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Scoreboard
A scoreboard is a large board for publicly displaying the score (sport), score in a game. Most levels of sport from high school and above use at least one scoreboard for keeping score, measuring time, and displaying statistics. Scoreboards in the past used a mechanical clock and numeral cards to display the score. When a point was made, a person would put the appropriate digits on a hook. Most modern scoreboards use electromechanical or electronic means of displaying the score. In these, digits are often composed of large dot matrix, dot-matrix or seven-segment displays made of Incandescent light bulb, incandescent bulbs, light-emitting diodes, or electromechanical flip segments. An official or neutral person will operate the scoreboard, using a control panel (engineering), control panel. Scoreboards in various sports North American football In both the American football, United States and Canadian football codes, the minimum details displayed are the time and score of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daktronics Scoreboard Blue And Yellow
Daktronics, Inc. is an American company based in Brookings, South Dakota, that designs, manufactures, sells, and services video displays, scoreboards, digital billboards, dynamic message signs, sound systems, and related products. It was founded in 1968 by two South Dakota State University professors. History Daktronics was founded in 1968 by Al Kurtenbach and Duane Sander, professors of electrical engineering at South Dakota State University in Brookings, South Dakota. The name is a portmanteau of "Dakota" and "electronics". The company wanted to get into the medical instrument field, but the company's founders found that field too large for them, so they changed their focus to providing electronic voting systems for state legislatures; their first client was for the State of Utah's legislature. Shortly after, South Dakota State University's wrestling coach, Warren Williamson reached out to the company and asked them to devise a better scoreboard for wrestling. The result wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Instant Replay
Instant replay or action replay is a video reproduction of something that recently occurred, both shot and broadcast live TV, live. After being shown live, the video is replayed so viewers can see it again and analyze what just happened. Sports—such as American football, association football, Badminton, cricket, and tennis—allow officiating calls to be overturned after a play review. Instant replay is most commonly used in sports but is also used in other fields of live TV. While the first near-instant replay system was developed and used in Canada, the first ''instant'' replay was developed and deployed in the United States. Apart from live-action sports, instant replay is also used to cover large pageants or processions involving prominent dignitaries (e.g., monarchs, religious leaders such as the Catholic Pope, revolutionary leaders with mass appeal), political debate, legal proceedings (e.g., O.J. Simpson murder case), Royal wedding, royal weddings, red carpet events ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time-out (sport)
In sports, a time-out (or timeout) is a halt in the play. This allows the coaches of either team to communicate with the team, e.g., to determine strategy or inspire morale, as well as to stop the game clock. Time-outs are usually called by coaches or players, although for some sports, TV timeouts are called to allow media to air commercial breaks. Teams usually call timeouts at strategically important points in the match, or to avoid the team being called for a delay of game-type violation, such as the five-second rule in basketball. List of time-out rules by sport Association football With very few exceptions (such as the defunct North American Soccer League's experimentation with TV timeouts) timeouts have never been permitted in association football. Moreover, the game clock runs continuously in each half, even if extenuating circumstances compel the referee to halt play for an extended period of time, unless and until the match is abandoned. However, the referee adds sto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light-emitting Diode
A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (corresponding to the energy of the photons) is determined by the energy required for electrons to cross the band gap of the semiconductor. White light is obtained by using multiple semiconductors or a layer of light-emitting phosphor on the semiconductor device. Appearing as practical electronic components in 1962, the earliest LEDs emitted low-intensity infrared (IR) light. Infrared LEDs are used in remote-control circuits, such as those used with a wide variety of consumer electronics. The first visible-light LEDs were of low intensity and limited to red. Early LEDs were often used as indicator lamps, replacing small incandescent bulbs, and in seven-segment displays. Later developments produced LEDs available in visible, ultraviolet (U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buzzer
A buzzer or beeper is an audio signaling device, which may be mechanical, electromechanical, or piezoelectric (''piezo'' for short). Typical uses of buzzers and beepers include alarm devices, timers, train and confirmation of user input such as a mouse click or keystroke. History Electromechanical The electric buzzer was invented in 1831 by Joseph Henry. They were mainly used in early doorbells until they were phased out in the early 1930s in favor of musical chimes, which had a softer tone. Piezoelectric Piezoelectric buzzers, or piezo buzzers, as they are sometimes called, were invented by Japanese manufacturers and fitted into a wide array of products during the 1970s to 1980s. This advancement mainly came about because of cooperative efforts by Japanese manufacturing companies. In 1951, they established the Barium Titanate Application Research Committee, which allowed the companies to be "competitively cooperative" and bring about several piezoelectric innovati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Klaxon
