really? does there HAVE to be dust or something? I mean what is MOTION detection anyway? Sight? Light? based? movement of AIR? motion, but WHAT is detected?
really? does there HAVE to be dust or something? I mean what is MOTION detection anyway? Sight? Light? based? movement of AIR? motion, but WHAT is detected?
Some of them are temperature change motion. I think the myth busters used a glass sheet to defeat one.
Some of them are temperature change motion. I think the myth busters used a glass sheet to defeat one.
I wonder about air pressure. Is ambient air pressure measurable within a certain fixed area with current (recent) instrumentation technology?
I wonder about air pressure. Is ambient air pressure measurable within a certain fixed area with current (recent) instrumentation technology?
It's not really a new technology but it's called a barometer.
It's not really a new technology but it's called a barometer.
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