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The Twilight Sentinel system uses a photoelectric cell to measure ambient light levels. This cell is typically mounted on the dashboard of the vehicle. [7] The system is designed to activate the vehicle's exterior lights when the ambient light falls below a certain threshold, typically corresponding to twilight conditions.
FMVSS 108 is codified in Title 49 of the Code of Federal Regulations Part 571, Section 108. [1] The most recent version was published by NHTSA for comment in December 2007, [2] and since then, it has been amended in April 2011, [3] August 2011, [4] January 2012, [5] December 2012, [6] December 2015, [7] February 2016, [8] and February 2022.
An automotive night vision system uses a thermographic camera to increase a driver's perception and seeing distance in darkness or poor weather beyond the reach of the vehicle's headlights. Such systems are offered as optional equipment on certain premium vehicles. The technology was first introduced in the year 2000 on the Cadillac Deville. [1]
QuickCam is a line of webcam video camera products originally produced by Connectix in 1994 and acquired by Logitech in 1998. Although its picture quality would today be considered primitive, it was the first widespread used webcam-like device.
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The following is a list of vehicles that feature hidden headlamps (also called pop-up headlights). [1] The vast majority of hidden headlamps are on cars, however, there are a handful of vehicles included in the list that do not fit this category. These include motorcycles, buses and trains.
Headlight flashing might have come into more common use as a means of attempting driver-to-driver communication by the mid-1970s, [3] when cars began to come with headlight beam selectors located on the steering column—typically activated by pulling the turn signal stalk—rather than the previous foot-operated pushbutton switches.
The difference between Program mode and Full Auto mode is that in program mode, only the exposure is automatic, while other camera settings (e.g. shooting mode, exposure compensation, flash) can be set manually; in Full Auto mode, everything is automatic.