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  2. LED lamp - Wikipedia

    en.wikipedia.org/wiki/LED_lamp

    A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...

  3. LED circuit - Wikipedia

    en.wikipedia.org/wiki/LED_circuit

    Simple LED (Light Emitting Diode) circuit diagram. In electronics, an LED circuit or LED driver is an electrical circuit used to power a light-emitting diode (LED). The circuit must provide sufficient current to light the LED at the required brightness, but must limit the current to prevent damaging the LED.

  4. Wireless power transfer - Wikipedia

    en.wikipedia.org/wiki/Wireless_power_transfer

    The development of microwave technology during World War II, such as the klystron and magnetron tubes and parabolic antennas, [55] made radiative methods practical for the first time, and the first long-distance wireless power transmission was achieved in the 1960s by William C. Brown. [28]

  5. List of vacuum tubes - Wikipedia

    en.wikipedia.org/wiki/List_of_vacuum_tubes

    4.8 12 volt heater tubes. ... Microwave tubes: Output power <1W; Other tubes: ... Light bulbs since 1911 under the Belgian Mazda brand;

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  7. Electronic component - Wikipedia

    en.wikipedia.org/wiki/Electronic_component

    Light-emitting diode (LED) – a diode that emits light; Photodiode – passes current in proportion to incident light Avalanche photodiode – photodiode with internal gain; Solar Cell, photovoltaic cell, PV array or panel – produces power from light; DIAC (diode for alternating current), Trigger Diode, SIDAC) – often used to trigger an SCR

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