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Solid-state, or semiconductor, dimmers were introduced to solve some of these problems. Semiconductor dimmers switch on at an adjustable time (phase angle) after the start of each alternating-current half-cycle, thereby altering the voltage waveform applied to lamps and so changing its RMS effective value. Because they switch instead of ...
The major advantage of a lighting control system over stand-alone lighting controls or conventional manual switching is the ability to control individual lights or groups of lights from a single user interface device. This ability to control multiple light sources from a user device allows complex lighting scenes to be created.
Joel Solon Spira (March 1, 1927 – April 8, 2015) was an American inventor, entrepreneur, and business magnate.. He invented a version of the light-dimmer switch for use in homes around the United States and led his Lutron Electronics Company into the production of lighting controllers.
Linebacker Azeez Al-Shaair will be back for the Houston Texans in Week 18 following his three-game suspension for a hit that concussed Trevor Lawrence of the Jacksonville Jaguars on Dec. 1.
Two light switches in one box. The switch on the right is a dimmer switch. The switch box is covered by a decorative plate. The first light switch employing "quick-break technology" was invented by John Henry Holmes in 1884 in the Shieldfield district of Newcastle upon Tyne. [1]
And chemicals often found in plastics are known to cause a variety of health problems, including cancers, metabolic disorders, attention deficit/hyperactivity disorder, and fertility issues.
Tens of thousands of anti-government protesters in Belgrade on Friday stood in silence in front of the state television RTS building for 15 minutes to commemorate victims of a railway station roof ...
As the software industry was developing, the question of how to best document software programs was undecided. This was a unique problem for software developers, since users often became frustrated with current help documents. [2] Some considerations for writing a user guide that developed at this time include: the use of plain language [2]