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An infrared proximity sensor Optical proximity sensor in a 2016 Samsung smartphone.A proximity sensor is a standard feature of most smartphones, disabling the touchscreen when positioned near an ear during phone calls; more recent (late 2019-early 2020) smartphones with OLED displays may have the sensor mounted under the display.
A photoelectric sensor is a device used to determine the distance, absence, or presence of an object by using a light transmitter, often infrared, and a photoelectric receiver. They are largely used in industrial manufacturing.
Hall sensors are used for proximity sensing, positioning, speed detection, and current sensing applications [1] and are common in industrial and consumer applications. Hundreds of millions of Hall sensor integrated circuits (ICs) are sold each year [ 2 ] by about 50 manufacturers, with the global market around a billion dollars .
A proximity sensor is built into some mechanical systems to facilitate homing, which outputs a signal when the mechanical system is in its "home" (reference) position. In such cases, the mechanical system is homed by moving it until the encoder interface receives the sensor signal, whereupon the corresponding position value is jammed into the ...
Tesla Autopilot, an advanced driver-assistance system for Tesla vehicles, uses a suite of sensors and an onboard computer. It has undergone several hardware changes and versions since 2014, most notably moving to an all-camera-based system by 2023, in contrast with ADAS from other companies, which include radar and sometimes lidar sensors.
The 2N3904 is an NPN transistor that can only switch one-third the current of the 2N2222 but has otherwise similar characteristics. The 2N3904 exhibits its forward gain (beta) peak at a lower current than the 2N2222, and is useful in amplifier applications with reduced I c , e.g., (gain peak at 10 mA for the 2N3904 but 150 mA for the 2N2222).
Proximity cards typically have a read range of up to 50 cm (20 in) [1] which is the main difference from the contactless smartcard with a range of 2 to 10 cm (1 to 4 in). The card can often be left in a wallet or purse, [ 3 ] and read by simply holding the wallet or purse near the reader.
A sensor node, also known as a mote (chiefly in North America), is a node in a sensor network that is capable of performing some processing [1], gathering sensory information and communicating with other connected nodes in the network. A mote is a node but a node is not always a mote.
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