A different kind of motion sensing security light?

They can both be thin film - a point you're too thick to get!

This is a copy/paste of what I typed: " Freznel type lenses (special IR

Being "Freznel type lenses" they're obviously based on something that existed before PIR sensors. - the more you wriggle - the more you have to be disingenuous about what I actually said.

You're even too thick to snip what I actually said, so everyone can see you're making it up the things I never said!

One of the PIR sensor datasheets I read described them as such, It was many years ago that I worked for the alarm company that made the PIR alarms, I can't remember the part number and I've no idea if I still have those old datasheets.

But at least I've had actual hands on industrial experience - and not just swinging through the trees beating my chest.

You helped the DEA catch a lot of pot growers. ^_^

TDD

Ian worked for an alarm company alright... sitting in front of a monitor in a call center making cold calls trying to sell crap alarm systems... and believed the boilerplate he read off a script. ...Jim Thompson

A friend of mine worked for a local company that put together custom built electronics for a lot of different customers back in the 1980's. One of the projects was taking off the shelf video cameras and recorders built into a weatherproof package with a magnetic detector to video any unauthorized vehicles visiting coal mine sites. Law enforcement was also a customer for the item including another variation built into a fake pole mounted power transformer to be mounted outside the home of any sort of suspect. An anonymous unsuspicious bucket truck comes out and mounts the setup which actually draws power from the power line so there are no batteries. Makes you kind of wonder what sort of hidden cameras the spooks have hidden around your town. ^_^

TDD

So that explains your confused ranting!

Cell towers are ubiquitous in some areas; on buildings, towers, etc. I wonder if it is possible that 'dummy' antennas could operate as tempest monitoring stations. But otherwise, the degree of electronics miniaturization that has occurred means that it should be possible to manufacture spy-enabled passive components that could be relatively easily substituted in just about anything, and remember that things like TVs and such never really turn off.

I worry less about video surveillance than audio, but MEMS devices will eventually advance to the point where microscopic bugs will be able to crawl or fly into a residence and set up a fairly comprehensive spying network. All of which is an NSA/CIA wet-dream scenario, so they're probably working on it.

Regards,

Uncle Steve

I buy gear from Supercircuits Inc. and there are all sorts of covert cameras you can by from them. Good grief, the cameras in cellphones are so tiny you would expect them to be available as components to build any sort of surveillance system. The stuff Supercircuits sells would have been science fiction not that many years ago. ^_^

TDD

The schoolyard again