Re: Can some kind electronics bod help?

["Frank Mc Alinden" <armagh@xxxxxxx>]

    Hi Paul


> What I want to do is take up to 6 IR outputs from the HomeVision
> expansion board (which I have) and feed each one into each of the
6
> zones of the custom amp (at the amp in node0 by connecting in
parallel).
> This way I can directly 'inject' IR into the Kustom system without
> having to fit an IR emitter (driven by HV) at each of the Kustom
wall
> controllers (the wall controller has an emitter and receiver built
in).

What i have mentioned before regarding Homevision ir out refers to the
ir
jack on the Homevision unit........I believe the expansion board ir
outputs
uses open collector (uln280?)   outputs which is ov switching..
You could
still use optos but they cost around $8.00 Aussie each ....Surely there is
a
connection diagram for the kustom keypads on your multizone amp ?? Any
connection diagrams at all??

Frank

----- Original Message -----
From: "Paul S. Gale" <groups@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Tuesday, February 04, 2003 11:36 PM
Subject: RE: [ukha_d] Can some kind electronics bod help?


> Thanks guys.
>
>
>
> Yes - it seems that the Kustom amp is based on 5V IR signals - how
could
> I tell for sure without a scope? Would a digital multimeter give
an
> accurate enough reading on the IR lines? (or should the IR output
from
> the wall controller be the same voltage as the supply voltage?)
>
>
>
> What I want to do is take up to 6 IR outputs from the HomeVision
> expansion board (which I have) and feed each one into each of the
6
> zones of the custom amp (at the amp in node0 by connecting in
parallel).
> This way I can directly 'inject' IR into the Kustom system without
> having to fit an IR emitter (driven by HV) at each of the Kustom
wall
> controllers (the wall controller has an emitter and receiver built
in).
>
>
>
> As both Kustom and HV seem to use 5V, should I just try it without
any
> electronics? Given they're both 5V could I do any damage? Is all
this
> talk of transistors not needed as both systems run at 5V?
>
>
>
> Unfortunately I don't have any diagrams of the Kustom system - I
could
> ask their tech support guys but I don't think they'd release
anything.
>
>
>
> Paul.
>
>
>
> -----Original Message-----
> From: Frank Mc Alinden [mailto:armagh@xxxxxxx]
> Sent: 04 February 2003 11:05
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] Can some kind electronics bod help?
>
>
>
> Hi Shane
>
>            
Im making assumptions.. that Paul is trying to get HV tx ir
> signal onto some sort of  tx bus on the Kustom system and that
the
> Kustom
> system is 15v (misread this one... its actually the ocelet thats 15v
)
> ....
>
> >Been writing Perl code instead of laying out a PCB
> > :-)
>
> 3 zone amplifier ;-)) ?????
>
> Frank
>
> ----- Original Message -----
> From: "Shane Harrison" <shane.harrison@xxxxxxx>
> To: <ukha_d@xxxxxxx>
> Sent: Tuesday, February 04, 2003 9:54 PM
> Subject: RE: [ukha_d] Can some kind electronics bod help?
>
>
> > Hi Frank,
> >
> > I thought that the IR is unidirectional from HV to Kustom. 
I also
> > gleaned that the Kustom System used 5V inputs.  Did you mean
Kustom or
> > Ocelot when you wrote:
> >
> > "The impression i get is that the Kustom System tx voltage
is
> > 15v ( circuit diagram would be nice) . The resistor i assume
> > is to limit the drive current.."
> >
> > Agree that the opto is the safest way to go - of course I guess
it
> means
> > he needs a source of 5V on the Kustom side from somewhere unless
it
> has
> > internal pullups.
> >
> > Anyrate off to bed !  Been writing Perl code instead of
laying out a
> PCB
> > :-)
> >
> > Cheers
> > Shane
> >
> > > -----Original Message-----
> > > From: Frank Mc Alinden [mailto:armagh@xxxxxxx]
> > > Sent: Tuesday, 4 February 2003 9:44 p.m.
> > > To: ukha_d@xxxxxxx
> > > Subject: Re: [ukha_d] Can some kind electronics bod
help?
> > >
> > >
> > > Hi Paul / Shane
> > >
> >
>                        
Like Shane when i read your post it
> > > wasnt very clear (to me anyhow)..............
> > >
> > > Homevision switches +5v out when transmitting......via a
75
> > > ohm resistor....
> > >
> > > The impression i get is that the Kustom System tx voltage
is
> > > 15v ( circuit diagram would be nice) . The resistor i
assume
> > > is to limit the drive current..
> > >
> > > Personally i would use a high speed opto (this is what i
use
> > > on HV / FirM ) setup  to connect between Homevision and
the
> > > Kustom mutlizone sysytem..Then both systems are
completely
> > > isolated from each other..The Homevision side is easy
would
> > > need more info on the Kustom side though...
> > >
> > > Frank
> > >
> > > ----- Original Message -----
> > > From: "Paul S. Gale" <groups@xxxxxxx>
> > > To: <ukha_d@xxxxxxx>
> > > Sent: Tuesday, February 04, 2003 7:06 PM
> > > Subject: RE: [ukha_d] Can some kind electronics bod
help?
> > >
> > >
> > > > Thanks Shane.
> > > >
> > > >
