Computer control

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Hi
At secondary school, we had BBC Master computers connected by some sort of serial port to a box to which devices or relays could be connected.
The box had a series of nodes with live and neutral connectors, and the circuit could be either opened or closed using the computer.
Does anyone know of a modern version of this. Perhaps something that can be controlled through Windows or Linux ?
Thanks
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Most modern buildings now have automated control of heating and lighting via Ethernet. Shedloads of companies now produce network switches and controllers for use in such situations and are now cheap enough to be used in domestic situations. As they are based on TCP/IP over Ethernet they can easily be controlled via the internet if necessary.
Dave
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via
I didn't know that.

Are you able to suggest any names?

Hmm. Although *safely* opening your BMS network to the Internet might be less than trivial...
Will
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used
Echelon Corporation AMX Corporation Crestron Electronics, Inc. Andover Controls Vantage ACS American Auto-Matrix Applied Digital, Inc Blue Earth Research Chalmor Limited Computrols, Inc. Delta Controls, Inc. Dimax Controls Energy Control Technologies Excel Energy Technologies, Ltd. FieldServer Technologies H I Solutions, Inc. Protect Controls, Inc. Reliable Computer Systems Ltd Richards Zeta Vantage Walker Systems Corporation
To name but a few.

Not really a problem with appropriate encryption and other security interlocks.
Dave
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<http://www.quasarelectronics.com part num 3108KT in kit form, AS3108 assembled. You'll also need a (12v 500mA?) wall wart.
--
Tony Williams.

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Tony Williams wrote:

Looks like an excellent company.
An alternative for controlling mains appliances is the X10 series of devices. You can use the PC to program and monitor pretty much any mains light or device over RF or mains cabling, either directly or stand alone. As usual it all comes down to budget. http://www.letsautomate.com http://www.simplyautomate.com
--
Toby.

'One day son, all this will be finished'
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Toby wrote:

I found this link recently, and it seems quite useful.
http://diy-zoning.sourceforge.net /
Steve
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In an earlier contribution to this discussion,

Could you check this link please - my DNS server can't resolve the address!
--
Cheers,
Set Square
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wrote:

It works OK.
This is not a beginner's project, though. :-)
.andy
To email, substitute .nospam with .gl
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Set Square wrote:

No probs here(from blueyonder). FWIW domain resolves to 66.35.250.209 (projects.sourceforge.net) if I run a tracert.
--
Chris
-----
Spamtrap in force: to email replace 127.0.0.1 with blueyonder.co.uk
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In an earlier contribution to this discussion,

Thanks! I tried it later and it was ok - must have been a temporary glitch somewhere.
--
Cheers,
Set Square
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wrote:

I'm going to make a point of avoiding X10 since they've decided to start spamming me over the last couple of weeks...... -- cheers,
witchy/binarydinosaurs
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wrote:

As
X10 and X10 are NOT the same thing.
X10 is a spec for home automation X10 is also the name of a spamming camera zoom firm thing...
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On Sun, 21 Dec 2003 10:33:38 -0000, "NorwichLad"

Ah, right. Fairy snuff :)
-- cheers,
witchy/binarydinosaurs
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wrote:

mains
alone.
Ah yes but the camera gizmo has an 12v power supply that is turned on and off using X-10 protocols with the video and audio being an rf transmission. They are intended to be used with several cameras transmitting on the same frequency to one receiver, but only the one camera being powered up at one time. Incidently although they respond to standard X-10 signals their implementation is slightly specialised in that tuning on any unit turns off all the other units sharing the same 'house code' (X-10 uses up to 16 'house codes' and 16 'unit codes' thus giving up to 16 x 16 = 256 items under control)
Andrew Mawson
(Who's morning bedroom kettle turns on using X-10 to make the tea !)
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NorwichLad wrote:

Yes, but, "X10-spamming bastards" are also the major suppliers of X10 protocol stuff.
X10 protocol is very largely out of patent, (it was invented by a scottish company in the late 70s) and you can "roll your own" in the finest traditions of UK.D-I-Y if you have access to the right bits (and quite a lot of bytes....)
Steve
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News,
The 8 zones of my central heating are controlled via opto-isolators from the parallel port of a PC running an application I wrote using TurboPascal. You must be aware when starting down this track that the later (Win 98 onwards) versions of Windows do their level best to keep you away from directly talking to ports so you have to do a bit of fiddling arround with .ocx 's
(It also keep track of Electricity and Water consumption, and regen cycles on the water softener, and acts as my portal onto the internet via adsl)
Andrew Mawson
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You don't say what this is used for, but for some uses, X10 mains-born signalling devices might be convenient, and there's a serial interface module designed for connecting to a PC (and a number of software packages to drive it, for Windows and I think Linux too).
--
Andrew Gabriel

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If you were intending using a dedicated PC for this, why not use an Acorn A5000 instead? You'll get one for free or very little easily, and it's ideal for this application - indeed many are still used for machine control. They're built like tanks and go on for ever.
--
*A person who smiles in the face of adversity probably has a scapegoat *

Dave Plowman snipped-for-privacy@argonet.co.uk London SW 12
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Hmmph... that's exactly what I've been doing recently. Testing a small bank of industrial remotely controlled power supplies, with an old A5000. As you say, just the job for that sort of thing. Umm.... except that the HD of some A5000's can be a little tired and replacements are hard to come by (was it an ST506 HD).
--
Tony Williams.

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