Re: KAT5 AV Links

[Keith Doxey <keith.doxey@xxxxxxx>]

That sounds OK to me.
The reason I suggested including the blank box was that the box is only a
couple of quid but to actually get one yourself would add about 3-5 pounds
in P&P charges making it a very expensive box.

I am actually planning an InWall version that would fix directly into a
single gang box in the wall with a SCART socket in the faceplate. At this
point the design of the circuitry is finalised and tested but the actual
physical appearance is still open to change. I have been working on a word
document which describes the various designs I want to market and I will
post this on my website in the next 2 weeks.

All the stuff I have designed is to fill a gap that I see in the AV
distribution aspect of home automation. On comp.home.automation all the
Americans talk of putting in loads of heavy duty COAX (RG6) for RF
distribution and distribution of Line Level audio and Video in addition to
the CAT5 infrastructure for datacomms use.

When I originally wired my house 14 years ago I made the mistake of running
dedicated AV cables from A to B. Whilst these have been of great use over
the years, they are ONLY suitable for AV use and ONLY between A & B. At
work we have structured cabling with nearly 500 CAT5 sockets around our
demo area all running back to the comms rack. With my boxes we can put what
we want - where we want - when we want it - within 2 minutes. the biggest
benefit is that any one cable can be Voice, data, ISDN, video, VGA, CCTV
etc. and you only need CAT5 patch cables to hook it up.

That is the reason I designed the units as standalone black boxes although
if people prefer it to be a wall mounted faceplate then that is fine by me.
It does limit the flexibility of the system to a degree as that video link
is then permanently in that location. That is also my argument about the
use of telepone connectors on some of the wiring rather than RJ45 all
round. Once an outlet is fitted with a telephone socket it stays that way
until you get your tools out and change the socket.

I actually plan to install the interfaces into some of my equipment where
space and safety permit doing so. That way your CD player or TV just plugs
into an RJ45 on the wall and is super neat. The IR receivers and emitters
can also then be hidden inside the equipment as well. 	DO NOT ATTEMPT TO
MODIFY EQUIPMENT IF YOU DONT KNOW WHAT YOU ARE DOING !!!!!

As I said before, I am designing for a need that I personally see. Several
of you obviously see the benefits of what I am doing as you have expressed
great interest in getting your hands on the goods. I want to make sure that
i get it right. If what everyone really wants is a wall mounted unit then
that is what I will design for, but if most people want a black box
approach then that will be the first model with others to follow.

Now is the time for you to get your wishes built into the design before it
becomes a finished PCB. Likewise, what is the connector of choice? SCART,
Phono, S-Video

As Mark mentioned earlier there are well over 100 people on this list with
only a handful of people regularily voicing their opinions. What I am
trying to avoid is a situation where I design and market something based on
the few comments received so far only to be greeted by the silent majority
saying afterwards "well I wish it did....." or " it would be
better if...."

Keith

Keith Doxey
http://www.btinternet.com/~krazy.keith
Krazy Keith's World of DIY Home Automation

-----Original Message-----
From:	Nigel Orr [SMTP:nigel.orr@xxxxxxx]
Sent:	22 October 1999 10:57
To:	ukha_d@xxxxxxx
Subject:	[ukha_d] Re: KAT5 AV Links

At 23:12 21/10/99 +0100, you wrote:
>2.	Assembled PCB, undrilled box & instruction

A slight variation on 2 would suit me best.  Assembled PCB, no box at all,
or an order code for a recommended box.  I'm not trying to be awkward
(honest), but I can see that I might want different boxes in different
places.  What size is the PCB approx?  Would it fit in a standard, or
double electrical backbox?  That'd be _nice_.

Nigel
--
Nigel Orr                  Research Associate   O   ______
Underwater Acoustics Group,              o / o    \_/(
Dept of Electrical and Electronic Engineering     (_   <   _ (
University of Newcastle Upon Tyne             \______/ \(

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