Temperature Controller #1 #homebrew
December 19, 2012 1 Comment
Homebrew (http://www.homebrewfinds.com/2012/02/temp-controller-round-up.html) finds regularly posts controllers on sale at eBay, like this:
These appear to be aquarium controllers. Hey get sold on eBay for $13/$20 or more, including shipping. You have to be careful to select the right voltage, look to see if they are dual stage (heat and cool), and wired or not. The unit I bought is dual stage, un-wired, and reads Celsius only. The seller has been awesome when there have been issues, and shipping was fast (from Hong Kong).
My plans for this is a fermentation controller since I want to have both heat and cooling, but I also want to play with it. The controller can handle 10A at 220V, which is 15A at 120, sorta, I would not want to push it with something like a heat stick, but an aquarium heater, immersion heater, hot plate, even a fridge should be fine.
I did some quick tests, mostly hooking up power up and attaching it to an outlet.
When I went to look for ways to mount the controller, I did a quick search. A few just mounted it into random boxes, and some into the device they were controlling (like a keezer). But then the awesome Revvy from homebrewtalk posted his build in a long thread.
So I had to build that! I modified the circuit in a few ways. I saw no need for a different outlet for heat and cool. You can split an outlet and I would never need to plug two things at once. That gave me room to put a switch in the unit. Then I ran the entire circuit through a GFCI. All down stream circuits are protected and I have a GFCI circuit for tools. Given that this will be used for water areas, this is critical.
I really like this package, as it is portable, clean and protected.
The circuit I used: