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  2. Series and parallel circuits - Wikipedia

    en.wikipedia.org/wiki/Series_and_parallel_circuits

    If the light bulbs are connected in parallel, the currents through the light bulbs combine to form the current in the battery, while the voltage drop is 12 volts across each bulb and they all glow. In a series circuit, every device must function for the circuit to be complete. If one bulb burns out in a series circuit, the entire circuit is broken.

  3. Multiway switching - Wikipedia

    en.wikipedia.org/wiki/Multiway_switching

    The switches are then connected to each other by a pair of wires called "travelers" (or "strappers" in the UK), and the lamp is connected to the common terminal of the second switch, as shown. Using the traveler system, there are four possible permutations of switch positions: two with the light on and two with the light off.

  4. Shunt (electrical) - Wikipedia

    en.wikipedia.org/wiki/Shunt_(electrical)

    If connected in series with the circuit it simply prevents reversed current, but if connected in parallel it can shunt the reversed supply, causing a fuse or other current limiting circuit to open. All semiconductor diodes have a threshold voltage – typically between 0.5 volt and 1 volt – that must be exceeded before significant current ...

  5. 3-way lamp - Wikipedia

    en.wikipedia.org/wiki/3-way_lamp

    A 3-way lamp, also known as a tri-light, is a lamp that uses a 3-way light bulb to produce three levels of light in a low-medium-high configuration. A 3-way lamp requires a 3-way bulb and socket, and a 3-way switch. In 3-way incandescent light bulbs, each of the filaments operates at full voltage. Lamp bulbs with dual carbon filaments were ...

  6. DMX512 - Wikipedia

    en.wikipedia.org/wiki/DMX512

    DMX512-A uses a single pair of conductors, so can be connected using the cheaper 3-pin XLR connectors. Some manufacturers made units with three-pin XLR connectors, because of their lower cost. However, as 3-pin XLRs are commonly used for connecting microphones and sound mixing consoles , there is a risk of wrongly connecting DMX512 equipment to ...

  7. Electrical ballast - Wikipedia

    en.wikipedia.org/wiki/Electrical_ballast

    A typical 230V, 50hz series choke ballast (inductor) used in older lighting. This example is used for a tanning lamp. It requires a starter switch (below). A lamp starter, required with some inductor type ballasts. It connects the two ends of the lamp to preheat them for one second before lighting.

  8. History of electric power transmission - Wikipedia

    en.wikipedia.org/wiki/History_of_electric_power...

    It operated a 16-light Brush electric dynamo lighting several storefronts in Grand Rapids, Michigan. [13] [14] It is the earliest predecessor of Consumers Energy of Jackson, Michigan. In December 1880, Brush Electric Company set up a central station to supply a 2-mile (3.2 km) length of Broadway with arc lighting.

  9. 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.

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