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Old 03-25-2011, 03:27 PM   #91
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if the relay is rated for 12 v can i run it off a 5 v phone charger?

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Old 03-28-2011, 01:09 AM   #92
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This question is for those of you that have built one of these systems.

I am planning on using one of these to convert a freezer to a kegerator and was wondering what the sensitivity is on the unit. Will it be constantly turning my compressor on and off or does it not kick on until it breaks a certain range (like the johnson controllers)?

Thanks,
Dave

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Old 03-28-2011, 02:53 AM   #93
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i think there is a build in delay on the thermostat that i used. it might turn on the freezer more than something with lots of set points, but i bet it won't be that much more.

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Old 03-28-2011, 12:20 PM   #94
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the thermostat i bought has settings that i can change to have 1 3 or5 degree "dead zone". i would think all home thermostats would have this, or else it would be cutting your AC and heater off and on all day.

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Old 05-21-2011, 03:12 AM   #95
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Default Just built mine

It's working nicely at controlling this fridge, can't wait to get it to the real one. I used an automotive relay instead of the SSR.

img_20110520_214617.jpg  
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Old 08-18-2011, 03:33 PM   #96
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Could this be used to run a Water Heating element??

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Old 08-18-2011, 04:40 PM   #97
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Technically, if the relay is built to handle that voltage/amperage, yes. The temperature-sensitive device is only turning the relay on or off.

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Old 08-22-2011, 01:59 PM   #98
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I'm using this idea for my fermentation chamber. I already have modified thermostat from my old SOF chiller that I can use. Pretty much all I need to do is add a SSR.



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Could this be used to run a Water Heating element??
Yes, but I haven't seen anyone do this before. Probably because the temperature reading may not be accurate enough. Have you found anyone who has done it?
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Old 09-30-2011, 03:28 PM   #99
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I am having my first brew day today and I built one of these yesterday in order to better control my temperature (I keep my house between 76 and 78 which is bad for fermentation). I ordered a SSR from eBay and I am temporarily using an automotive relay from Radio Shack. Other than the Hunter Thermostat seems to be about 2.5 degrees off I am quite happy and I have not set the house on fire. American Wheat (all-grain) is mashing right now at the target temp.

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Old 10-02-2011, 02:00 PM   #100
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Just an fyi the ssr relays won't switch without a load of some sort.
So just powering up the low voltage control side and checking for continuity may leave you to believe they aren't working.

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