Re: Home Automation Dealers in Chch?

2009-05-04 Thread yuri
Chris Hellyar commented:
> Home automation systems are not attractive to home buyers unless they are
> geeks, and lets face it, we're a minority.  Even having comprehensive
> structured cabling in a house can be seen as a negative by realestate agents
> and a fair percentage of 'Average' buyers.

That depends on how it is presented.
*Any* alteration that looks amateurish/DIYish will detract from the
value. This applies to geeky wiring, lean-to sunrooms, DIY
carports/sheds, whatever.

The advantage of getting the sparky to install it when the house is
being built is that it will look like it belongs there and not tacked
on as an afterthought.

It also depends on how it is marketed. When you describe the features
of a house you are selling, don't use terms that make non-geeks' eyes
glaze over.
Instead market it in terms of useful things you can do, eg turn on
heaters half an hour before you get up. The simplest form of
automation is a bunch of timers in the 2nd switchboard (you can get
DIN mounted timers the width of 2 MCBs that are easy to set).

The set-up I outlined in my previous email can start with something as
simple as timers, and be expanded to relays controlled by computer, or
the relay outputs on a security alarm, or anything you like.

Note on safety: Most DIN mounted relays provide 400V insulation
between the extra-low-voltage coils and the mains terminals, so it is
safe to connect the outputs of any Arduino-type device to the relay
coils. Just make sure any wires from your device going into the
switchboard are rated for mains voltage, even though you are using
extra-low-voltage (eg double insulated conduit wire).

Yuri


Re: Home Automation Dealers in Chch?

2009-05-03 Thread Chris Hellyar
Hi Yuri,

You missed another important advantage of having the automation gear in
a separate switchboard..

When you come to sell the house, if you do, you can rip it all out and
get a sparky to put standard bus-bars into the automation cabinet to
take it back to a normal house.

Home automation systems are not attractive to home buyers unless they
are geeks, and lets face it, we're a minority.  Even having
comprehensive structured cabling in a house can be seen as a negative by
realestate agents and a fair percentage of 'Average' buyers.

Cheers, Me.

On Sun, 2009-05-03 at 17:30 +1200, yuri wrote:


> Also, you can rip out whatever is in the control switchboard and
> replace it with something else.




Re: Home Automation Dealers in Chch?

2009-05-02 Thread yuri
Brett Davidson re-opened this thread with the words:
> I am building a new house at present and am looking at what control systems
> are out there worth considering implementing as this will help me what and
> where I should pre-wire and where I can use IR or bluetooth, etc. I want to
> do it all - switch audio/video along with control of appliances and
> monitoring of energy usage, etc.

As far as turning lights and certain power outlets on and off automagically:

Install a separate 45 or 60 way switchboard which will house
relays/contactors/timers/PLCs/whatever.

>From each light switch that you want control, get Sparky to run a
three-core[1] electrical cable from the light switch to the control
switchboard.

For each power socket that you want to control, get Sparky to run a
four-core[2] (3C+E) from the power socket to the control switchboard.

The controlled power sockets can have an extra switch[3] to select
between manual and auto, hence the extra cores to carry the "always
on" (manual) feed and the "controlled" (auto) feed.

The advantage of the above set-up is that if you automation system
fails, everything has manual override wired in so lights and
controlled power sockets can operate as normal lights and power
sockets.

Also, you can rip out whatever is in the control switchboard and
replace it with something else.

Relays can have 12V coils that are controlled by your linux box, with
the proper isolation if required.

Yuri


[1] Three core has the same number of conductors as twin & earth, but
the colours are different. 3C has red/white/blue while T&E has
red/black/green. The reason this matters is that the green can't be
used for anything other than protective earth.

[2] 3C+Earth has red/white/blue/green. Blue & Green can be used for
neutral & earth, while red and white can be used for "Always On" and
"Controlled" feeds.

[3] eg PDL 691X is a socket outlet with room for an extra switch.


Re: Home Automation Dealers in Chch?

2009-04-23 Thread Hadley Rich
On Fri, 2009-04-24 at 14:19 +1200, Brett Davidson wrote:
> This approach interests me. I gather then that you run the Arduinos 
> locally in each room/area with sensors attached to these and then use 
> Zigbee and/or ethernet to connect the Arduinos back to your Linux
> server.

That's correct. A Zigbee USB adapter on the host and nodes scattered
around.

> What software are you running on the Linux server?

No official software yet, just dumping data into PostgreSQL and bunches
of Python scripts currently.

> For that matter, what software are you running on the Arduinos? :-)

So far just things hacked together from examples around the 'net.

It's serial communication so basically just broadcasting "Temperature is
20 degrees", "Switch Pushed", "Motion detected" etc. to the server and
then "Turn light on", "Send SMS" etc. back.

> Running wires etc is all old hat.

Wires are handy if you already have them, annoying if you don't. That's
why I'm using some Zigbee.

> Unfortunately, WAF needs to be factored in. She's not really into 
> tinkering as much as I. :-) And I to no longer have as much free time 
> for this as I used to. :-(

Indeed. The thing about having Arduinos/controllers around the place is
that you can do local processing at the same time as remote.

For example, switch pushed = turn on light and/or notify server. You can
be completely self contained, completely reliant on the server, or a bit
of both. This approach lends itself to progressive enhancement without
breaking normal expected functionality.

At this stage it's very much hacked up bits and pieces, we recently
shifted so amongst that and others things I haven't had a lot of time to
do anything with it. When I get some time I'll be doing something more
with it and sharing more etc.

hads



Re: Home Automation Dealers in Chch?

2009-04-23 Thread Brett Davidson
This approach interests me. I gather then that you run the Arduinos 
locally in each room/area with sensors attached to these and then use 
Zigbee and/or ethernet to connect the Arduinos back to your Linux server.

What software are you running on the Linux server?
For that matter, what software are you running on the Arduinos? :-)

Running wires etc is all old hat. I had not thought about electrically 
isolating various areas and to be honest, I'm not even sure what that means.
To do true isolation I would need to run 1:1 transformers or equivalent 
devices. I'm sure the comments here do not espouse that even if that 
would truly isolate areas from each other.


Unfortunately, WAF needs to be factored in. She's not really into 
tinkering as much as I. :-) And I to no longer have as much free time 
for this as I used to. :-(
I can't see why I can't run a commercial protocol and/or my own 
protocols alongside each other. It all appears to be Ethernet-based 
these days.



Hadley Rich wrote:

On Mon, 20 Apr 2009 11:25:40 Brett Davidson wrote:
  

Tie in to Linux - I would prefer that this be Linux (via embedded or
not) control as I want as little proprietary content as possible.



As of late I've been playing with sensors and control here. I've been using 
Arduino boards for input/output and Zigbee wireless or ethernet as 
communication back to a Linux server for smarts.


Using various devices such as PIR/temperature/current/switches as sensors and 
this morning I've received some solid state relays to do some switching of 
mains devices. Still very much in the tinkering phase.


I also looked at CBUS, KNX and the ELK M1 briefly but like you wanted something 
more open and also like to do things myself.


hads
  



--
Regards,

Brett Davidson
Systems Engineer
RHCE, CCNA, MCSE, SCSA, NZCE, TC(Electronics)

--
Net24 Limited
Phone: 0800 5000 24 | DDI: +64 3 962 9518 | Web: www.net24.co.nz
--

// web hosting / email hosting / data backup / VPS

This transmission is for the intended addressee only and is confidential
information. If you have received this transmission in error, please
delete it and notify the sender.



Re: Home Automation Dealers in Chch?

2009-04-22 Thread Robert Fisher
On Thursday 23 April 2009 15:05:51 Andrew Sands wrote:
> With thanks to the other contributors, I;ll suggest the following;

Some good advice has been given in this thread but I will give some opposite 
thoughts.

I am a sparky by trade so I know how to run cables and conduits and draw 
wires/strings.

I have built 4 houses (for ourselves) and in each one "wired it for the 
future".

Worked well in each case for me but if you have a wife who thinks you should 
make money on the exercise and sell up and do it all over again you may find 
that the new owners (or prospective buyers) couldn't care less which meant 
that we had not added any market value.

The same applied on the first house we built (15 years ago) with ceramic taps - 
even the land agents at that time didn't know of the benefits.

If you are planning to stay in the house for a while go for the best or at 
least add the conduits and/or draw strings.

That my 2 cents worth.

Rob


Re: Home Automation Dealers in Chch?

2009-04-22 Thread Ross Drummond
On Thu, 23 Apr 2009, Craig Falconer wrote:
>Stuff about inatalling networking in new dwelling.

