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[5] [6] For example, in an office a closed-loop photosensor can be positioned on the ceiling facing the desktops in order to detect the amount of light on the work surface, as placing the sensor on the desktop itself would be impractical. When sensors were placed on desktops in an office building, an penalty of 24% on energy saving occurred. [7]
The ambient light sensor of a Google Pixel 4a smartphone under a microscope. An ambient light sensor is a component in smartphones, notebooks, other mobile devices, automotive displays and LCD TVs. It is a photodetector that is used to sense the amount of ambient light present, and appropriately dim the device's screen to match it.
Drapes can optionally be automated with sensor-based electric motor controls that are aware of room occupancy, daylight, interior temperature, and time of day. Passive solar buildings with no central air conditioning system need control mechanisms for hourly, daily, and seasonal, temperature-and-daylight variations.
An optical sensor converts light rays into electronic signals. It measures the physical quantity of light and then translates it into a form readable by an instrument. An optical sensor is generally part of a larger system that integrates a source of light, a measuring device, and the optical sensor. This is often connected to an electrical ...
Longer days are ahead for most of North America as the clocks “spring forward” on Sunday, marking the beginning of daylight saving time. What to Know About How Daylight Saving Time Works in ...
When a lightning discharge occurs within a cloud at night, the entire cloud appears to illuminate. In daylight these intracloud flashes are rarely visible to the human eye; nevertheless, optical sensors can detect them. In early missions, astronauts used optical sensors to detect lightning in bright, sunlit clouds far below.
This year, daylight saving time will end on Sunday, Nov. 3, according to the Old Farmer's Almanac. The time change occurs at 2 a.m. local time on Nov. 3 rather than midnight as many may assume.
It’s that time of year again. On Sunday, Nov. 5, daylight saving time ends and we set our clocks back an hour. Even though we’re gaining an hour — and there tend to be more health risks ...
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