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Occupancy sensor types include: PIR sensors, which work on heat difference detection, measuring infrared radiation.Inside the device is a pyroelectric sensor which can detect the sudden presence of objects (such as humans) who radiate a temperature different from the temperature of the background, such as the room temperature of a wall.
The time switch can be programmed to turn on or off a connected device at specific times or according to a set schedule. For example, a user could program the time switch to turn on the lights at a certain time in the morning and turn them off at night, or to activate a heating system at a specific time before the user arrives home from work.
This separation helps the motion detector to discriminate between field-wide illumination and moving objects. When a person walks from one angle (beam) to another, the detector will only intermittently see the moving person. This results in a rapidly changing sensor signal which is used by the electronics to trigger an alarm or to turn on lighting.
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Announced by Sony on August 24, 2011, and launched alongside its brother the Sony Alpha 77, [1] the Sony Alpha 65 is the top-tier for Sony's midrange Alpha SLT camera line.. The Sony Alpha 65 does not have a direct predecessor like the Sony Alpha 77 but it is still considered a replacement for the Sony Alpha 700 with less high-end specifications compared to its siblings.
The following is a list of Bravia television products manufactured by Sony. In 2005 they discontinued their previous "WEGA LCD" line, and all Sony televisions are now known as Sony Bravia. Starting in 2013, the model year is encoded in a letter of the alphabet, so all 2015 models have a letter "C" in their name.
Any application that supports shortcut keys can be controlled via infrared remote controls from other home devices (TV, VCR, AC). [44] This is widely used [citation needed] with multimedia applications for PC based home theater systems. For this to work, one needs a device that decodes IR remote control data signals and a PC application that ...
A mercury switch is an electrical switch that opens and closes a circuit when a small amount of the liquid metal mercury connects metal electrodes to close the circuit. There are several different basic designs (tilt, displacement, radial, etc.) but they all share the common design strength of non-eroding switch contacts.