Does the PDL LexCom home networking solution appeal? 

I understand that it a relatively expensive, but it does provide an 
intergrated data, telphone, TV solution. Go to;

http://www.pdl.co.nz/functions-nav.aspx?id=80

You need to download the PDF brochure (warning, 2.8Mb file) to get a good 
overview of this product.

Another thing that is worthy of consideration is whether to install ducts from 
your boundary to the house. This gives you a future proof means of upgrading 
over a plain services trench. It is not a cheap solution so you would 
probably need to get the go ahead from your wallet before proceding.

I have been reliably informed that a bloke desiring domestic harmony would be 
well advised to place stuff such as patch panels UPS's switches, servers etc 
in an out of the way place such as the garage, rather than scattered around 
the house.

Cheers Ross Drummond




Re: Home Automation Dealers in Chch?

2009-04-22 Thread Craig Falconer

Andrew Sands wrote, On 23/04/09 15:06:
As the electrician has a legal (and moral) responsibility for 
the installation...


Get an electrician who knows something about comms cabling too.  Just 
because J Random Muppet can weild dikes doesn't mean they have a clue 
about data.


(having just returned from a renovation site where the electrician 
didn't know what a hardwired ADSL splitter was.)


Or get somewhere like Cablecraft involved.

--
Craig Falconer



Re: Home Automation Dealers in Chch?

2009-04-22 Thread Andrew Sands
On Mon, 20 Apr 2009 11:25:40 Brett Davidson wrote:
>
> Tie in to Linux - I would prefer that this be Linux (via embedded or
> not) control as I want as little proprietary content as possible.
>

And here in lies yours biggest problem, there would be no off of the shelf 
control device available in New Zealand that fulfils your criteria. Secondly, 
do you ultimately want to possibly on sell your property. If the answer is to 
this question is yes, then stop now!

With thanks to the other contributors, I;ll suggest the following;

How far through with the build are you. just planning, builder, 
sub-contractors and architect selected? Have any of the people you are 
planning on utilising had any experience with "building control" systems? 
Ensure that the electrician you select is open to your input and not 
completed close minded.

I trust you understand that anything you try to implement that deviates from a 
normal building contract will add to your costs.

From the previous posters, they have given some good advice including;

Install plenty of Cat6 to everywhere. (Should all be dual runs but the only 
recommendation for Cat 6 would be to have it professional terminated and not 
by your electrician. Get it tested properly at time of install.) 
Put in draw wires for future use. I'd agree with this only in partially filled 
cable conduits, dragging in additional cables after the fact mostly causes 
more problems than it solves.
Run some 100 mm conduit to every building on the property. If this is done 
properly, ensure easy access to this infrastructure where it exits the 
building, to allow expansion of additional items. Remember that mains voltage 
cables and extra low voltage cables need to be segregated. See note above 
about Electrician.

And plenty of power points and power capacity. Actually power capacity affects 
power points so be careful with your planning, I speak from experience as I 
discovered after the fact that my mains cable connection to my house was not 
16 millimetre squared as I had 'presumed" but the imperial equivalent to ten 
millimetre squared.
A separate circuit for each room is handy too. This is a given as the purpose 
of any automation must be the control of electrical loads. ie (loud stereos, 
televisions, and hair straighteners.)
Electrically isolate the kitchen/laundry/AC/heatpump/HWC/bathroom from all the 
other rooms. Again this is the best planning but you need to ensure your 
electrician understands why and provides you with real reasons as to why it's 
not a good idea. I have some war stories about real world situations where 
the electrician made changes to a professional lighting design because it had 
too many lights and would use a lot of cable.

Documentation, documentation. This idea is pretty good to. And photograph all 
the rooms to see where the cable runs are, before putting up the gib boards. 
Keep a printout of these photos handy whenever you call in a builder/workman 
for anything in the future.
Did I say lots of documentation.

There was also a comment raised about the size of your switchboard. Again, you 
have plenty of design options and decisions to make here and the working 
relationship you have with your electrical contractor will make or break the 
entire project. As the electrician has a legal (and moral) responsibility for 
the installation the design and fabrication of the switchboard to easily 
allow for the purpose of 'automation' (control) will require his/her buy in 
to your ideas. 

