On Mon, 15 Jan 2007 19:36:52 +0000, Zak wrote:

Is it possible to get an alarm which sounds if the catch of my briefcase
is opened while I am out of the room during a meeting?

I use a soft briefcase like this one:
http://www.crouchandfitzgerald.com/i...cts/hs756p.jpg

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My thoughts so far:

When I have to leave my case unattended maybe I could loop a thin
enamelled wire over some part of the catch so that the wire would get
snapped when the catch was undone. It's not a great way and I'm looking
for something better.

Could some sort of window-catch burglar alarm (with a contact and a magnet
or whatever) be used?

Inside the case I would need a portable but loud alarm sounder which would
respond to a broken circuit. Are there any off-the-shelf products which
would do this?

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It depends on what you're trying to do. If you only want to *prevent*
someone opening your briefcase just fit a lock.

On the other hand if you want to catch someone in the act then you could
probably adapt a car door courtesy switch with battery and buzzer (see
www.maplin.co.uk) to do the job.

A more subtle approach might be to treat your briefcase with one of those
invisible powders which can only be seen by ultra violet light / special
glasses. Anyone handling your briefcase would have stained hands and you
would be able to see the culprit.


Cic.


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