Brian Gaff (Sofa) wrote

I don't see how you can have a pir that works that does not detect pets.

The better ones are multi mode which allows
rough detection of the size of the moving object.

It is after all just detecting changes in the heat radiation as something
moves across domains on the sensore one assumes.

Its more complicated than that with the best of them and there
is also where the moving object is in the field of view too.

Tho obviously that doesn’t work with a pet elephant or cow etc.

This would need some smarts to ignore certain profiles.

Not smarts so much as selective about what it observes field of view wise.

And smarts are obviously possible. The best surveillance systems allow
you to mark the parts of the image it should check for movement in
and the best systems even use facial recognition etc too and can work
out the difference between a human and a car etc. Tad radical I realise.

"Steve Walker" wrote in message
...
I currently have a security light on my garage (at the bottom of the
garden) and used both for security and simply to see my way to the garage
in the dark, but I need to add one to the shed next to it, as it is set
back and in darkness alongside, making it difficult to get there without
tripping over in the garden or stepping in puddles (very heavy clay soil).

Rather than two independent lights, I'd like to put a single PIR with
270° coverage on the corner of the garage and operate both together.

The existing light is a nuisance, as it is frequently triggered by cats.

I have looked for pet friendly, outdoor PIRs, but only seem to find
wireless ones that link into security systems. Has anyone seen a wired
version? Do I need to add protection to an indoor one instead?