CORTE de DIY - HOWTO fazem um termostato da cerveja de Arduino
Este projeto merece um A++ para fazer algo relacionado com cerveja! Enquanto eu estou engolindo Budweiser 40 para baixo minha garganta, eu encontro este email em meu inbox aproximadamente HOWTO fazem um termostato da cerveja de Arduino! Fresco… Prosiga o trabalho grande David e agradecimentos para a ponta!
Eu pertenço a um grupo diverso dos amadores que têm um fascínio para brewing nossa própria cerveja. Além à satisfação de brewing a cerveja eu bebo, e o controle que eu tenho sobre o processo (e a abilidade evitar fàcilmente a cerveja mega-swill crappy dos breweries grandes), nós os homebrewers começam jogar com um grupo de dispositivos frescos. Mesmo se você não tiver nenhum interesse em cerveja refrigerar, esta informação neste tutorial pode ser aplicada a outros projetos que envolvem sensores análogos, e dispositivos de alta tensão/atuais.
Over the past few months, I’ve started kegging my own beer, at home. This is a pretty simple process, but one of the key ingredients to making consumable draught beer is temperature control. Obviously, beer doesn’t taste quite as good if it’s warm (or too cold, for that matter), but there’s more to it: carbon dioxide is much more soluble in water (or beer) at lower temperatures, so it’s essential that kegs be kept cold, when serving.
Most homebrewers take one of three approaches to cooling their beer: buying a pre-made kegerator, gutting a regular refrigerator to hold kegs with taps on the door, or altering a chest freezer to hold the kegs and mount taps. I chose to take the third approach (a friend was getting rid of a near-perfect sized chest freezer).
Generally, chest freezers have thermostats that work in the “freezer” range. That is, below 0ºC, or below water’s freezing point. Even at the “warmest” temperature, most freezers will still freeze beer. This is no good when it comes to kegerators. Many homebrewers solve this problem with a device referred to as a “Johnson,” “Love,” or “Ranco” controller (depending on the brand of controller). Basically, this device plugs between the AC mains and the chest freezer, and has a temperature probe that is placed in the freezer (the freezer’s internal thermostat is set at “maximum cold”). The temperature probe, depending on the model chosen, will either be a solid/liquid mechanical probe (usually found on the cheaper controllers–this is likely the same type as is found on the freezer’s internal controller), or a thermistor.
One day, a few weeks ago, I had the urge to finally get my chest kegerator cooling my beer. Living in Canada has its benefits, but one of the recurring problems we Canadians face is the difficulty (and delay) in having items shipped from the US (where most of these controllers are made/sold). I wanted to get it working now, not in a week, or more, when a controller would arrive. Additionally, these controllers can run for anywhere from $60-200. I didn’t feel like waiting, and I didn’t feel like paying. So, what’s a resourceful geek supposed to do? Build your own, of course.
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