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August 18, 2019

Old Cameras That Are Used As Nightlights

A nightlight is a small light fixture, often electrical, placed for comfort or convenience in dark areas or areas that may become dark at certain times, such as in an emergency. Small long-burning candles serving a similar function are referred to as teal lights.
People often use nightlights for the sense of security which having a light on provides, and for a solution against nyctophobia (fear of the dark). Besides their usefulness to children in the allaying of their fears, nightlights are also useful to the general public by showing the general layout of a room without turning on a major light, for avoiding tripping over stairs or obstacles, or to mark an emergency exit. Exit signs often use tritium in the form of a traser.
There are a wide variety of electrical nightlights. Most based on incandescent bulbs have a power usage of less than 10 watts; lights based on more efficient technologies, such as electroluminescence, neon lamps, or LEDs, use one watt or less. They sometimes have a light-sensitive component (such as a photo resistor) which activates them only when it is dark enough for them to be required or activate automatically in dark weather. Some include an integrated rechargeable battery so that the light will continue to function during power outages.








New Mini USB Cameras From Japan

A camera is a device that records and stores images. These images may be still photographs or moving images such as videos or movies. The term camera comes from the camera obscura (Latin for “dark chamber”), an early mechanism for projecting images. The modern camera evolved from the camera obscura.
Cameras may work with the light of the visible spectrum or with other portions of the electromagnetic spectrum. A camera generally consists of an enclosed hollow with an opening (aperture) at one end for light to enter, and a recording or viewing surface for capturing the light at the other end. A majority of cameras have a lens positioned in front of the camera’s opening to gather the incoming light and focus all or part of the image on the recording surface. The diameter of the aperture is often controlled by a diaphragm mechanism, but some cameras have a fixed-size aperture. Most 20th century cameras used photographic film as a recording surface, while the majority of new ones now use an electronic image sensor.
The still camera takes one photo each time the user presses the shutter button. A typical movie camera continuously takes 24film frames per second as long as the user holds down the shutter button, or until the shutter button is pressed a second time.
From its inception, the camera has been instrumental in the recording of still images from then-present surroundings, and further modifications led to the development of motion picture sequences in the late 19th century.




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