Re: Checking whether a TV is not on

["Adam Stevens" <adam@xxxxxxx>]

I'm almost too embarrassed to mention this!....

Although not an ideal solution by any means, I do use a very basic form of
"Is the TV on" by slipping a temperature sensor down the back of
the TV :-)
If it's significantly hotter than the air temperature in the room, then the
TV is on :-)

Of course it does take a little time to cool down (and warm up), so I
reall=
y
won't recommend it as a "instant status" device, but for my needs
(eg, "for
fun") it works quite well :-)

A.

---
HA Site: http://www.the-firs.org/=20


"Paul Gordon" <paul_gordon@xxxxxxx> wrote in message
news:<BAY1-F106OMa6K8rNlW0000b157@xxxxxxx>...
> I had one of these sensors on my TV for the last 4 years, and in all
that=
=20
> time, I could *never* get it to descriminate between fully on, and on
in=
=20
> standby, and even worse, it never actually detected the set being
switche=
d

> off by its hard on/off button on the front panel...
>=20
> The only thing it did detect was the set being switched off/unplugged
at
the=20
> wall socket....
>=20
> I wouldn't recommend this device for this application...
>=20
> I have heard mention before of various techniches for detecting the
on=20
> status of a TV, often involving using the headphone socket, or perhaps
a=
=20
> spare SCART socket... - presumably detecting the presence or otherwise
of
an=20
> audio or video signal, or maybe one of the SCART status pins... Keith
D
will=20
> know much more about what's possible with this approach....
>=20
> Paul G.
>=20
>=20
>=20
> >From: "Kevin Hawkins" <lists@xxxxxxx>
> >Reply-To: ukha_d@xxxxxxx
> >To: <ukha_d@xxxxxxx>
> >Subject: RE: [ukha_d] Checking whether a TV is not on
> >Date: Mon, 13 Oct 2003 13:12:17 +0100
> >
> >There are some current sensor type probes available that can tell
you vi=
a
a
> >'logic' type output whether any mains powered device is ON or OFF.
LA I
> >think do them as do the Comfort people - and I think maybe Xantech
??
> >
> >The mains cable needs dividing such that only one of the
conductors (liv=
e

> >OR
> >the neutral) passes through the sensor, which is a small
current=20
> >transformer
> >- (looks like a large polo mint).
> >
> >The sensitivity of the ONOFF sensing can be adjusted by how many
loops
of
> >the mains wire are made around the current transformer (polo
mint).  In=
=20
> >your
> >case of a device like a TV that always draws current (even in
standby)
you
> >will need to experiment such that it shows OFF in 'Standby' but
'ON' in=
=20
> >use.
> >I guess the sensors provide a spec as to what minimal current
turns them
to
> >the ON state (with a single wire pass through the sensor) - and
you coul=
d
> >check this against the current drawn in standby by your TV, which
must b=
e
> >less than this or the device would show ON permanently.
> >
> >	Kevin
> >
> >
> >
> >    > -----Original Message-----
> >    > From: Ian Tresman [mailto:ian@xxxxxxx]
> >    > Sent: 13 October 2003 12:03
> >    > To: AutomatedHome UK
> >    > Subject: [ukha_d] Checking whether a TV is not on
> >    >
> >    > There are X10 devices that will tell me whether a device
is on or=
=20
> >off.
> >    >
> >    > But is there anything that will tell me electronically
whether a T=
V

> >is
> >    > not
> >    > on, ie. off, or on standby?
> >    >
> >    > And then is there anything that will allow the remote
switching of
a=20
> >TV
> >    > (or
> >    > other device) to stand-by mode?
> >    >
> >    > Regards,
> >    > Ian Tresman
> >    >
> >    >   ----------
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