Re: Idea for IR zoning with HV

["Alancc" <alan.cc@xxxxxxx>]

Seems to me the idea is sound although you normally only have two leads
on
the transmitters, its receivers that have three. You could switch one leg
of
the signal through a small relay connected to the output ports.

Alancc
----- Original Message -----
From: graham_howe <graham@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Thursday, April 25, 2002 2:05 PM
Subject: [ukha_d] Idea for IR zoning with HV


> I *think* I have an idea for achieving zoned IR distribution from
> HomeVision without an expansion board, but I would like to hear
> others opinions as I have very little experience with HV beyond
X10.
>
> The aim is to have HV send a specific IR signal to 1, some or
> all 'zones'. Specifically I want to control each of my 3 DDAR's
> independantly some of the time and synchronised sme of the time.
>
> As I understand it, an IR LED requires three wires (I am
deliberately
> being simplistic in terms of the electronics because I don't know
> much about it!), SIGNAL, +tve, -tve. So if SIGNAL comes out of the
> single HV IR output and into a Krone block, it can be split to
> multiple wires. The power (+tve presumably) could be controlled
> (switched) from other HV outputs, one for each zone.
>
> Macros would then be used to run the following sequence:
>
> - supply power to 1 or more zones
> - send IR signal to all zones
> - stop power to all zones
>
> The signal will of course have no effect at the IR LEDs that have
no
> power.
>
> This seems to give zoned IR without any additional hardware (other
> than the IR LEDs of course) and would certainly be much cheaper
than
> expansion boards or dedicated distribution blocks.
>
> So what does everyone think, and even better, would someone like
to
> have a go at prototyping this (I have zero time available at the
> moment).
>
> Regards
>
> Graham
>

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