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Home Brew Forums > Home Brewing Beer > DIY Projects > Fermenters > ebay aquarium temp controller build
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Old 12-09-2010, 06:32 PM   #501
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jason, are you planning to use this for fermentation or keg serving? i use mine on my keezer and have never needed to use the heating side of things.

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ebay temp controller | thermostat temp controller
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Old 12-09-2010, 06:40 PM   #502
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jason, are you planning to use this for fermentation or keg serving? i use mine on my keezer and have never needed to use the heating side of things.
one is for keezer so I guess its fine, but the other was going to get hooked up to a mini fridge converted into fermentation box

I guess I can sell one and buy a dual heat/cool unit.


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Old 12-10-2010, 05:58 AM   #503
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Default Thermistor

A couple people asked awhile back what could be done to replace the sensor if it got broken. Looking at the other single stage controller listed by the seller, the sensor is "NTC sensor (10 kΩ / 25 °C, B value 3435 K)". I imagine this is about the same, especially given that one poster awhile back mentioned that a 10k resistor read 25°C on the controller. Given that, wiring up a simple thermistor like this should offer a decent replacement for the sensor on the controller.

http://www.jameco.com/webapp/wcs/sto...001_1871852_-1

Of course, I'm sure it's not to hard to find this a single version somewhere (digi-key).

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Old 12-10-2010, 09:45 AM   #504
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I was under the impression that you could have a heating and cooling component plugged in and the controller would alternate between the two circuits to maintain the set temperature. This is not correct then? It either heats or cools, but does not alternate?

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Old 12-10-2010, 11:47 AM   #505
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you can. I haven't been following the last bit of convo here, but if you look at the original product in this thread, it can do both (not at the same time obviously, but it will alternate to hold a temp like you said).


temp controller on ebay

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Old 12-10-2010, 02:16 PM   #506
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I was under the impression that you could have a heating and cooling component plugged in and the controller would alternate between the two circuits to maintain the set temperature. This is not correct then? It either heats or cools, but does not alternate?
OrangeHero, that is correct the Original unit has both heating and cooling, there was a single stage unit that looked different with only 2 buttons, but now they are making single stage units with 4 buttons that looks like the dual stage units.

I was one of unlucky ones who got duped into buying a single stage thinking it was dual. unfortunately I bought 2 units I can use one for my keezer, but for my fermentation box I'd like a 2 stage unit so it will kick on the heater to get up to temp.

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Old 12-10-2010, 02:23 PM   #507
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sorry. noob question. where does it actually heat/cool from. i want to step up to all grain and would like to also start paying more attention to temp control. does it come from the wire you have off the right side of that temperature read out? what does that attach to? thanks!

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Old 12-10-2010, 02:23 PM   #508
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also i like the handy work. nice and neat look. kudos

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Old 12-11-2010, 02:30 AM   #509
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I finally finished building my controller.




I will be doing an ale next and I am going to use a stand up refrigerator as
a fermentation chamber hocked up to this controller.
Now my question; what would I use for heating that is not going to melt the
inside of the Refrigerator?

Thank you.

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Old 12-11-2010, 11:09 AM   #510
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regular heating pad from the drug store

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