Idea for IR zoning with HV

["graham_howe" <graham@xxxxxxx>]

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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