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List Of Network Buses
List of electrical characteristics of single collision domain segment "slow speed" network buses: {, class="wikitable sortable" style="width:100%;" ! Name !! Multidrop !! Max nodes !! Electrical type !! Cable type !! data-sort-type="number", Max bitrate [kbit/s] !data-sort-type="number", Length at max bitrate!! data-sort-type="number" , Max length [m] !data-sort-type="number", Bitrate at max length , - , , , , , , , , , , , , , , , , - , EIA-485 , , Y , , 256 , , EIA-485 , , Twisted pair , , , , , , , - , SCSI-1/2 , , Y , , 8 , , Open collector , , Ribbon cable , , , , , , , - , SCSI Ultra2 , , Y , , 16 , , EIA-485 , , Twisted pair , , , , , , , - , LIN, , Y , , 16 , , Open collector, , open collector with pull-up to 12V car supply , , , , , , - , SIOX , , Y , , 62 , , , , , , , , , , , - , I²C , , Y , , 127 or 1023 , , Open collector , , , , , , , , , - , SMBus , , Y , , 128 , , Open co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Collision Domain
In physics, a collision is any event in which two or more bodies exert forces on each other in a relatively short time. Although the most common use of the word ''collision'' refers to incidents in which two or more objects collide with great force, the scientific use of the term implies nothing about the magnitude of the force. Some examples of physical interactions that scientists would consider collisions are the following: * When an insect lands on a plant's leaf, its legs are said to collide with the leaf. * When a cat strides across a lawn, each contact that its paws make with the ground is considered a collision, as well as each brush of its fur against a blade of grass. * When a boxer throws a punch, their fist is said to collide with the opponents body. * When an astronomical object merges with a black hole, they are considered to collide. Some colloquial uses of the word collision are the following: * A traffic collision involves at least one automobile. * A mid-a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RG-58
RG-58/U is a type of coaxial cable often used for low-power signal and RF connections. The cable has a characteristic impedance of either 50 or 52 Ω. "RG" was originally a unit indicator for bulk RF cable in the U.S. military's Joint Electronics Type Designation System. There are several versions covering the differences in core material (solid or braided wire) and shield (70% to 95% coverage). The outside diameter of RG-58 is around 0.2 inches (5 mm). RG-58 weighs around 0.025 lb/ft (37 g/m), exhibits approximately 25 pF/ft (82 pF/m) capacitance and can tolerate a maximum of 300 V potential (1800 W). Plain RG-58 cable has a solid center conductor. The RG-58A/U features a flexible 7- or 19-strand center conductor. Most two-way radio communication systems, such as marine, CB radio, amateur, police, fire, WLAN antennas etc., are designed to work with a 50 Ω cable. RG-58 cable is often used as a generic carrier of signals in labo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Short PWM Code
Short may refer to: Places * Short (crater), a lunar impact crater on the near side of the Moon * Short, Mississippi, an unincorporated community * Short, Oklahoma, a census-designated place People * Short (surname) * List of people known as the Short Arts, entertainment, and media * Short film, a cinema format (also called film short or short subject) * Short story, prose generally readable in one sitting * ''The Short-Timers'', a 1979 semi-autobiographical novel by Gustav Hasford, about military short-timers in Vietnam Brands and enterprises * Short Brothers, a British aerospace company * Short Brothers of Sunderland, former English shipbuilder Computing and technology * Short circuit, an accidental connection between two nodes of an electrical circuit * Short integer, a computer datatype Finance * Short (finance), stock-trading position * Short snorter, a banknote signed by fellow travelers, common during World War II Foodstuffs * Short pastry, one which is rich in butte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SENT (protocol)
The SAE J2716 SENT (Single Edge Nibble Transmission) protocol is a point-to-point scheme for transmitting signal values from a sensor to a controller. It is intended to allow for transmission of high resolution data with a low system cost. Hardware The SENT protocol is a one-way, asynchronous voltage interface which requires three wires: a signal line (low state 4.1 V), a supply voltage line (5 V) and a ground line. SENT uses pulse-width modulation to encode four bits (one nibble) per symbol. The basic unit of time in SENT is called a tick, where a tick can be between 3 - 90 µs, at the sender's option. Each message is preceded by a calibration pulse with a high period of 56 ticks for framing and calibration of tick length. After the calibration pulse, each nibble is transmitted with a fixed-width low signal, followed by a variable-length high period. The low-period is 5 (or more) ticks in length, while the high period can vary, for a total time between falling edg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Line Communication
Power-line communication (also known as power-line carrier or PLC) carries data on a conductor that is also used simultaneously for AC electric power transmission or electric power distribution to consumers. A wide range of power-line communication technologies are needed for different applications, ranging from home automation to Internet access which is often called broadband over power lines (BPL). Most PLC technologies limit themselves to one type of wires (such as premises wiring within a single building), but some can cross between two levels (for example, both the distribution network and premises wiring). Typically transformers prevent propagating the signal, which requires multiple technologies to form very large networks. Various data rates and frequencies are used in different situations. A number of difficult technical problems are common between wireless and power-line communication, notably those of spread spectrum radio signals operating in a crowded environment ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
X10 (industry Standard)
