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The network is controlled by operators stationed in a central signal box located at Syntagma station. Points are protected by two-aspect color light signals, designated as "switch point indicators". Initially these signals display either a white or a red light. Recently the white aspect was replaced with a green aspect.
A position light signal is one where the position of the lights, rather than their colour, determines the meaning. The aspect consists solely of a pattern of illuminated lights, which are all of the same colour. In many countries, small position light signals are used as shunting signals, while the main signals are of colour light form.
In electrical wiring, a light switch is a switch most commonly used to operate electric lights, permanently connected equipment, or electrical outlets. Portable lamps such as table lamps may have a light switch mounted on the socket, base, or in-line with the cord.
To enable trains to run at night, one or more lights are usually provided at each signal. Typically this comprises a permanently lit oil lamp with movable coloured spectacles in front that alter the colour of the light. The driver therefore had to learn one set of indications for daytime viewing and another for nighttime viewing.
A switch may be directly manipulated by a human as a control signal to a system, such as a computer keyboard button, or to control power flow in a circuit, such as a light switch. Automatically operated switches can be used to control the motions of machines, for example, to indicate that a garage door has reached its full open position or that ...
Usually user can control the light using mobile app. But for some products, extra corresponding hub is needed to connect those smart switches. In order to avoid the hub, wireless light switch and luminaire needs to share the same protocol, e.g. Bluetooth mesh Lighting model or Zigbee LightLink.
These include an array of buttons allowing the operator to select the fixture or fixtures they want to control, and a joystick, or a number of wheels or rotary encoders to control fixture attributes such as the orientation (pan and tilt), focus, colour, gobos etc. found in this type of light. Unlike a fader that shows its value based on the ...
Usually the fixtures are connected to a lighting control console, which outputs a control signal. This control signal sends data to the fixture usually in one of three ways: Analogue (which has largely been phased out), DMX (which stands for "Digital Multiplex", also the industry standard control protocol), or Ethernet Control (such as ArtNet ...
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