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Non-dim Circuit
A non-dim circuit is a special electrical network. In theater, it is a type of outlet usually controlled from the stage manager's panel or from the Lighting control console . The word non-dim is used to distinguish this type of circuit which operates only in on or off modes, from a dimmer, which can be at any intensity on a continuum. It is generally a remotely operated relay. Many modern computerized lighting systems allow a dimmer to be set as "non-dim" and controlled using the Lighting control console, however, this can be less desirable than using a "true" switched circuit, as the Triac in the dimmer never truly supplies a "proper" sine wave, which can cause damage to equipment. Non-Dims are often used to allow switched equipment such as motors, hazers or other similar electrical equipment to be triggered as part of a lighting cue. Sometimes house work lights or stage work lights can be controlled using a non-dimmed circuit. It is also sometimes used to provide power to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Network
An electrical network is an interconnection of electrical components (e.g., batteries, resistors, inductors, capacitors, switches, transistors) or a model of such an interconnection, consisting of electrical elements (e.g., voltage sources, current sources, resistances, inductances, capacitances). An electrical circuit is a network consisting of a closed loop, giving a return path for the current. Linear electrical networks, a special type consisting only of sources (voltage or current), linear lumped elements (resistors, capacitors, inductors), and linear distributed elements (transmission lines), have the property that signals are linearly superimposable. They are thus more easily analyzed, using powerful frequency domain methods such as Laplace transforms, to determine DC response, AC response, and transient response. A resistive circuit is a circuit containing only resistors and ideal current and voltage sources. Analysis of resistive circuits is less complicated t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stage Manager
Stage management is a broad field that is generally defined as the practice of organization and coordination of an event or theatrical production. Stage management may encompass a variety of activities including the overseeing of the rehearsal process and coordinating communications among various production teams and personnel. Stage management requires a general understanding of all aspects of production and provides complete organization to ensure the process runs smoothly and efficiently. A stage manager is an individual who has overall responsibility for stage management and the smooth execution of a theatrical production. Stage management may be performed by an individual in small productions, while larger productions typically employ a stage management team consisting of a head stage manager, or production stage manager, and one or more assistant stage managers. History The title of stage manager was not used until the 18th century, though the concept and need for s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighting Control Console
A lighting control console (also called a lightboard, lighting board, or lighting desk) is an electronic device used in theatrical lighting design to control multiple stage lights at once. They are used throughout the entertainment industry and are normally placed at the front of house (FOH) position or in a control booth. All lighting control consoles can control dimmers which control the intensity of the lights. Many modern consoles can control Intelligent lighting (lights that can move, change colors and gobo patterns), fog machines and hazers, and other special effects devices. Some consoles can also interface with other electronic performance hardware (i.e. sound boards, projectors, media servers, automated winches and motors, etc.) to improve synchronization or unify their control. Lighting consoles communicate with the dimmers and other devices in the lighting system via an electronic control protocol. The most common protocol used in the entertainment industry today ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dimmer
A dimmer is a device connected to a light fixture and used to lower the brightness of the lighting, light. By changing the voltage waveform applied to the lamp, it is possible to lower the luminous intensity, intensity of the light output. Although variable-voltage devices are used for various purposes, the term ''dimmer'' is generally reserved for those intended to lighting control system, control light output from resistive incandescent light, incandescent, halogen lamp, halogen, and (more recently) compact fluorescent lamps (CFLs) and light-emitting diodes (LED lamp, LEDs). More specialized equipment is needed to dim fluorescent lamp, fluorescent, mercury-vapor lamp, mercury-vapor, solid-state lighting, solid-state, and other arc lamp, arc lighting. Dimmers range in size from small units the size of domestic light switches to high-power units used in large theatrical or architectural lighting design, architectural lighting installations. Small domestic dimmers are generally ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Relay
