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A proximity sensor is a sensor able to
detect the presence of nearby objects without any physical contact.
A proximity sensor often emits an electromagnetic or electrostatic
field, or a beam of electromagnetic radiation (infrared, for
instance), and looks for changes in the field or return signal. The
object being sensed is often referred to as the proximity sensor's
target. Different proximity sensor targets demand different
sensors.
Peter Farkas posted a video
Peter Farkas posted a blog post© 2012 Created by Danny.
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