Re: simple alarm system ideas?
From: Tamar Solutions (James_at_REMOVEMEtamarsolutions.co.uk)
Date: 09/01/04
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Date: Wed, 1 Sep 2004 18:40:53 +0100
"Spork" <sdfasdg@erw.com> wrote in message
news:m1jZc.7320$3l3.7160@attbi_s03...
> hello. I would like to install a very simple alarm system. I've been
> reading
> a little about the professional models online and they have to many
> features
> and most have very poor documentation for a beginner.
>
> I was thinking of something simple like magnetic contacts on all exterior
> doors wired to a piezo buzzer by my headboard.
>
> I'm assuming I would use normally open contacts wired in parralell then
> wired in series with a piezo buzzer? Do I need resistors or anything else?
>
> I realise the alarm would cease if the wires were cut or the door was shut
> but it would be enough to wake me up and hopefully startle the thief.
>
> My other question is can those radio shack surface mount contacts be used
> on
> a steel door with foam core without using some kind of stand off? I've
> heard
> you can and cant so I dont know what I should do.
>
> I appreciate any other ideas. im just learning about electronics so I want
> to keep it simple.
>
> thanks
>
>
>
I also would be interested on how to link this system up to a computer for
logging etc of movement.
thanks
JJ
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