1/2 way up.

Then:
K Type Thermocouple (6 ft. cable) English thread [TC-K6] - $6.85 : auberins.com, Temperature control solutions for home and industry

I am going to drill and embed a nut into a few bricks to screw these into. Probably the same locations but these will be for saturation temperature.

They will all be replaceable.

Separate of the cost of the thermocouples themselves. I went a little expensive to make it easy, I could definitely do it with cheaper electronics. Also, I am getting everything from sparkfun.com, not the cheapest, but definitely the easiest.

Each Thermocouple IC cost $10, so that is $60, I could have made it use just 1, but that's no fun! The BlueTooth is $30, could have done a screen for $10, but it seemed fun to make it BlueTooth. Batter is $10, PCB is $10, Arduino is $20.

For me I already have a lot of these parts hanging around, so I'm only really buying $50 worth of stuff right now.

If I did it all from scratch, and had nothing on hand I am probably looking at:
Thermocouples: $150
Electronics: < $100

I attached an image of the prototype, really pretty simple and very accurate thanks to the MAX6675 IC
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