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  2. Camera trap - Wikipedia

    en.wikipedia.org/wiki/Camera_trap

    A camera trap is a camera that is automatically triggered by motion in its vicinity, like the presence of an animal or a human being. It is typically equipped with a motion sensor —usually a passive infrared (PIR) sensor or an active infrared (AIR) sensor using an infrared light beam.

  3. Motorola Type II VOC - Wikipedia

    en.wikipedia.org/wiki/Motorola_Type_II_VOC

    IR sites are generally used for a small geographic area or to fill in holes. For sites that are used to fill in coverage traffic is very limited. To allow as limited a number of channels for use, and to be spectrum efficient, Voice On Control (VOC) was developed to permit the control channel to temporarily act as a voice channel. [ 1 ]

  4. Passive infrared sensor - Wikipedia

    en.wikipedia.org/wiki/Passive_infrared_sensor

    A PIR motion detector used to control an outdoor, automatic light. A camera trap with PIR motion detector. An indoor light switch equipped with PIR-based occupancy sensor [1] A PIR-based motion detector is used to sense movement of people, animals, or other objects. They are commonly used in burglar alarms and automatically activated lighting ...

  5. Gyrocam Systems - Wikipedia

    en.wikipedia.org/wiki/Gyrocam_Systems

    Gyrocam Systems has developed an extensive product line of camera systems that provide stabilized images from miles away, whether in air, on land, or at sea. [2] Since 2004, Gyrocam Systems has fielded well in excess of 500 mast-mounted vehicle camera systems to the U.S. military in both Iraq and Afghanistan.

  6. Amateur radio repeater - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_repeater

    An amateur radio repeater system consisting of a 70 cm repeater and a 2-meter digipeater and iGate. Coaxial cavity RF filter at 2 meter repeater An amateur radio repeater is an electronic device that receives a weak or low-level amateur radio signal and retransmits it at a higher level or higher power, so that the signal can cover longer ...

  7. Remote camera - Wikipedia

    en.wikipedia.org/wiki/Remote_camera

    A remote camera, also known as a trail camera or game camera, is a camera placed by a photographer in areas where the photographer generally cannot be at the camera to snap the shutter. This includes areas with limited access, tight spaces where a person is not allowed, or just another angle so that the photographer can simultaneously take ...

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