> > > >
> > > > The Ocelot bit is just a red herring (it was what
the
> > > original poster
> > > > had - I don't have one). I'm hoping that HomeVision
(which
> > > I do have)
> > > > is the same in/output wise and can be used in it's
place.
> > > >
> > > >
> > > >
> > > > What I'm querying is what value resistor should be
used, how it's
> > > > connected and what for.
> > > >
> > > >
> > > >
> > > > The problem stemmed from the 'Kustom' amp not
liking
> > > standard IR input
> > > > from other IR distribution systems (Zantec included I
think). The
> > > > poster found that if the output from his Ocelot (or
other
> > > system) was
> > > > connected via a transistor, it would work. Something to
do with
> the
> > > > voltages involved and the transistor acting as a
switch?
> > > >
> > > >
> > > >
> > > > Now, I don't know what the output voltage of HomeVision
is when
> > > > sending IR - it maybe that it will work straight off
with
> > > the Kustom
> > > > Amp - but I didn't want to risk it :-) The Kustom amp
needs 5V
> > > > apparently according to this guy.
> > > >
> > > >
> > > >
> > > > Does this make any more sense?
> > > >
> > > >
> > > >
> > > > Thanks,
> > > >
> > > >
> > > >
> > > > Paul.
> > > >
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: Shane Harrison
[mailto:shane.harrison@xxxxxxx]
> > > > Sent: 04 February 2003 07:43
> > > > To: ukha_d@xxxxxxx
> > > > Subject: RE: [ukha_d] Can some kind electronics bod
help?
> > > >
> > > >
> > > >
> > > > Hi Paul,
> > > >
> > > > I don't think we are ignoring you :-) we are just
confused ?
> > > >
> > > > >From my electronics experience (albeit limited) the
explanation
> > > > >doesn't
> > > > seem to make much sense.
> > > >
> > > > More information on what the Kustom input looks like
i.e. internal
> > > > pullup on input or not.
> > > >
> > > > More information on the Ocelot's output. I am not sure
if level
> > > > translation and logic inversion is required or just one
of them ?
> > > >
> > > > Maybe I am simply not smart enough - but I tried
answering those
> > > > questions from the circuit description and it just
didn't
> > > make sense -
> > > > sorry.
> > > >
> > > > Shane
> > > >
> > > >
> > > > > -----Original Message-----
> > > > > From: Paul S. Gale [mailto:groups@xxxxxxx]
> > > > > Sent: Tuesday, 4 February 2003 4:18 a.m.
> > > > > To: ukha_d@xxxxxxx
> > > > > Subject: FW: [ukha_d] Can some kind electronics
bod help?
> > > > >
> > > > >
> > > > > I posted this a while back but no one wanted to
talk to me :-(
> > > > >
> > > > >
> > > > >
> > > > > Any thoughts?
> > > > >
> > > > >
> > > > >
> > > > > Paul.
> > > > >
> > > > >
> > > > >
> > > > > -----Original Message-----
> > > > > From: Paul Gale [mailto:groups@xxxxxxx]
> > > > > Sent: 25 January 2003 15:27
> > > > > To: ukha_d@xxxxxxx
> > > > > Subject: [ukha_d] Can some kind electronics bod
help?
> > > > >
> > > > >
> > > > >
> > > > > I'm trying to wire into my multi-source,
multi-zone amp (Kustom
> > > > > KHS6640). It has wall controllers that pass
through IR to
> > > the amp.
> > > > > To be able to control each zone from a central
location
> > > (or via HV,
> > > > > pronto etc), I need to 'tap' into Kustom's IR
system. I found
> > > > > someone on the web saying they'd done it by using
a
> > > transistor (see
> > > > > below). What I don't understand is how to add the
resistor as
> > > > > mentioned - what value should I use and where
should it be
> > > > > connected? Anyone understand this?
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Paul.
> > > > >
> > > > > ++++++++++++++++
> > > > >
> > > > > So I've finally gotten the Ocelot to control a
Kustom whole
> house
> > > > > audio system with no keypads.  All the credit
goes to my
> > > father, the
> > > > > real EE in the family, but hey, I did the
soldering.
> > > > >
> > > > > So, the problem is not modulation.  The
problem is that
> > > the Ocelot
> > > > > uses some sort of open collector (?) CMOS-based
output that,
> when
> > > > > measured against the Kustom's ground is 15V rather
than
> > > the 5V the
> > > > > Kustom wants, and not to mention that the
"steady state"
> > > voltage is
> > > > > 15V rather than 0.  So basically all I did
was hook up
> > > the IR to the
> > > > > emitter and base of a PNP transistor, and wire
the
> > > collector to pin
> > > > > 3 of the Kustom RJ-45 input.  Done.
> > > > >
> > > > > I'm putting a resistor in to make sure I don't
overpower
> > > the Kustom,
> > > > > but we're talking about $3 in parts compared to a
$99 keypad.
> > > > > Woohoo!
> > > > >
> > > > > Anybody wants some Kustom keypads let me know.
:)
> > > > >
> > > > > Thanks to the Ocelot folks for wiring diagrams
and
> > > assistance.  They
> > > > > continue to rock.
> > > > >
> > > > >
> > > > >
> > > > > ++++++++++++++
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > [Non-text portions of this message have been
removed]
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