RE: HV IR Distribution Was Gurus brain required...

["Ian B" <Ian@xxxxxxx>]

With a worst case scenario of 64 emitters each pulling 30ma, that's, oh,
the
better part of 2 amps. Switching on and off up to 56000 times a second
or
more likely 38000 times a second. Hmmm, could be in for some power
supply
and cabling issues here.

Just a thought!!

Ian B


-----Original Message-----
From: andy_powell_is [mailto:ukha@xxxxxxx]
Sent: 28 May 2002 09:49
To: ukha_d@xxxxxxx
Subject: [ukha_d] HV IR Distribution Was Gurus brain required...



I've been having a serious think about this one and came up with the
following,

The solution should be a '2 box' one. One box would be the Homevision
IR Zoner the other would be the 'single to multiple emitter' box.

Why? Ok, well the Homevision box speaks for itself. The question is
would you want to build the 'single to multiple emitter'  that
only
ever worked with Homevision? The answer has to be no. The single-to-
multiple-emitter box could be made to perform the same functions for
a number of IR sources. The HV IR zoner is effectively one source,
but what if you wanted to use the single-to-multiple-emitter box with
comfort..a new design?

So here is the idea.

HV Zoner box

1 x  3.5mm mono Jack for IR in (from Homevision)
8 x 3.5mm mono Jack for IR out - to either emitters or to the single-
to-multiple-emitter box

design as per http://groups.yahoo.com/group/ukha_d/files/HVIR.jpg


IR Distribution (single-to-multiple-emitter box)

8 x 3.5mm mono jacks from IR input box (eg HV Zoner)
64 x 3.5mm mono jacks for IR emitters - split into 8 zones of 8
outputs (i.e. each one of the 8 inputs  emmits on 8 of the
outputs.

If homevision was outputting on all 8 zones could it cope?

The IR distribution box mut be able to cope with ALL 64 emitters
firing but should not affect the input box (eg HV Zoner) - Seperate
PSU? (as per Ians message?)

Perhaps this could be integrated with Ian's or Nigel's IR circuits
too to give Zone control from a remote location...

I thought if this were a more generic design then it would appeal to
more people...

Anyone got any thoughts/ideas?

Andy



--- In ukha_d@y..., "andy_powell_is" <ukha@b...> wrote:
> --- In ukha_d@y..., "i.bird@t..." <Ian@M...>
wrote:
> >
> > If I have made any glaring errors then point them out to me.
If
you
> need a piccy it will have to wait as I am at work and not
working!!!!
> >
> Ian,
>
> errmm.. piccies, circuit diagrams, parts-list and a healthy dose
of
> assistance are what is needed.. :P ... I haven't a clue what you
just
> said (apart from the Opto-isolate thingy - which I *think* means
that
> it would protect Homevision from my absent minded bungling...)
>
> So, any help you can offer would be greatly appreciated... this is
my
> first real project (I've messed about with Basic stamps) and I
> thought it was going to be easy :( :(
>
> Andy



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