A relay Electromechanical relay schematic showing a control coil, four pairs of normally open and one pair of normally closed contacts An automotive-style miniature relay with the dust cover taken off A relay is an electrically operated switch. It consists of a set of input terminals for a single or multiple control signals, and a set of operating contact terminals. The switch may have any number of contacts in multiple contact forms, such as make contacts, break contacts, or combinations thereof. Relays are used where it is necessary to control a circuit by an independent low-power signal, or where several circuits must be controlled by one signal. Relays were first used in long-distance telegraph circuits as signal repeaters: they refresh the signal coming in from one circuit by transmitting it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operations. The traditional form of a relay uses an electromagnet to c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TRIAC
A TRIAC (triode for alternating current; also bidirectional triode thyristor or bilateral triode thyristor) is a three terminal electronic component that conducts current in either direction when triggered. The term TRIAC is a genericised trademark. TRIACs are a subset of thyristors (analogous to a relay in that a small voltage and current can control a much larger voltage and current) and are related to silicon controlled rectifiers (SCRs). TRIACs differ from SCRs in that they allow current flow in both directions, whereas an SCR can only conduct current in a single direction. Most TRIACs can be triggered by applying either a positive or negative voltage to the gate (an SCR requires a positive voltage). Once triggered, SCRs and TRIACs continue to conduct, even if the gate current ceases, until the main current drops below a certain level called the holding current. Gate turn-off thyristors (GTOs) are similar to TRIACs but provide more control by turning off when the gate signa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
House Lights
Stage lighting instruments (lanterns, or luminaires in Europe) are used in stage lighting to illuminate theatre, theatrical productions, concerts, and other performances taking place in live performance Theater (structure), venues. They are also used to light television studios and sound stages. Many stagecraft terms vary between the United States and the United Kingdom. In the United States, lighting fixtures are often called "instruments" or "units". In the UK, they are called "lanterns" or "luminaires". This article mainly uses terms common to the United States. Components :''See the picture at the top of the page for the physical location of most components.'' Stage lighting instruments all have the following components: Housing The lamp housing is a metal or plastic container that serves as a body for the entire instrument and prevents light from spilling in unwanted directions. It comprises all of the exterior of the fixture except for the lens or opening. The housing m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Worklight
In theater, a worklight is a high-intensity light fixture which is used to illuminate the stage for the benefit of technicians. Technicians use these lights, rather than the stage lights for a number of reasons. Firstly, it takes much less technical knowledge to turn on worklights, so even people with no knowledge of electrics can turn them on. Secondly, regardless of the lights hung for the specific show, they provide fairly consistent and complete lighting. Finally, and most importantly, they are designed to be cheap and easy to re-lamp, in contrast to theatrical fixtures, which have expensive lamps and would burn through color gels if used to illuminate stage work. Worklights are not designed to light the stage in an aesthetically pleasing way, but rather to be efficient in terms of space and heat; however, they may occasionally be used to emphasize plot elements during a show. They are generally near-white. Worklights are usually placed on catwalks and battens, or can be pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intelligent Lighting
Intelligent lighting refers to lighting that has automated or mechanical abilities beyond those of traditional, stationary illumination. Although the most advanced intelligent lights can produce extraordinarily complex effects, the intelligence lies with the human lighting designer, control system programmer, or the lighting operator, rather than the fixture itself. For this reason, intelligent lighting (ILS) is also known as automated lighting, moving lights, moving heads, or simply movers. More recently the term has fallen into disuse as abilities once reserved to a specific category of lighting instruments (most notably colour changing and variable focus) have become pervasive across a range of fixtures. The distinction has become more blurred with the introduction of machines that would not be considered lights but share the ability to move their orientation and are operated by the same DMX512 control protocol, such as moving yoke projectors. History There are many patents ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metal Halide Lamp
A metal (from Greek μέταλλον ''métallon'', "mine, quarry, metal") is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically ductile (can be drawn into wires) and malleable (they can be hammered into thin sheets). These properties are the result of the ''metallic bond'' between the atoms or molecules of the metal. A metal may be a chemical element such as iron; an alloy such as stainless steel; or a molecular compound such as polymeric sulfur nitride. In physics, a metal is generally regarded as any substance capable of conducting electricity at a temperature of absolute zero. Many elements and compounds that are not normally classified as metals become metallic under high pressures. For example, the nonmetal iodine gradually becomes a metal at a pressure of between 40 and 170 thousand times atmospheric pressure. Equally, some materials regarded as metals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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