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A common dual dimmer module used in stage lighting A dimmer. A dimmer is a device connected to a light fixture and used to lower the brightness of the light.By changing the voltage waveform applied to the lamp, it is possible to lower the intensity of the light output.
Thyratron dimmers were manufactured under license from Strand Electric of England. [29] All this started to change in 1958. In 1959 the first commercially viable solid state theatre dimmer, Kliegl's SCR(R), was introduced as model R59. [45] [46] Improved models followed. Within two years, the solid state dimmer had, as a practical matter, swept ...
The phosphor layer emits light through the transparent face of the envelope. The system has a power supply providing at least 5kVDC to the light emitting device, and the electrons transiting from cathode to anode are essentially unfocused. Additional circuits allow TRIAC-type dimmers to control the light level. [6]
A science fair or engineering fair is an event hosted by a school that offers students the opportunity to experience the practices of science and engineering for themselves. In the United States, the Next Generation Science Standards makes experiencing the practices of science and engineering one of the three pillars of science education.
An Azerbaijani airliner carrying 67 people crashed near the city of Aktau in Kazakhstan on Wednesday, killing at least 38 who were on board, according to a Kazakh official.
A science project is an educational activity for students involving experiments or construction of models in one of the science disciplines. Students may present their science project at a science fair, so they may also call it a science fair project. Science projects may be classified into four main types.
Baltimore Ravens (10-5) at Houston Texans (9-6) 4:30 p.m. ET, Netflix. What's on the line: The Ravens kept themselves alive for the AFC North title with a win over the Steelers last week.A ...
The NBA Christmas Day quintuple-header offered some star performances and interesting results, but the calendar rolls on with a full weekend slate. On Friday, fans will get a rematch of the ...
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