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Old 09-06-2010, 07:01 PM   #41
bmorgan
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I, too, reinvented the wheel. This is my 3rd Arduino project and I see no end in sight. I am a gadget freak and they're even more fun when you roll your own.


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Old 09-08-2010, 04:49 PM   #42
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that one looks pretty bad ass, nice work.


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Old 10-07-2010, 07:27 PM   #43
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Default Thermostat Temp Controller

Thanks for the info android mine work great.
I used an old cellphone charger and an $5 SSR from ebay
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Old 10-07-2010, 07:51 PM   #44
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Well done. You surely spent a fraction of what I did.
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Old 11-06-2010, 12:47 PM   #45
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Quote:
Originally Posted by statman View Post
Its good you can do all of that stuff but those costs add up and that makes less time for the pretty stuff. For 70 bucks, why not buy the Johnson electronic (not mechanical) control with adjustable time-delay and differential and all you have to do is plug it in (and drop the probe inside). We are selling more and more of these. It takes 3 minutes to read the instructions and about 1 minute to program it.

You have kind of a valid point..to an extent. If something broke in the Johnson controller you would have to spend another $70 on a new controller. If something broke in this case you could do it much cheaper on a component-by-component basis. Plus people just love DIY and learning It may not be the best solution but its pretty darn cool.
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Old 01-10-2011, 11:39 PM   #46
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Default hmmmm?

is it possible to make this into a 2 stage temp controlleR?

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Old 01-11-2011, 12:43 AM   #47
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is it possible to make this into a 2 stage temp controlleR?

East enders
well, it will function as both, but of course you have to set the function to 'heat' or 'cool' on the thermostat. and i could swear i remember reading somewhere that if you use two SSRs or something, you can get it to function that way... but it's a vague memory.

what will you be using it for? if it's a fermentation chamber, you should be able to use one of the other without too many problems. i have a dual stage temp controller that i've used for fermenting and for kegerator temp control, and i've never had to have it set up as a simultaneous cold/heat unit. my basement is typically around 60 degrees, so i either turn it to heat to ferment warmer, or cool to ferment lagers. and if you will be using this for cold temps, make sure you get a thermostat that goes down that far. I cannot use mine for a kegerator, it only goes down to like 45 or so.
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Old 01-11-2011, 01:01 AM   #48
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after re-reading the whole thread, i think it's on page 2 or 3 where someone mentions how they used two SSRs to do the simultaneous heat/cool. automotive relays to be exact.
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Old 01-11-2011, 01:06 AM   #49
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is it possible to make this into a 2 stage temp controlleR?

East enders
If you are talking about the Johnson unit, no-it is a single stage unit. They make a 2 stage electro mechanical unit and an electronic version but of course they are more money, like 140 to 200 or so.
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Old 03-02-2011, 02:14 AM   #50
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Sorry for the bump, but I am working out my temperature controller right now, and it is quite similar to your build. You say that the SSR does not require a heat sink for this application. Just wondering if you've noticed how hot it actually gets? I am doing a dual stage controller, so I will have two SSRs in the enclosure, obviously not both running at the same time.

Trying to figure out if I might want to wire a fan into the enclosure itself, or possibly just vent it. Just paranoid about anything that can run in an unattended state.


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