Shout out if you'd like any further discussion. If so we could take it off 
list and on down to a drinking establishment.

Andrew





Re: Home Automation Dealers in Chch?

2009-04-20 Thread Volker Kuhlmann
On Mon 20 Apr 2009 11:49:04 NZST +1200, Craig Falconer wrote:

> Lots of Cat6 to everywhere.
> Put in draw wires for future use.
> Run some 100 mm conduit to every building on the property.
>
> And plenty of power points and power capacity.
> A separate circuit for each room is handy too.
> Electrically isolate the kitchen/laundry/AC/heatpump/HWC/bathroom from all 
> the other rooms.

All extremely good advice! Every single point of it. Make sure your
switchboard is big enough, I suspect you'll find a 30-way too small (I
do). Kick the electrician(s) early, otherwise you get el-cheapo.

Keep in mind that the conduits for data cables must be different to the
conduits for power cables. Only solution is to double up.

There are 4-way wall outlets available from PDL which fit a standard
flushbox and the space of a double outlet. Easy way to get more outlets
in a tidy manner.

Personally I'd make sure to be able to run everything I want to run
without any wireless. For a lot of home automation you'll need actual
wires too. Treat wireless as optional, but don't depend on it. You can
always go wireless, but not the other way round.

Volker

-- 
Volker Kuhlmann is list0570 with the domain in header
http://volker.dnsalias.net/ Please do not CC list postings to me.


Re: Home Automation Dealers in Chch?

2009-04-19 Thread Jim Cheetham
2009/4/20 Hadley Rich :
>> equipment directly onto 802.11*.
>
> Except if you want to take advantage of PoE :)

Two words - "Nikola Tesla"

Stand well back ...

http://www.youtube.com/watch?v=qEG-1iYpgKU&feature=PlayList&p=8CA8FCF8FF240590&playnext=1&playnext_from=PL&index=16

-jim


Re: Home Automation Dealers in Chch?

2009-04-19 Thread chris bayley

Brett Davidson wrote:
A long long time ago (in a galaxy near us however) Andrew Errington 
and John Carter corresponded about Home Automation in Christchurch.


Andrew appeared to use dedicated microcontroller chips and John was 
pondering about X10 at that time (July 2007).


I am building a new house at present and am looking at what control 
systems are out there worth considering implementing as this will help 
me what and where I should pre-wire and where I can use IR or 
bluetooth, etc. I want to do it all - switch audio/video along with 
control of appliances and monitoring of energy usage, etc.


There's CBus, Qnet, Emax, and a whole host of others with wildly 
optimistic promises hence I wondered what (if any) experience people 
on this list had in the real word.


Tie in to Linux - I would prefer that this be Linux (via embedded or 
not) control as I want as little proprietary content as possible.


Cheers,
Brett.
There is an article on home automation in this month's Linux 
journal..


: )



Re: Home Automation Dealers in Chch?

2009-04-19 Thread Hadley Rich
On Mon, 20 Apr 2009 12:10:17 Jim Cheetham wrote:
> Otherwise you'll always have multi-socket bars hanging
> around. However only one cat6 for data per room should be sufficient,
> as wireless gets more reliable and commonplace you can operate most
> equipment directly onto 802.11*.

Except if you want to take advantage of PoE :)

hads
-- 
http://nicegear.co.nz
New Zealands Open Source Hardware Supplier


Re: Home Automation Dealers in Chch?

2009-04-19 Thread Jim Cheetham
2009/4/20 Craig Falconer :
> Lots of Cat6 to everywhere.
> Put in draw wires for future use.
> Run some 100 mm conduit to every building on the property.

And photograph all the rooms to see where the cable runs are, before
putting up the gib boards. Keep a printout of these photos handy
whenever you call in a builder/workman for anything in the future.

> And plenty of power points and power capacity.

Yes -- a builder will give you around 4 power points per room. Up that
to at least 10! Otherwise you'll always have multi-socket bars hanging
around. However only one cat6 for data per room should be sufficient,
as wireless gets more reliable and commonplace you can operate most
equipment directly onto 802.11*.

> A separate circuit for each room is handy too.

Ideal if you need to show a teenager who is in control of the house
*cough* no electricity in your room after 11pm!!

> As for actual automation stuff... I have no idea.

Mmm. Ditto :-)

-jim


Re: Home Automation Dealers in Chch?

