Re: Small movement sensors ...

[Kevin Hawkins <lists@xxxxxxxxxxxxxxxxx>]

I have a sample of some really tiny PIR's here - made from the Napion
division of Panasonic I believe. I was looking at them for occupancy
detection a while back.  They are about the size of the end of a biro
cap but only 10mm long - with wires poking out the bottom.     They need
some more electronics adding as I believe they're just CMOS/TTL level
output and have other needs too. I can't just find the URL at the moment
but I'll keep looking if you're interested.
...found it

http://www.mew.co.jp/ac/e/control/sensor/human/napion/index.jsp

Re Sunlight - yes it can cause problems. Coincidently in a rare for me
'early' rising I noticed yesterday that my X10 external PIR was sending
continual triggers between around 6.30 and 8 AM - which is when the sun
rises and catches that corner .  Never seen this before as it's
logically timed in its actions to bring on the security floods during
darkness only, but in its new role as a 'visitor announcer' it will be
problematic.  There isn't a tree/bush in the way so I think it's direct
sun light only.

I also noticed in one of the Clipsal instructions for their external
'InfraScan' PIR's they specifically state that they must be sited so
that sunlight can't enter the sensor directly, including sunrise/sunset
or permanent damage may occur.   These are quite long range devices so
maybe that has a bearing.


Kevin

, Chris Hunter wrote:
> in the spirit of HA, before pointing the windows & french windows
of
> the new house, I ran large straws through the foam between 'frame
&
> wall, one each side, at about shoulder level ... now the pointing
> well on the way to being done, I have to decide what to do next !!
>
> so 'wondered if anyone knows of any small movement sensors ...  have
> to be small (aesthetics, plus the doors over outwards) ... PIRs,
> maybe ... or perhaps some sort of camera ...
>
> btw, do PIRs still work while being bathed in sunshine ?
>
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> Chris
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