RE: Sending and receiving addressable contact closures.

["Keith Doxey" <ukha@xxxxxxxxxxx>]

And write up the idea for the AutomatedHome competition BEFORE the end of
the month to stand a chance of winning a WebBrick :-)

> -----Original Message-----
> From: Mike Griffiths [mailto:mike@xxxxxxx]
> Sent: 25 April 2005 15:59
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Sending and receiving addressable contact
> closures.
>
>
>
> Isn't this a job for a WebBrick?
>
> http://www.o2m8.com/
>
> I would give the design guys a phone
>
> Mike
>
>
>
> ________________________________
>
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf
> Of Alan Ainslie
> Sent: 25 April 2005 13:17
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] Sending and receiving addressable contact closures.
>
>
>
>
> Some clever guy on our group must know the answer to this.  I have
been
> looking in all the wrong places I guess.:-
>
> I need to send instructions to a number of switches to close or open:
> accessed by address.
>
> I also need to read the status of other switches as inputs.
>
> This is all ON/OFF so no proportionality and I do not want to use a
PC,
> but
> am happy to make up a central controller and then to make up the
devices
>
> that go onto the control bus.  Ideally control bus would be two wires
> plus
> the heavy 12V supply to power relays and things.
>
> Anyone any ideas for chip set to do this robustly and economically.
> Devices
> will be outdoors.  Everything is 12V only.  Numbers?  Less than 50 of
> the
> addressable switches and less than 20 of the input contacts closures.
>
> Application?  Well, almost an automated home: in truth this is to
> control
> signals and to read status of various devices on a 7 1/4 gauge large
> steam
> railway located-----in an automated home.
>
> Any railway nuts out there welcome to a day on the Spinney light
Railway
> in
> Surrey.  Fully signalled at present using authentic 1930s railway
> technology.  new stuff is for a large extension and I really don't
want
> to
> be running more miles of cables for the mice to eat.
>
> Alan
>
>
>
>
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