2009-04-19 Thread Hadley Rich
On Mon, 20 Apr 2009 11:25:40 Brett Davidson wrote:
> Tie in to Linux - I would prefer that this be Linux (via embedded or
> not) control as I want as little proprietary content as possible.

As of late I've been playing with sensors and control here. I've been using 
Arduino boards for input/output and Zigbee wireless or ethernet as 
communication back to a Linux server for smarts.

Using various devices such as PIR/temperature/current/switches as sensors and 
this morning I've received some solid state relays to do some switching of 
mains devices. Still very much in the tinkering phase.

I also looked at CBUS, KNX and the ELK M1 briefly but like you wanted something 
more open and also like to do things myself.

hads
-- 
http://nicegear.co.nz
New Zealands Open Source Hardware Supplier


Re: Home Automation Dealers in Chch?

2009-04-19 Thread Craig Falconer

Brett Davidson wrote, On 20/04/09 11:29:
I am building a new house at present and am looking at what control 
systems are out there worth considering implementing as this will help 
me what and where I should pre-wire and where I can use IR or bluetooth, 
etc. I want to do it all - switch audio/video along with control of 
appliances and monitoring of energy usage, etc.
There's CBus, Qnet, Emax, and a whole host of others with wildly 
optimistic promises hence I wondered what (if any) experience people on 
this list had in the real word.


Lots of Cat6 to everywhere.
Put in draw wires for future use.
Run some 100 mm conduit to every building on the property.

And plenty of power points and power capacity.
A separate circuit for each room is handy too.
Electrically isolate the kitchen/laundry/AC/heatpump/HWC/bathroom from 
all the other rooms.



As for actual automation stuff... I have no idea.


--
Craig Falconer



Re: Home Automation Dealers in Chch?

2009-04-19 Thread Brett Davidson
A long long time ago (in a galaxy near us however) Andrew Errington and 
John Carter corresponded about Home Automation in Christchurch.


Andrew appeared to use dedicated microcontroller chips and John was 
pondering about X10 at that time (July 2007).


I am building a new house at present and am looking at what control 
systems are out there worth considering implementing as this will help 
me what and where I should pre-wire and where I can use IR or bluetooth, 
etc. I want to do it all - switch audio/video along with control of 
appliances and monitoring of energy usage, etc.


There's CBus, Qnet, Emax, and a whole host of others with wildly 
optimistic promises hence I wondered what (if any) experience people on 
this list had in the real word.


Tie in to Linux - I would prefer that this be Linux (via embedded or 
not) control as I want as little proprietary content as possible.


Cheers,
Brett.


Re: Home Automation Dealers in Chch?

2007-07-16 Thread Andrew Errington
On Tue, 17 Jul 2007 13:18, you wrote:
> On Tue, 17 Jul 2007, Andrew Errington wrote:
> > Ha ha.  Good luck.
>
> Somehow I'm not feeling encouraged.
>
> > Perhaps what you really want is an ethernet enabled mains switch.
>
> A bank of those would be nice. Amongst other things I have a washing
> machine where the clock is dying and the replacement will cost lots.
>
> >  After all, you do have Cat5e everywhere in your house, don't you?
>
> The wife keeps whinging about tripping over it, the duct tape on the
> floor and the holes.

I installed mine under the floor, and put faceplates on the walls in the 
rooms where I wanted sockets.  All wired back to a patch panel in the hot 
water cupboard.

> > Another alternative is the Dallas one-wire bus.  There are 'switch'
> > nodes that you could connect (via optoisolators, natch) to a mains
> > relay (or modified Arlec doodad).
>
> Sigh! The PHB's of the world keep saying how marvelous the hardware
> types are with their reusable components...the hardware guys are so
> way ahead of software etc. etc.
>
> They haven't actually gone to hardware catalogue on the web and tried
> to find a component that will a) match an electrical & mechanical
> spec, b) has a known price c) is in stock.

I find that Maxim have a chip for pretty much anything you might want to 
do.  Go to www.maxim-ic.com and have a look.  You can get free samples 
there too- I suggest the one-wire thermometer DS18B20 or DS18S20, because 
it's interesting, and the one-wire switch, DS2413, because it's what you 
want.  Build an interface (DS9097, buy or build, Google is your friend) and 
have a play.

