Re: Some dumb questions

[stuart noble <stuart.dot.noble@xxxxxxxxx>]

On Jun 10, 5:03=A0am, Jim <alarmi...@xxxxxxx> wrote:
> On Saturday, June 9, 2012 3:20:17 AM UTC-4, stuart noble wrote:
> > On Jun 8, 8:32=A0pm, "Bob La Londe" <n...@xxxxxxxx> wrote:
> > > "stuart noble" <stuart.dot.no...@xxxxxxxxx> wrote in message
>
> > >news:e441768b-dadc-4d1c-8688-69e2942d882e@xxxxxxxxxxxxxxxxxxxxxxxxxxxx=
...
>
> > > > On Jun 8, 6:14 pm, "Bob La Londe" <n...@xxxxxxxx> wrote:
> > > >> "stuart noble" <stuart.dot.no...@xxxxxxxxx> wrote in message
>
> > > >>news:1577734d-551b-4ce5-b71f-e9e05bcc5855@xxxxxxxxxxxxxxxxxxxxxxxxx=
om...
>
> > > >> > Hi All
> > > >> > I'm looking to install a domestic wireless system consisting of =
just
> > > >> > three shock sensors and an external sounder. I obviously need so=
me
> > > >> > kind of control panel, but only to turn it on or off. I don't ne=
ed it
> > > >> > to send text messages or any of that stuff. I can see plenty of
> > > >> > choices for the shock sensors, but do I have to stick to the sam=
e
> > > >> > company for the control panel? Any advice welcome
>
> > > >> Heck, you don't need a control panel. =A0Just a switch of some kin=
d, a
> > > >> power
> > > >> supply, and a relay if you plan to operate a sounder.
>
> > > > A bit over my head technically.Ideally I need standard off the shel=
f
> > > > stuff. Would this fall into that category? Thanks for your prompt
> > > > reply, most helpful.
>
> > > Yes. =A0Its all standard off the shelf stuff. =A0If you can figure ou=
t how to
> > > use a switch to cut power to a circuit, and how to use an output to t=
rigger
> > > a relay to activate something else you can do this.
>
> > > The big questions is what do you want your "shock sensors" to do?
>
> > The house in question has double patio doors at the back, which
> > burglars have forced in the past, and are likely to do again. =A0There
> > is also a back/kitchen door that is vulnerable. The front of the house
> > is overlooked by neighbours opposite, so unlikely to be a target, but
> > I would put the third sensor on the front door to be on the safe side.
> > It seems logical to have the alarm go off before entry rather than
> > wait till they've trashed the doors
>
> Double patio doors. Sliding glass doors or french doors? =A0If using dire=
ctly applied shock sensors, how do you intend on attaching the sensors to t=
he slider or the opening doors? Are you aware of door cords or take-off blo=
cks (not recommended) Probably not. However, it sounds as if using and inst=
alling an audio glass break detectors might be beyond you scope of knowledg=
e. To use an audio glass break detector without a control panel, you'd have=
 to be able to lay out a powered circuit using a relay, a power supply, a s=
ounding device and an on off switch. If that is not a project you feel up t=
o, I'd suggest that you bite the bullet and hire an alarm company to instal=
l a simple alarm control, keyswitch and glass break detector for you. Proba=
bly on cost you a few hundred .... depending upon where you're located.
>
> Not to be a smart ass but .... do both you and your neighbors spend a lot=
 of time looking at each others houses? I've heard this excuse for not doin=
g the front of a house for decades. I don't know how much time you have on =
your hands but I don't believe I spend as much as five minutes a day lookin=
g at any of my neighbors homes.

These are French doors. Come to think of it, they were prised open at
the bottom with a crowbar or similar, so possibly a straightforward
door contact would trigger the alarm before a shock detector?
This is my son's house and there isn't a "few hundred" going spare
right now. We will contact some local alarm companies but I think it's
going to be a cheap off the shelf wireless or nothing. It's not the
sort of house that's going to interest serious burglars, and I suppose
you're relying on the presence of a siren to deter the low level
scrotes that visited last time