RE: Sat on a Toilet Sensor ?

[ian.bird@xxxxxxxxxxxxxx]

Let me have a read of the pdf sheets. The other ultrasonic device I
was=20
comfortable with but with this I have no experience. I'll get back to
you=20
shortly.

Ian






"Marcus Warrington" <marcus.warrington@xxxxxxx>=20
Sent by: ukha_d@xxxxxxx
13/07/2007 14:41
Please respond to
ukha_d@xxxxxxx


To
<ukha_d@xxxxxxx>
cc

Subject
RE: [ukha_d] Sat on a Toilet Sensor ?






Yes, I think it would definitely need some form of "magic box" to
make=20
sense of its reading and flick a relay.

=20

At least  this would also allow the setup to have its trigger point=20
adjusted etc since I assume I would want quite a "large"
differential i.e.=
=20
not so sensitive, but its would be difficult to know for sure until=20
everything was in installed. I'm also unsure of just how sensitive these=20
units are..=20

=20

The toilet itself is held on the wall by two bolts that are connected to a=
=20
steel frame behind the panel. This frame is in turn bolted to the brick=20
wall behind. It might be easier/better if this gauge was blued to this=20
frame ?

=20

Anyway I'm glad the spec's made some sense to you... its all=20
gobble-de-gook to me..  do you fancy having a play with one.. I could=20
order one and have it delivered direct to you :-) If things looked=20
feasible we could then discuss "a private commission" :-)

=20

Regards

=20

Marcus=20

________________________________

From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of=20
ian.bird@xxxxxxx
Sent: 13 July 2007 14:17
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Sat on a Toilet Sensor ?

=20

I like the idea of the RS unit but it 'outputs' a differential
resistance=20
i.e. it changes with the strain (unless I miss read it in my haste).
This=20
means that it will require the usual micro somewhere in the middle to make=
=20

sense of the readings. It would give you the opportunity of saying 'my=20
toilets crashed' as you suffocate rather than just the usual server or
PC=20
gone west ;-)

Mind you, watching one of those 'you are what you eat' type of programs
a=20
while back they imply you can solve all your problems by avoiding the=20
Indian, Mexican etc. etc. plus lots of roughage. Not exactly HA though=20
(and probably not as enjoyable either).

Ian

"Marcus Warrington" <marcus.warrington@xxxxxxx <
mailto:marcus.warrington%40mis-es.com>
>=20
Sent by: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>=20
13/07/2007 13:12
Please respond to
ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>=20

To
<ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
>
cc

Subject
RE: [ukha_d] Sat on a Toilet Sensor ?

I tend to agree with you Ian.. that's why I think something like a
strain=20
gauge or load cell is a better solution, since its not connected to the=20
toilet itself, can be completely invisible and only activate upon
sitting=20
(well I suppose you could stand on the toilet).

Looking in RS (www.rswww.com <http://www.rswww.com/ <http://www.rswww.com/
> > ) part number 632-124=20
is a "Mild Steel foil strain gauage, 2mm gauage" cost =A35.09
each

Since the toilet is wall mounted with bolts through a 18mm MDF panel,=20
wonder if one of these mounted on the wooden panel would detect any slight=
=20

deflection of the panel when someone sat on the toilet ?

Marcus=20




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