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03/30/05 16:04
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#90694 - Forgot to press the "Post" button
Responding to: ???'s previous message
Ijaz Ahmed said:
Please explain a little what do you plan to do and how?. May be I am completely missing your idea but here We use nothing such stuff, just simple On/Off switches directly controlling the AC appliances.

Something must have gone wrong, since I already replied on Erik's question, who was also asking for a bit more clarification. Apparently, I forgot to press the "Post" button...

Erik's remark:

40 fuses? that sounds like an awwful lot. Are you doing more fuses than "house fuses"?

Indeed, maybe 40 fuses sounds a lot. But since I build a new house, I want to have an as flexible as possible system. What I'm creating is not a 'standard equipped house', if this is what you meant, Erik

So, I will try to explain what I'm developing for the moment. Hope it will not 'bore' you, but since more info is asked, I'll give it a try...

My intention (and not only intention, it's really what I want to achieve):

Set up a system that gives me a comfortable control of the whole house electricity. This includes: control over outlets, lights, room temperature control, light measurement, heating system control,...

I also want to have the possibility to switch everything off (both lights as well as outlets), when I leave the house (except, of course, things like freezer, heating system, refrigerator, in short: the necessary things should be kept powered).

So, you can already see that I want to control all my outlets in the house. Hence, the need for something to switch on/off the power on the outlets.

That 'something' can be a relay, a teleruptor, a pulsar, a... whatever.

The same for the lights: I want to have control over all the lights. Some places in the house will even have the possibility to be dimmed, to have special 'moods' (meaning defining groups of lights that will be activated, depending on the 'mood' selected).
For instance: when watching the television, other lights with other intensity will be activated compared to the lights that will be activated when having visitors for a dinner.
I also want to have the possibility to switch on the lights automatically, when it's becoming dark outside, etc. etc,...

The only restriction should be my own creativity, but I want to foresee the neccesary 'hardware' or 'infrastructure' to be able to control all this.

For the lights, I've chosen for relais. Why? The consumption of the relais will be low. Since I divided my circuits in such a way that I can control almost every light individual, there's no need for 'heavy' relais. The ones that I will use will be able to switch a max. of 10A (on 220V, that means roughly 2200W!!!).
That's more than enough to control the lights. Those relais have a very low power consumption, something that is also important for me.
When activated, they will consume very little (approx. 0.5W, which is not a lot).

For the outlets, that's another story. For this, I can't use those lightweight relais, since we're talking of currents up till 20Amp (and maybe more). You don't switch this with a simple relais.
If you want to stick to relais for outlet switching too, then you need relais that will consume remarkeably more (I've seen some consuming a few Watts!) and you will have to activate them for most of the time, something which is not needed for the lights (outlets have to be powered almost the whole day, while lights only need to be activated a few hours a day).

That's the main reason why I want to make use of that kind of teleruptors. Once they're in a state, you don't have to power them anymore to stay in that state, unless you want to change the state.

But, as I already mentioned, it's hard to 'sync' with those teleruptors, since you don't have any feedback of them.
With relais, that's something different: if you power them, then you're sure they're on (if they are NO contacts, I mean). For relais, you don't need any feedback.

So, that's why I'm looking for a 'clever' way to know if the output of the teleruptor has mains or not. If it has, then it's in the 'on' state, if not, then it's in the 'off' state.


That's a bit my problem for the moment.

I hope I've been clear enough for you to understand where I want to go to.

Of course, I can write a complete magnus opum, but that cannot be the intention, I assume.

However, if more input is still needed, pls. trigger me.

Best rgds,

--Geert

List of 37 messages in thread
TopicAuthorDate
Detecting 220V            01/01/70 00:00      
   AC-input optoisolator            01/01/70 00:00      
      Thanks!            01/01/70 00:00      
   I'd use a transformer            01/01/70 00:00      
      Why the transformer?            01/01/70 00:00      
         not necessarily relative to ground            01/01/70 00:00      
            Neon + LDR?            01/01/70 00:00      
      I read the Datasheet of MID400            01/01/70 00:00      
         MID400            01/01/70 00:00      
            That's strange, Erik!            01/01/70 00:00      
               recognized            01/01/70 00:00      
                  "You're Forgiven, Not Forgotten..."            01/01/70 00:00      
   Transformer isolation recommended            01/01/70 00:00      
      May I Modify Your Suggestion Kai ??            01/01/70 00:00      
         Of course...            01/01/70 00:00      
            Kai, Michael - what about ready-made            01/01/70 00:00      
               Could also solve the problem            01/01/70 00:00      
                  One futther on the Wall Wart Idea...            01/01/70 00:00      
                  Wall Wart            01/01/70 00:00      
      Is optoisolation fundamentally dangerous            01/01/70 00:00      
         No, not fundamentally, but...            01/01/70 00:00      
            What is dangerous?            01/01/70 00:00      
   A different view            01/01/70 00:00      
   I'm sweating... ;-)            01/01/70 00:00      
      wallwarts            01/01/70 00:00      
         Oh, I see!            01/01/70 00:00      
            that's a lot of fuses            01/01/70 00:00      
            A bit clarification required            01/01/70 00:00      
               Forgot to press the "Post" button            01/01/70 00:00      
                  enough, yes - that much, no            01/01/70 00:00      
                  Existing commercial products            01/01/70 00:00      
                     Quite a large project, indeed...            01/01/70 00:00      
                        Mains control            01/01/70 00:00      
                           I know...            01/01/70 00:00      
                        Safety issues            01/01/70 00:00      
   Another idea, using a coil and an op-amp            01/01/70 00:00      
      RE: Another idea...            01/01/70 00:00      

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