Re: Can some kind electronics bod help?

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

Hi Paul

        The opto i use on FirM for the
ir signal is H11L1 from RS Components

Part number 585-292 (aussie catalogue) approx $8.00 each......

Just had a quick look through the Kustom manual....If im correct the
Kustom
Keypads KHS6640 have a built in ir repeater. ?? correct .........so the
ir
signal marked on the cat5 lead is ir tx  signal back to the Kustom
multi
zone amp.......
I will draw a schematic for 1 zone and email it to you direct.......

Frank

----- Original Message -----
From: "Paul S. Gale" <groups@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Wednesday, February 05, 2003 8:42 PM
Subject: RE: [ukha_d] Can some kind electronics bod help?


> Can you give me an example description or part number or something
for
> the opto - I can then have a look to see how much they are here.
>
>
>
> Also thinking about patching in IR to a zone that doesn't have a
wall
> controller fitted (master controller that controls all zones). Has
the
> same connection for a controller, it's just I'm not using one. Would
the
> opto route still work i.e. not connecting across the existing lines
but
> using it instead of a wall controller?
>
>
>
> Paul.
>
>
>
> -----Original Message-----
> From: Frank Mc Alinden [mailto:armagh@xxxxxxx]
> Sent: 05 February 2003 09:38
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] Can some kind electronics bod help?
>
>
>
> Hi Paul
>
> > Do I need to use an opto. The original poster used a simple
transistor
> -
> > will this not work as well?
>
> Im sure it would work but you need to know for sure what you are
> doing..Using the opto couplers will give electrical isolation
between
> the 2
> pieces of equipment....Two very expensive peices of equipment as
well
> ...
>
> Frank
>
> ----- Original Message -----
> From: "Paul S. Gale" <groups@xxxxxxx>
> To: <ukha_d@xxxxxxx>
> Sent: Wednesday, February 05, 2003 8:24 PM
> Subject: RE: [ukha_d] Can some kind electronics bod help?
>
>
> > Do I need to use an opto. The original poster used a simple
transistor
> -
> > will this not work as well?
> >
> >
> >
> > Paul.
> >
> >
> >
> > -----Original Message-----
> > From: Frank Mc Alinden [mailto:armagh@xxxxxxx]
> > Sent: 05 February 2003 07:25
> > To: ukha_d@xxxxxxx
> > Subject: Re: [ukha_d] Can some kind electronics bod help?
> >
> >
> >
> > Hi Shane
>
>                
On  the original post the guy mentions that the ocelet
> > has
> > open collector outputs and that the Kustom system  wqs
looking for 5v
> > signal..So Paul has the same problem..if an opto is used ..Tie
the
> > collector
> > to +5v via say 100 ohm resistor and connect the emitter to the
zone tx
> > line.....Some connection diagrams might help??
> >
> > Frank
> > ----- Original Message -----
> > From: "Shane Harrison"
<shane.harrison@xxxxxxx>
> > To: <ukha_d@xxxxxxx>
> > Sent: Wednesday, February 05, 2003 6:08 PM
> > Subject: RE: [ukha_d] Can some kind electronics bod help?
> >
> >
> > > See comments below
> > >
> > > > -----Original Message-----
> > > > From: Paul S. Gale [mailto:groups@xxxxxxx]
> > > > Sent: Wednesday, 5 February 2003 1:36 a.m.
> > > > To: ukha_d@xxxxxxx
> > > > Subject: RE: [ukha_d] Can some kind electronics bod
help?
> > > >
> > > >
> > > > 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?)
> > >
> > > If you are lucky and the Kustom input has an internal
pullup
> > > (essentially a resistor to the power rail) then the input
will sit
> at
> > > the power rail voltage when no signal is applied to
it.  If it has
> no
> > > internal pullup then pretty hard to tell with out scoping
the the
> > > existing IR signal being fed 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?
> > > If the HV expansion board is open collector as Frank thinks,
then
> you
> > > can't really do any damage if you connect them
together.  However
> with
> > > open collector outputs (essentially it is a switch to ground
only,
> > > either the output is grounded or not grounded (floating))
you need
> > > something to "pull" the signal up to a positive
voltage when the
> open
> > > collector "switch" is not switched to
ground.  This can be an
> external
> > > resistor (say 10K) or if you are lucky the Kustom has
internal
> pullups
> > > as discussed above.
> > >
> > > HTH (and makes sense)
> > >
> > > Shane
> > >
> > >
> > > http://www.automatedhome.co.uk
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