With this circuit you can
detect the presence of an
object from some distance away, depending on the sensitivity and the size
of the object. Very handy for detecting whether someone is on the other side
of a door without first having to open the door!
With this circuit you can
detect the presence of an
object from some distance away, depending on the sensitivity and the size
of the object. Very handy for detecting whether someone is on the other side
of a door without first having to open the door!
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You can, for example, use this circuit to detect
people, but you can also use it to detect the
presence or absence of the car in the garage.
It doesn’t matter whether the detected objects
moves or not, it only matters whether an
object is within a certain distance of the
sensor.
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