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Key Switch
A key switch (sometimes called a keyswitch or lock switch) is a key-operated switch. Key switches are used in situations where access needs to be restricted to the switch's functions. Key switches are available as components with solder connections, and are available with a variety of ampere ratings. They may use tubular or other specially-shaped keys for extra security. Key switches have been used for a variety of purposes, up to and including the launch of nuclear missiles. In less secure applications such as corridor and restroom lighting controls in public buildings, tamper-resistant switch Vandal-resistant switches (also referred to as vandal-proof switches) are electrical switches designed to be installed in a location (or device) and application where they may be subject to abuse and attempts to damage them, as in the case of ped ...es with a simpler key mechanism may be used instead. References Switches Locksmithing {{Electronics-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Key Switch
A key switch (sometimes called a keyswitch or lock switch) is a key-operated switch. Key switches are used in situations where access needs to be restricted to the switch's functions. Key switches are available as components with solder connections, and are available with a variety of ampere ratings. They may use tubular or other specially-shaped keys for extra security. Key switches have been used for a variety of purposes, up to and including the launch of nuclear missiles. In less secure applications such as corridor and restroom lighting controls in public buildings, tamper-resistant switch Vandal-resistant switches (also referred to as vandal-proof switches) are electrical switches designed to be installed in a location (or device) and application where they may be subject to abuse and attempts to damage them, as in the case of ped ...es with a simpler key mechanism may be used instead. References Switches Locksmithing {{Electronics-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Key (lock)
A lock is a mechanical or electronic fastening device that is released by a physical object (such as a key, keycard, fingerprint, RFID card, security token or coin), by supplying secret information (such as a number or letter permutation or password), by a combination thereof, or it may only be able to be opened from one side, such as a door chain. A key is a device that is used to operate a lock (to lock or unlock it). A typical key is a small piece of metal consisting of two parts: the '' bit'' or ''blade'', which slides into the keyway of the lock and distinguishes between different keys, and the ''bow'', which is left protruding so that torque can be applied by the user. In its simplest implementation, a key operates one lock or set of locks that are keyed alike, a lock/key system where each similarly keyed lock requires the same, unique key. The key serves as a security token for access to the locked area; locks are meant to only allow persons having the correct key t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Switch
In electrical engineering, a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit, interrupting the electric current or diverting it from one conductor to another. The most common type of switch is an electromechanical device consisting of one or more sets of movable electrical contacts connected to external circuits. When a pair of contacts is touching current can pass between them, while when the contacts are separated no current can flow. Switches are made in many different configurations; they may have multiple sets of contacts controlled by the same knob or actuator, and the contacts may operate simultaneously, sequentially, or alternately. A switch may be operated manually, for example, a light switch or a keyboard button, or may function as a sensing element to sense the position of a machine part, liquid level, pressure, or temperature, such as a thermostat. Many specialized forms exist, such as the toggle swi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electronic Component
An electronic component is any basic discrete device or physical entity in an electronic system used to affect electrons or their associated fields. Electronic components are mostly industrial products, available in a singular form and are not to be confused with electrical elements, which are conceptual abstractions representing idealized electronic components and elements. Electronic components have a number of electrical terminals or leads. These leads connect to other electrical components, often over wire, to create an electronic circuit with a particular function (for example an amplifier, radio receiver, or oscillator). Basic electronic components may be packaged discretely, as arrays or networks of like components, or integrated inside of packages such as semiconductor integrated circuits, hybrid integrated circuits, or thick film devices. The following list of electronic components focuses on the discrete version of these components, treating such packages as com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ampere
The ampere (, ; symbol: A), often shortened to amp,SI supports only the use of symbols and deprecates the use of abbreviations for units. is the unit of electric current in the International System of Units (SI). One ampere is equal to electrons worth of charge moving past a point in a second. It is named after French mathematician and physicist André-Marie Ampère (1775–1836), considered the father of electromagnetism along with Danish physicist Hans Christian Ørsted. As of the 2019 redefinition of the SI base units, the ampere is defined by fixing the elementary charge to be exactly C ( coulomb), which means an ampere is an electrical current equivalent to elementary charges moving every seconds or elementary charges moving in a second. Prior to the redefinition the ampere was defined as the current that would need to be passed through 2 parallel wires 1 metre apart to produce a magnetic force of newtons per metre. The earlier CGS system had two definitions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Missiles