Actually, I've just noticed the DS28EA00, a combined temperature sensor and 
programmable I/O.  Ooh, shiny!

> It all just seems to be way harder than it should be.

It's so like the Man.

Here's some inspiration for you:
http://www.bwired.nl/
http://www.awe.com/ha/

Have fun.

Andrew


Re: Home Automation Dealers in Chch?

2007-07-16 Thread John Carter

On Tue, 17 Jul 2007, Andrew Errington wrote:


Ha ha.  Good luck.


Somehow I'm not feeling encouraged.


Perhaps what you really want is an ethernet enabled mains switch.


A bank of those would be nice. Amongst other things I have a washing
machine where the clock is dying and the replacement will cost lots.


 After all, you do have Cat5e everywhere in your house, don't you?


The wife keeps whinging about tripping over it, the duct tape on the floor and 
the holes.


Another alternative is the Dallas one-wire bus.  There are 'switch' nodes
that you could connect (via optoisolators, natch) to a mains relay (or
modified Arlec doodad).


Sigh! The PHB's of the world keep saying how marvelous the hardware
types are with their reusable components...the hardware guys are so
way ahead of software etc. etc.

They haven't actually gone to hardware catalogue on the web and tried
to find a component that will a) match an electrical & mechanical
spec, b) has a known price c) is in stock.

It all just seems to be way harder than it should be.




John Carter Phone : (64)(3) 358 6639
Tait ElectronicsFax   : (64)(3) 359 4632
PO Box 1645 ChristchurchEmail : [EMAIL PROTECTED]
New Zealand



Re: Home Automation Dealers in Chch?

2007-07-16 Thread John Carter

On Mon, 16 Jul 2007, Mike Pearce wrote:


What type of home automation are you wanting to do??

There will be a range of Zigbee devices available in NZ
soon, and I hope to release a cheaper range of MiWi
products in the New Year - basic Lighting control, Motor
control (Curtians), Power on/off etc.


All of the above... but controlled from Linux PC.

John Carter Phone : (64)(3) 358 6639
Tait ElectronicsFax   : (64)(3) 359 4632
PO Box 1645 ChristchurchEmail : [EMAIL PROTECTED]
New Zealand



Re: Home Automation Dealers in Chch?

2007-07-16 Thread Mike Pearce
What type of home automation are you wanting to do??

There will be a range of Zigbee devices available in NZ 
soon, and I hope to release a cheaper range of MiWi 
products in the New Year - basic Lighting control, Motor 
control (Curtians), Power on/off etc.

Mike


On Monday 16 July 2007 20:12, John Carter wrote:
> I feel like I've stepped out of the Dilbert animation and
> I half expect Dogbert to appear and use my ego as a punch
> bag...
>
> I'm looking at home automation gadgets something in the
> line of X10.
>
> (No...not the sleazy wireless cams of the universally
> hated pop-under ads.
>
> Yes, I also have been ignoring everything with the
> characters X10 for too long now. I mean the home
> automation signalling over powerline protocol called
> X10.)
>
> http://www.x10.co.nz/
> http://www.homecontrol.co.nz/
>
> Some questions for the group:
>
> 1) Any (recommended)? dealers in Chch?
>
> 2) X10 seems to have the attitude you will control things
> from a remote or from a CM12
> http://www.homecontrol.co.nz/CM12.htm
> I want all that stuff out of my way and just control
> these devices directly (and cheaply) from my linux box.
> What's the cheapest PC to X10 interface?
>
> 3) Is X10 the way to go? Or is there something cheaper /
> better? Given that microcontrollers with all the
> interfaces + ram + flash you require are under a dollar a
> piece, X10 seems unreasonably expensive.
>
> Thanks,
>
>
> John Carter Phone : (64)(3)
> 358 6639 Tait ElectronicsFax   :
> (64)(3) 359 4632 PO Box 1645 Christchurch   
> Email : [EMAIL PROTECTED] New Zealand


Re: Home Automation Dealers in Chch?

2007-07-16 Thread Andrew Errington
Ha ha.  Good luck.

X10 is not bad, but it has its problems, mostly that you cannot query the 
state of a node.  I am also not sure as to its availability here.  It was 
very cheap in the US, but of course, only suited to the US power supply.

