RE: Sat on a Toilet Sensor ?

["Neil Wrightson" <neilw@xxxxxxxxxx>]

Hi,

About an air pressure sensor switch. I.e. you can buy switches that are
quite sensitive and active by air pressure via a hose fitting.
Run a say 6mm diameter PVC or silicon hose with one end blocked off, on the
under side of the seat and have the other end connected to
the air pressure switch. When the person sits on the seat, this compresses
the air and triggers the switch.
This allows the switch and electrical connections to be placed in a more
favourable environment.

Neil.

-----Original Message-----
From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx]On Behalf Of
Marcus Warrington
Sent: Wednesday, 11 July 2007 11:29 PM
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Sat on a Toilet Sensor ?


Peter,

Light level sensor in the bowel... mmmm... don't fancy having to wire
that one up...sounds like a Hazardous environment to me.

Following on from your suggestion of pressure pad/strain gauges fitted
to the seat.. I'm thinking that *may* a wireless door bell bottom could
be fixed under the seat with the receiver unit behind the wall, much
better than having to run wires around the bowl..I guess it would just
be a case of adjusting the "tension" of the button spring so that
the
weight of the seat alone didn't activate it.

Marcus

________________________________

From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf
Of Pete Church
Sent: 11 July 2007 13:02
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Sat on a Toilet Sensor ?

-----Original Message-----

One final off-the-wall suggestion, put an electrode on each side of
the toilet seat, when the person sits down they make the circuit and
you can use that signal to start the fan (a bit like the battery
testers that were fitted to the sides of some duracell batteries).

This could also have a secondary use - after a set time you could use
the
same electrodes to give a quick shock to remind you that you've been
sitting
there for just over 2 hours.

Other options for switching could include: a light level sensor in the
bowl
combined with a proximity sensor to confirm that someone is sitting down
(wouldn't work at night so well). Personally I'd use the load guage or
some
sort of pressure pad, but I'd fit them to the underside of the seat, as
the
sensitivity will be enhanced as the no-load setting will just be the
weight
of the seat. Something like: http://tinyurl.com/2bge96
<http://tinyurl.com/2bge96>

Cheers

Pete

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