Nuclear weapons delivery is the technology and systems used to place a nuclear weapon at the position of detonation, on or near its target. Several methods have been developed to carry out this task. ''Strategic'' nuclear weapons are used primarily as part of a doctrine of deterrence by threatening large targets, such as cities. Weapons meant for use in limited military maneuvers, such as destroying specific military, communications, or infrastructure targets, are known as ''tactical'' nuclear weapons. In terms of explosive yields, nowadays the former have much larger yield than the latter, even though it is not a rule. The bombs that destroyed Hiroshima and Nagasaki in 1945 (with TNT equivalents between 15 and 22 kilotons) were weaker than many of today's tactical weapons, yet they achieved the desired effect when used strategically. Nuclear triad A nuclear triad refers to a strategic nuclear arsenal which consists of three components, traditionally strategic bombers, inte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Staircase Timer
A staircase timer is an electrical switch used to control lighting on a staircase, corridor or lobby. A single action turns on the lights and they remain on for long enough to ascend or descend the stairs. The lights then turn themselves off automatically. Operation In a single occupancy domestic dwelling it is usual to provide multiple switching locations. The lights may be turned on or off from either the top, bottom or intermediate floors of the staircase. They remain on until turned off manually. In a multiple occupancy dwelling, the drawback is that the cost of shared lighting is usually paid by the landlord. Individual tenants turn lights on, but have little reason to turn them off. Particularly so in the days of incandescent lamps this could be an appreciable cost. For this reason shared dwellings favour timers for staircases instead. The lights are turned on by a push-button switch on any floor. They remain on automatically for an adequate time to climb the stairs, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tamper-resistant Switch
Vandal-resistant switches (also referred to as vandal-proof switches) are electrical switches designed to be installed in a location (or device) and application where they may be subject to abuse and attempts to damage them, as in the case of pedestrian crossing switches. Vandal-resistant switches located on devices that are outdoors must be able to withstand extreme temperatures, dust, rain, snow, and ice. Many vandal-resistant switches are intended to be operated by the general public, and must withstand heavy use and even abuse, such as attempts to damage the switch with metal tools. These switches must also resist dirt and moisture. Tamper-resistant switches (or tamper-proof switches) are types of vandal-resistant switches which are not intended to be operated except by authorized users. They may control special functions, such as auditing of voting machines, operation of power tools or equipment, enabling of security alarm systems (e.g., arming and disarming), or restocking o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maplin Electronics
Maplin Electronics is the trading name of an online retailer of electronic goods in the United Kingdom and Ireland launched in 2019, using the brand of the former company Maplin Electronics Ltd., which operated from 1972 to 2018. The original Maplin company operated many retail shops and an extensive mail order service, online and by telephone; in June 2017, there were 217 Maplin stores. On 28 February 2018, Maplin went into administration and all stores permanently ceased trading in June that year. The brand of Maplin was acquired by a new company, Maplin Online Ltd., on 31 May 2019, later renamed Digital First Retail Ltd., still trading as Maplin. The new company sells similar products to Maplin Electronics Ltd, using the Maplin website, branding and trading name. No physical Maplin shops have been opened, and the legal obligations of Maplin Electronics Ltd, such as warranty support, were not assumed. History Founding Maplin Electronic Supplies was established in 1972 as a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Switches
In electrical engineering, a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit, interrupting the electric current or diverting it from one conductor to another. The most common type of switch is an electromechanical device consisting of one or more sets of movable electrical contacts connected to external circuits. When a pair of contacts is touching current can pass between them, while when the contacts are separated no current can flow. Switches are made in many different configurations; they may have multiple sets of contacts controlled by the same knob or actuator, and the contacts may operate simultaneously, sequentially, or alternately. A switch may be operated manually, for example, a light switch or a keyboard button, or may function as a sensing element to sense the position of a machine part, liquid level, pressure, or temperature, such as a thermostat. Many specialized forms exist, such as the toggle switc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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