X10 is a protocol for communication among electronic devices used for home automation (''domotics''). It primarily uses power line wiring for signaling and control, where the signals involve brief radio frequency bursts representing digital information. A wireless radio-based protocol transport is also defined. X10 was developed in 1975 by Pico Electronics of Glenrothes, Scotland, in order to allow remote control of home devices and appliances. It was the first general purpose domotic network technology and remains the most widely available. Although a number of higher-bandwidth alternatives exist, X10 remains popular in the home environment with millions of units in use worldwide, and inexpensive availability of new components. History In 1970, a group of engineers started a company in Glenrothes, Scotland called Pico Electronics. The company developed the first single chip calculator. When calculator integrated circuit prices started to fall, Pico refocused on commercial p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1-Wire
1-Wire is a device communications bus system designed by Dallas Semiconductor Corp. that provides low-speed (16.3 kbit/s) data, signaling, and power over a single conductor. 1-Wire is similar in concept to I²C, but with lower data rates and longer range. It is typically used to communicate with small inexpensive devices such as digital thermometers and weather instruments. A network of 1-Wire devices with an associated master device is called a MicroLAN. The protocol is also used in small electronic keys known as a Dallas key or . One distinctive feature of the bus is the possibility of using only two wires — data and ground. To accomplish this, 1-Wire devices include an 800 pF capacitor to store charge and power the device during periods when the data line is active. Usage example 1-Wire devices are available in different packages: integrated circuits, a TO-92-style transistor, and a portable form called an or Dallas key which is a small stainless-steel package ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peripheral Sensor Interface 5
{{Short description, Digital interface for sensors Peripheral Sensor Interface (PSI5) is a digital interface for sensors. PSI5 is a two-wire interface, used to connect peripheral sensors to electronic control units in automotive electronics. Both point-to-point and bus configurations with asynchronous and synchronous data transmission are supported. Functional description PSI5 is a current interface with modulation of the sending current for the transmission of data on the power supply lines. The relatively high sending current and the use of a Manchester code for bit encoding result in high immunity against interference from radiated emissions. The use of an inexpensive twisted pair cable is thus sufficient for most of the applications, however, in automotive more expensive cabling is employed. Data words consist of two start bits, 8 to 24 data bits and a single parity bit or optional three bit CRC (cyclic redundancy check). The bitrate is 125 kbit/s or optionally 189 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RS-232
In telecommunications, RS-232 or Recommended Standard 232 is a standard originally introduced in 1960 for serial communication transmission of data. It formally defines signals connecting between a ''DTE'' (''data terminal equipment'') such as a computer terminal, and a ''DCE'' (''data circuit-terminating equipment'' or ''data communication equipment''), such as a modem. The standard defines the electrical characteristics and timing of signals, the meaning of signals, and the physical size and pinout of connectors. The current version of the standard is ''TIA-232-F Interface Between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange'', issued in 1997. The RS-232 standard had been commonly used in computer serial ports and is still widely used in industrial communication devices. A serial port complying with the RS-232 standard was once a standard feature of many types of computers. Personal computers used them for connection ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Single-ended Signalling
Single-ended signaling is the simplest and most commonly used method of transmitting electrical signals over wires. One wire carries a varying voltage that represents the signal, while the other wire is connected to a reference voltage, usually ground. The main alternative to single-ended signaling is called ''differential signaling'' where the two conductors carry signals equal in magnitude but of opposite electric polarity. Single-ended signaling is less expensive to implement than differential, but it has a distinct disadvantage: a single-ended system requires a power supply voltage equal to the maximum amplitude of the signal to be received whereas a differential system only requires a voltage half of the signal amplitude to be received. For a given power supply voltage then, a differential system produces signals of twice the amplitude and therefore has twice as good noise immunity (6 dB higher signal-to-noise ratio) as a single-ended system. The main advantage of single-e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Command Control
Digital Command Control (DCC) is a standard for a system to operate model railways digitally. When equipped with Digital Command Control, locomotives on the same electrical section of track can be independently controlled. The DCC protocol is defined by the Digital Command Control Working group of the National Model Railroad Association (NMRA). The NMRA has trademarked the term DCC, so while the term ''Digital Command Control'' is sometimes used to describe any digital model railway control system, strictly speaking it refers to NMRA DCC. History and Protocols A digital command control system was developed (under contract by Lenz Elektronik GmbH of Germany) in the 1980s for two German model railway manufacturers, Märklin and Arnold. The first digital decoders that Lenz produced appeared on the market early 1989 for Arnold (N) and mid 1990 for Märklin (Z, H0 and 1; Digital=). Märklin and Arnold exited the agreement over patent issues, but Lenz continued to develop the system. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
