DIY Alarms/PIRs/Cats
On Monday, 2 April 2018 20:16:27 UTC+1, Bill Wright wrote:
On 02/04/2018 06:19, Brian Reay wrote:
I was discussing fitting a burglar alarm with my son-in-law and the
problem of their cat occurred to me.
While they could confine the cat to a room not covered by a PIR, the
layout of their house would make this far from ideal in a number of ways.
I can't believe I'm the first person to think about this problem- what
to the millions of people with cats/dogs do?
(Obviously not using PIRs is an option but the idea of wires etc to
window / door sensors really isn't practical. A few PIRs will 'cover'
the required rooms and I think there are routes for wiring, if we can't
find a wireless solution.)
I used point-to-point active infra-red beams when I did an alarm job for
a mate. I disguised the tx and rxs. It worked fine.
Bill
Ditto. A largely outdated technology, but work well enough if the beam covers the main walkway and ideally includes a door that never blows shut. Can be a good approach where PIRs would be no good.
NT
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