I keep toying with the idea of Home Automation but there are two things 
that stop me:

1) The Man is keeping me down with his legislation preventing me from doing 
my own home electrical work.  (and yes, I know what I am legally permitted 
to do, but it's not sufficient).
2) There is no hardware to be had in NZ (apart from the expensive systems 
from Clipsal et. al.)

So, my last idea involved the Arlec remote controlled outlet kit that I got 
in Bunnings for $30.  I have mentioned it on-list before, but basically it 
comprises three plug-in modules with an electrical socket (much like a 
plug-in timer) and a handheld remote with 6 buttons in three groups of two. 
 Each pair of buttons turns the corresponding module on or off.

Because it is wireless, it works all around the house- no need for 
line-of-sight (cf. IR).

Anyway, my plan was to dismantle the outlet modules, install a PIC, and 
hard-code the unit address (so I can have more than three) and hack the 
transmitter so it can be controlled by a PC.  It still lacks the important 
function of querying the device to ascertain its state however.

Perhaps what you really want is an ethernet enabled mains switch.  After 
all, you do have Cat5e everywhere in your house, don't you?  This will 
allow two-way communication to the node, which can turn outlets on or off, 
and report their state.  It could have a new protocol using UDP for raw 
control/query, and an embedded web server in the node for casual 
interrogation.

Another alternative is the Dallas one-wire bus.  There are 'switch' nodes 
that you could connect (via optoisolators, natch) to a mains relay (or 
modified Arlec doodad).  This is simpler than ethernet, with the added 
advantage that you don't need a local power supply (nodes are powered by 
the bus).  The PC interface is easy to build, and you string the sensors 
off a multi-drop twisted pair (Cat5e is great for this).

There are also several home automation projects on the Intarweb- but no one 
stands out as the ideal.

HTH,

Andrew

On Tue, 17 Jul 2007 12:12, you wrote:
> I feel like I've stepped out of the Dilbert animation and I half expect
> Dogbert to appear and use my ego as a punch bag...
>
> I'm looking at home automation gadgets something in the line of X10.
>
> (No...not the sleazy wireless cams of the universally hated pop-under
> ads.
>
> Yes, I also have been ignoring everything with the characters X10 for
> too long now. I mean the home automation signalling over powerline
> protocol called X10.)
>
> http://www.x10.co.nz/
> http://www.homecontrol.co.nz/
>
> Some questions for the group:
>
> 1) Any (recommended)? dealers in Chch?
>
> 2) X10 seems to have the attitude you will control things from a remote
> or from a CM12 http://www.homecontrol.co.nz/CM12.htm
> I want all that stuff out of my way and just control these devices
> directly (and cheaply) from my linux box. What's the cheapest PC to X10
> interface?
>
> 3) Is X10 the way to go? Or is there something cheaper / better? Given
> that microcontrollers with all the interfaces + ram + flash you
> require are under a dollar a piece, X10 seems unreasonably expensive.
>
> Thanks,
>
>
> John Carter Phone : (64)(3) 358 6639
> Tait ElectronicsFax   : (64)(3) 359 4632
> PO Box 1645 ChristchurchEmail : [EMAIL PROTECTED]
> New Zealand


Home Automation Dealers in Chch?

2007-07-16 Thread John Carter

I feel like I've stepped out of the Dilbert animation and I half expect
Dogbert to appear and use my ego as a punch bag...

I'm looking at home automation gadgets something in the line of X10.

(No...not the sleazy wireless cams of the universally hated pop-under
ads.

Yes, I also have been ignoring everything with the characters X10 for
too long now. I mean the home automation signalling over powerline
protocol called X10.)

http://www.x10.co.nz/
http://www.homecontrol.co.nz/

Some questions for the group:

1) Any (recommended)? dealers in Chch?

2) X10 seems to have the attitude you will control things from a remote or from 
a CM12
   http://www.homecontrol.co.nz/CM12.htm 
I want all that stuff out of my way and just control these devices directly (and cheaply) from

my linux box. What's the cheapest PC to X10 interface?

3) Is X10 the way to go? Or is there something cheaper / better? Given
that microcontrollers with all the interfaces + ram + flash you
require are under a dollar a piece, X10 seems unreasonably expensive.

Thanks,


John Carter Phone : (64)(3) 358 6639
Tait ElectronicsFax   : (64)(3) 359 4632
PO Box 1645 ChristchurchEmail : [EMAIL PROTECTED]
New Zealand