Example of Sensing and 支配（する）／統制する: Thermostat 無視／無効
This page goes over some considerations which may be useful to amateurs trying to use computers to sense 気温s and turn on heating (or 冷静な／正味のing) 器具／備品 as needed.
許す me repeating something I say どこかよそで: 世帯 electricity (i.e. voltages over say 30 volts, e.g. 110v in US, 230v in UK) is very dangerous. Even lower voltages can be dangerous, if not 尊敬（する）・点d. Be sure you don't do things beyond your 技術 level. If you don't 電気椅子で死刑にする yourself or others, you might 燃やす something 負かす／撃墜する.
Fooling about with your heating system can be risky in some 気候s. Have you ever seen the 損失 原因（となる）d when 麻薬を吸うs burst 予定 to 氷点の? You really don't want to! And remember Murphy's 法律. It will 確実にする that the uncontrolled 噴出する of water will a) be coming from someplace upstairs, and b) start about an hour after you leave for a long 週末 away.
Hence the ideas which follow.
Heating systems can be as simple as.....
"SW1" is the thermostat. It "の近くにs" ("turns on") when the 気温 落ちるs below whatever level you have it 始める，決める for. The circlular symbol labelled "力／強力にする" is where the 回路・連盟 connects to the (dangerous) 世帯 力／強力にする.
If you are lucky, your system will be done as follows. (If you are not lucky, it can be changed to the に引き続いて... by a professional... やめる easily)
SW1 now turns on the coil in the low voltage relay. A relay is just an electrically operated switch. SW1 is still the thermostat.
Notice the two points 示すd "A" and "B". I'm going to 示唆する you 追加する some other things to the 回路・連盟 between them.
The 回路・連盟 above shows what I 示唆する you 追加する to a 回路・連盟 like the one shown in the second diagram. 公式文書，認める the "A" and "B". They correspond to the "A" and "B" in the second diagram.
SW1 is still the ordinary thermostat.
SW2 is a second thermostat.
SW3 is a computer controlled switch. There are many ways to 支配（する）／統制する a switch by a computer, any of them will do for this. SW3 is just an ordinary toggle switch, and is optional.
(I'll come to SW4 in a moment.)
The 核心 of my suggestion is that you 始める，決める SW1 to whatever 気温 you want to be the "床に打ち倒す" in the 環境 you are heating. In theory, nothing that happens because of your 試みる／企てる to introduce computer 支配（する）／統制する of the heating can 原因（となる） a fault which would leave the heat off if the 気温, as sensed by SW1, 落ちるs below the "床に打ち倒す" 始める，決める in that thermostat.
To make the 環境 hotter than SW1 要求するs, just turn on SW3. If the 気温 goes above the setting in SW2, the heat will be turned off, 関わりなく what SW3 thinks of things. You can dispense with SW2, as long as you don't mind your heating 法案s going through the roof, your 工場／植物s 存在 cooked, in the event of a 失敗 in the 支配（する）／統制する of SW3.
SW4 is a way to over-ride SW3. If your computer-controlled SW3 isn't working 権利, you can make SW2 決定する the 環境 気温 by の近くにing SW4. Of course, if SW1's setting of is easily changed, you could also 簡単に it to turn up the heat when SW3 is failing to の近くに.
K.I.S.S.: Keep It Simple. How is the design above "simple"? It isn't... compared to a "dumb" heat 支配（する）／統制する system. But it "作品" (at least to the extent of not letting your 環境 get too 冷淡な) 関わりなく what the computer does. If you "wire in" the computer in a more obvious, いっそう少なく コンビナート／複合体, way, you are relying on something verynot simple to work all the time.
Enjoy! Happy Controlling.
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