Animal Surveillance/Detection

[jagil19]

There is also a company called Glolab @ glolab.com that sell PIR modules as
well as they have shcenmatics that you can DL and are based on the LM324..
They will have all you items in stock and are good ppl to deal with...
A Glolabs Co. Satisfied customer...

"JP" <shr...@iafrica.com> wrote in message
news:39b7e...@news1.mweb.co.za...
> I am a beginner looking to take on what is probably a very ambitious
> project. I am a wildlife enthusiast looking for unusual photographic
> opportunities. As this is a hobby, I have limited time for it. Therefore I
> have to get the most out of that time. To help me detect wildlife quickly
I
> need an electronic device of some kind. I guess sound, movement, or heat
> signature would work. Mostly I operate in daylight, but the device needs
to
> work also at night.
>
> On a limited budget I cannot afford expensive surveillance-type equipment,
> so I thought of building my own. Can anyone help with ideas on the type of
> device I need, and with plans for building same? I live in Southern Africa
> ... if that helps.
>
> Thanks in advance.
> Jean-Pierre
>
>
>

[Bruce Clothier]

jagil19 <jag...@earthlink.net> wrote in message
news:E3Fz5.18795$nk3.9...@newsread03.prod.itd.earthlink.net...

> There is also a company called Glolab @ glolab.com that sell PIR modules
as
> well as they have shcenmatics that you can DL and are based on the LM324..
> They will have all you items in stock and are good ppl to deal with...
> A Glolabs Co. Satisfied customer...

REPLY:

A PIR detector is a reasonable idea , but it does depend on the size of the
animal and the size of your back garden. I'm experimenting myself at the
moment intrying to detect a cat with a PIR in my back garden.
Glolab do indeed publish a circuit for a PIR detector. The circuit is almost
identical to the RS circuit ( avialable from RS free I think ) Beware; both
published circuits contain
typographical errors which make them non-functional!
If youre any good at electronics, building one is straightforward, but my
advice is to
reject the LM324 because the wiring-up is unnecessarily difficult. Use a
LM358 for the amplifier stage plus two separate LM741 ( very cheap ) for the
window detector. The
layout is much simplified.
Good luck
Bruce