A horn is a sound-making device installed on motor vehicles, trains, boats, and other types of vehicles. The sound it makes usually resembles a “honk” (older vehicles) or a “beep” (modern vehicles). The driver uses the horn to warn others of the vehicle's presence or approach, or to call attention to some hazard. Motor vehicles, ships and trains are required by law in some countries to have horns. Trams, trollies, streetcars, and even bicycles are also legally required to have an audible warning device in many areas. Types Motor vehicles Modern car horns are usually electric, driven by a flat circular steel diaphragm that has an electromagnet acting on it in one direction and a spring pulling in the opposite direction. The diaphragm is attached to contact points that repeatedly interrupt the current to that electromagnet causing the diaphragm to spring back the other way, which completes the circuit again. This arrangement opens and closes the circuit hundreds of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Running Out The Clock
In sports strategy, running out the clock, also known as running down the clock, stonewalling, killing the clock, chewing the clock, stalling, eating clock or time-wasting (or timewasting), is the practice of a winning team allowing the clock to expire through a series of preselected plays, either to preserve a lead or hasten the end of a one-sided contest. Such measures expend time but do not otherwise have a tactical purpose. This is usually done by a team that is winning by a slim margin (or, occasionally, tied) near the end of a game, in order to reduce the time available for the opposing team to score. Generally, it is the opposite strategy of running up the score. The process of running out the clock generally involves low-risk, low-event play, intending to minimize the ability of the other team to interfere or counter. As this produces unexciting sport for spectators, many rulebooks attempt to counteract this; some include a time limit for completing a play, such as a pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shot Clock
A shot clock is a countdown timer used in a variety of games and sports, indicating a set amount of time that a team may possess the object of play before attempting to score a goal. Shot clocks are used in several sports including basketball, water polo, canoe polo, lacrosse, poker, ringette, korfball, tennis, ten-pin bowling, and various cue sports. It is analogous with the play clock used in American and Canadian football, and the pitch clock used in baseball. This article deals chiefly with the shot clock used in basketball. The set amount of time for a shot clock in basketball is 24–35 seconds, depending on the league. This clock reveals how much time a team may possess the ball before attempting to score a field goal. It may be colloquially known as the 24-second clock, particularly in the NBA and other leagues where that is the duration of the shot clock. If the shot clock reaches zero before the team attempts a field goal, the team has committed a shot clock violati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Personal Foul (basketball)
In basketball, a personal foul is a breach of the rules concerning personal contact with an opponent. It is the most common type of foul in basketball. A player fouls out on reaching a limit on personal fouls for the game and is disqualified from participation in the remainder of the game. Players routinely initiate illegal contact to purposely affect the play, hoping it is seen as too minor to be ruled a foul. The threshold is subjective and varies among officials and from game to game. Most contact fouls are not regarded as unsportsmanlike. However, excessive or unjustified contact is penalized more severely. The NBA refers to these as flagrant fouls; other rulebooks call them unsportsmanlike or disqualifying fouls. History Basketball has always had the concept of fouls. In 1891, James Naismith's original 13 rules defined a foul as: *running with the ball, *holding the ball with the arms or body, *striking the ball with the fist, *shouldering, holding, pushing, striking or t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Millisecond
A millisecond (from '' milli-'' and second; symbol: ms) is a unit of time in the International System of Units equal to one thousandth (0.001 or 10−3 or 1/1000) of a second or 1000 microseconds. A millisecond is to one second, as one second is to approximately 16.67 minutes. A unit of 10 milliseconds may be called a centisecond, and one of 100 milliseconds a decisecond, but these names are rarely used. To help compare orders of magnitude of different times, this page lists times between 10−3 seconds and 100 seconds (1 millisecond and one second). ''See also'' times of other orders of magnitude. Examples The Apollo Guidance Computer used metric units internally, with centiseconds used for time calculation and measurement. *1 millisecond (1 ms) – cycle time for frequency 1 kHz; duration of light for typical photo flash strobe; time taken for sound wave to travel about 34 cm; repetition interval of GPS C/A PN code *1 millisecond – time taken ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basketball
Basketball is a team sport in which two teams, most commonly of five players each, opposing one another on a rectangular Basketball court, court, compete with the primary objective of #Shooting, shooting a basketball (ball), basketball (approximately in diameter) through the defender's Basket (basketball), hoop (a basket in diameter mounted high to a Backboard (basketball), backboard at each end of the court), while preventing the opposing team from shooting through their own hoop. A Field goal (basketball), field goal is worth two points, unless made from behind the 3 point line, three-point line, when it is worth three. After a foul, timed play stops and the player fouled or designated to shoot a technical foul is given one, two or three one-point free throws. The team with the most points at the end of the game wins, but if regulation play expires with the score tied, an additional period of play (Overtime (sports), overtime) is mandated. Players advance the ball by boun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
