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  2. Television interference - Wikipedia

    en.wikipedia.org/wiki/Television_interference

    A typical SCR based light dimmer which dims the light through phase angle control. This unit is wired in series with the load. Diodes (D 2, D 3, D 4 and D 5) for a bridge which generates DC with much ripple. R and C form a circuit with a time constant, as the voltage increases from zero (at the start of every halfwave) C will charge up, when C ...

  3. Digital television adapter - Wikipedia

    en.wikipedia.org/wiki/Digital_television_adapter

    A digital TV converter box. A digital television adapter (DTA), commonly known as a converter box or decoder box, is a television tuner that receives a digital television (DTV) transmission, and converts the digital signal into an analog signal that can be received and displayed on an analog television set.

  4. Dimmer - Wikipedia

    en.wikipedia.org/wiki/Dimmer

    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.

  5. Light switch - Wikipedia

    en.wikipedia.org/wiki/Light_switch

    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] The "quick-break" switch overcame the problem of a switch's contacts developing electric arcing ...

  6. Digital television transition - Wikipedia

    en.wikipedia.org/wiki/Digital_television_transition

    The switch-off was noticed by few, since the overwhelming majority receive TV via cable and only around 74,000 households relied on terrestrial over-the-air broadcasts. [2] The switch-off was helped greatly as cable continued to use analog distribution, and thus consumers' old tuners continued to be useful.

  7. Cable converter box - Wikipedia

    en.wikipedia.org/wiki/Cable_Converter_Box

    Pace Micro Technology DC757X HD cable box. A cable converter box or television converter box is an electronic tuning device that transposes/converts channels from a cable television service to an analog RF signal on a single channel, usually VHF channel 3 or 4, or to a different output for digital televisions such as HDMI.

  8. DMX512 - Wikipedia

    en.wikipedia.org/wiki/DMX512

    Typically a dimmer has a starting address that represents the lowest-numbered dimmer in that pack, and the addressing increases from there to the highest-numbered dimmer. As an example, for two packs of six dimmers each, the first pack would start at address 1 and the second pack at address 7. Each slot in the DMX512 packet corresponds to one ...

  9. Joel Spira (businessman) - Wikipedia

    en.wikipedia.org/wiki/Joel_Spira_(businessman)

    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.