Re: OFFLIST Re: Occupancy detection

["Simon Coates" <ecolume@xxxxxxx>]

Nigel,

I've sold them at a special price to people on the group at £29.50 + VAT
each.  However, they're quite expensive if you compare them with standard
security PIRs, but they are for a specialised market and the
pyro sensor used is very sensitive and expensive.

They come with 2 core screened cable attached - approx. 1.0m.  The screen
is
used as the ground wire with the other 2 cores being 12V and open collector
output.  You can connect the output directly to HomeVision's Port B (or
Expansion board Port 1) inputs, since the HV inputs are connected to 5V via
a 2.7 ohm resistor the PIR 'output' will pull this down to ground.

I only have approx 10 left in stock and, under the circumstances, I'm
uncertain if I'm likely to get any more as standard stock.

As for the small detectors I've not made any of these yet - I've had a lot
of delays as you can imagine :o(
I can't foresee making any of them in the very near future.  I was in the
process of making the tooling for the mounting bezel, but lost everything
in
the factory fire.  Also, I haven't finalised the circuit design yet.

The basic spec for the small PIRs will probably be as follows:

Very small size - the detector head is just 12mm in diameter
Feedback LED - switchable ON/DIM/OFF
Onboard voltage regulator for 5V to 30V supply voltage
Open collector output switching 50mA @ 50V approx
Miniature terminal block

I would envisage that they would be priced approx £35+VAT


Regards


Simon


----- Original Message -----
From: Nigel Giddings <nigel.giddings@ukonline.co.uk>
To: <ukha_d@yahoogroups.com>
Sent: 25 January 2004 21:55
Subject: RE: [ukha_d] Re: Occupancy detection


> Simon,
>
> I've been looking for something like this. Can you provide more
details,
> a picture ? Costs etc...
>
> Thanks
>
> Nigel
>
> -----Original Message-----
> From: Simon Coates [mailto:ecolume@xxxxxxx]
> Sent: 25 January 2004 18:16
> To: ukha_d@yahoogroups.com
> Subject: Re: [ukha_d] Re: Occupancy detection
>
> Stephen,
>
> A 'traditional' PIR is the type used for security purposes and is
> designed
> to minimise false alarms - ie. by having pulse counting etc...
> An occupancy sensor is much more sensitive as it is designed to detect
> slight movements of a person in a room.  For example, sitting at a
desk
> or
> sat on a sofa watching TV etc...
>
> The occupancy detectors I've supplied to people on the group in the
past
> are
> recessed ceiling mounted detectors.  They require a 12V DC supply 1mA
> (not
> including load) and have an open collector output rated at 40V max
25mA
> -
> and can be directly connected to HomeVision, Comfort etc.. The
coverage
> is
> 360 degrees and the detection pattern is 3 concentric 'rings' - 14
> concentrated zones in the centre, 24 zones from about 1m to 2m then 24
> zones
> from 2m to 3m radius (when mounted at normal ceiling heights).
>
> I've also been working on some tiny occupancy detectors that were
based
> on
> the Matsushita PIR (very small and very sensitive) unfortunately I cut
> off
> the ends of 3 fingers a few months ago and that's put me behind on a
lot
> of
> other things - also the factory burnt down just before Christmas and I
> lost
> most of my equipment and stock :o(  Just call me lucky !!!
>
> However I have some of the original PIRs if you are interested.
>
> Regards
>
>
> Simon Coates
>
>
> ----- Original Message -----
> From: Stephen <yahoo@stephenorme.freeserve.co.uk>
> To: <ukha_d@yahoogroups.com>
> Sent: 25 January 2004 17:55
> Subject: Re: [ukha_d] Re: Occupancy detection
>
>
> > On Fri, 16 Jan 2004 22:43:45 -0000, you wrote:
> >
> > >Go here http://www.ukha-archive.com/cgi-bin/namazu.cgi?
> > >query=ecolume+pir+occupancy
> > >
> > >The "ecolume" occupancy PIRs do work a treat, a few
of us have
> > >them.  Well, I had them in my last place, and will have them
again.
> >
> >
> > Hello,
> >
> > Please can I ask what is the difference between a
"traditional" pir
> > and an ocupancy detector? From what I have "overheard"
here, a
> > standard pir will trigger when it detects movement, but it seems
that
> > an occupancy detector is much more sensitive, and will trigger on
much
> > smaller movements. Thjis would be great to automate lights,
because
> > with a normal pir, if you stop walking the lights would go off,
but it
> > sounds as if an occupancy detector would keep the lights on.
> >
> > How do you connect an occupancy detector? Do they switch 240v ac
or
> > 12v dc? Does their output remain high as long as movement is
detected?
> >
> > The only one I have found is in screwfix but it only has a 90
degree
> > range. Are there any with better ranges; for automating room 
lights
> > really 360 degrees would be best.
> >
> > What is the url of rapid? It is such a common word, that google
has
> > given me many false positives.
> >
> > Thanks,
> > Stephen.
> >
> > UK Home Automation Meet 2004 - BOOK NOW!
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> >
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