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An early Xerox optical mouse chip, before the development of the inverted packaging design of Williams and Cherry. The first two optical mice, first demonstrated by two independent inventors in December 1980, had different basic designs: [1] [2] [3] One of these, invented by Steve Kirsch of MIT and Mouse Systems Corporation, [4] [5] used an infrared LED and a four-quadrant infrared sensor to ...
On 25 August 2009, U.S. patent 7,580,533 was issued for a device that uses a laser beam and smoke or vapor to detect sound vibrations in free air ("Particulate Flow Detection Microphone based on a laser-photocell pair with a moving stream of smoke or vapor in the laser beam's path"). Sound pressure waves cause disturbances in the smoke that in ...
A computer mouse with the most common features: two buttons (left and right) and a scroll wheel (which can also function as a button when pressed inwards) A typical wireless computer mouse. A computer mouse (plural mice, also mouses) [nb 1] is a hand-held pointing device that detects two-dimensional motion relative to a surface
The first generation Magic Mouse was released on October 20, 2009, and introduced multi-touch functionality. It connects wirelessly to a Mac computer via Bluetooth. [4] It is powered by two AA batteries, and operates using a solid-state laser tracking sensor like the previous-generation wireless Mighty Mouse. Apple includes two non-rechargeable ...
Apple USB Mouse – A revised version of the white Pro Mouse – note how this mouse has white hand grips on the side, which differentiates it from the original pro mouse which had clear grips. In a move away from the bold colors of the iMac and in a return to the styling of the traditional mouse design, Apple discontinued the USB Mouse in July ...
The lyrebird is an Australian species best known for its ability to mimic man-made sounds. National Geographic has recorded these remarkable birds mimicking such unnatural noises as a chainsaw and ...
Long-range optical wireless communication or free-space optical communication (FSO) is an optical communication technology that uses light propagating in free space to wirelessly transmit data for telecommunications or computer networking over long distances. "Free space" means air, outer space, vacuum, or something similar.
VLC systems take advantage of light-emitting diodes (LEDs) which can be pulsed at very high speeds without a noticeable effect on the lighting output and human eye. VLC can be possibly used in a wide range of applications including wireless local area networks, wireless personal area networks and vehicular networks, among others. [1]
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