Re: Motion Sensors

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

Hi Ian + Tony
                   
You can also use a 9v regulator and put 2 diodes in
series with the common terminal to ground ,this effectively "Jacks it
up "
to 10.2 -10.4 V . Ive done this whenever i need an odd voltage.

HTH

Frank Mc
----- Original Message -----
From: "Ian B" <Ian@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Saturday, August 10, 2002 6:00 PM
Subject: RE: [ukha_d] Motion Sensors


> Hi Tony
>
> Most regulators require a 3 volt gap between required and supply
voltage.
> Also 10 volts is not an off the shelf voltage. The solution would be
to
> build your own using something like a 15 volt power supply and then
an
> adjustable regulator to bring it down to ten.
>
> Of course a 12 volt supply with three diodes in series would do the
same
> job. A diode drops .6 volt so 3X.8 = 1.8    12 - 1.8 =
10.2 Close enough?
>
> This is the KISS principle in action. (Keep it simple stupid)
>
> I rewired my node 0 (well, James H did actually, I was moral
support)
> because of that same problem with lack of power sockets.
>
> Ian
>
> >-----Original Message-----
> >From: Tony T [mailto:tonyt@xxxxxxx]
> >Sent: 10 August 2002 07:26
> >To: ukha_d@xxxxxxx
> >Subject: Re: [ukha_d] Motion Sensors
> >
> >
> >> It is indeed 12 volts from a supply(ies) under the stairs
i.e. node 0.
I
> >use
> >> CAT5. It is doubled where necessary because of the current
draw but
that
> >is
> >> only one place. Keep an eye on the current per pair though. I
think
> >> something like 300 ma is the max. Double the pairs and almost
double
the
> >> current available. I have 1.2 amp supplies for the rooms
where the ring
> >> runs.
> >>
> >
> >Thanks Ian,
> >
> >I may stick to just building dc distribution at node 0 for now, as
this
is
> >where I have most of the dc gadgets at the moment.
> >I did see somewhere, can't find them at the moment, some pc
blanking
plates
> >with 4(?) dc outlets which you could switch the voltage on and
they draw
> >power from the pc psu. I think a couple of these may solve my node
0
power
> >problem (currently have a 6 gang outlet, plugged into another 6
gang
outlet
> >to get enough sockets at node 0), though I'll probably need to fit
a
better
> >psu.
> >
> >The one thing I cannot seem to find is a 10v regulated wallwart
supply
for
> >my wavefinder. But I guess I could use a 12v supply and use a
regulator(?)
> >to draw down to 10v?
> >
> >Thanks again,
> >Tony T
> >
> >
> >
> >For more information: http://www.automatedhome.co.uk
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> >
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> >
> >
>
>
>
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