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Hi Graham
Im thinking of doing exactly the
same thing for the same reason in the near future .I currently
have
an ir setup (homebrew) and can have up to 8 different zones ,although
i
use only three .To use it on HomeVision i think only 3 port pins would be
required. The ir leds have only 2 connections 1: signal 2: return .Ive
had
a quick read of Ian Birds post and that would be a easier way to
do it
if you only require 4 zones which should be ample .
Frank Mc
----- Original Message -----
Sent: Thursday, April 25, 2002 11:05
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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