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  2. Light-emitting diode physics - Wikipedia

    en.wikipedia.org/wiki/Light-emitting_diode_physics

    The inner workings of an LED, showing circuit (top) and band diagram (bottom) The p–n junction in any direct band gap material emits light when electric current flows through it. This is electroluminescence. Electrons cross from the n-region and recombine with the holes existing in the p-region.

  3. LED circuit - Wikipedia

    en.wikipedia.org/wiki/LED_circuit

    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. The voltage drop across a lit LED is approximately constant over a wide range of operating

  4. Parabolic aluminized reflector - Wikipedia

    en.wikipedia.org/wiki/Parabolic_aluminized_reflector

    As with the case of LED MR lamps, LED PAR lamps generally use an array of individual LED elements that are unsuitable for reflector operation. Nevertheless, some degree of beam control can be obtained with aperture or lens, and LED PAR 38 replacements with a 40° spread is common. Models built for stage lighting may use less similar dimensions.

  5. Equivalent circuit - Wikipedia

    en.wikipedia.org/wiki/Equivalent_circuit

    Often, an equivalent circuit is sought that simplifies calculation, and more broadly, that is a simplest form of a more complex circuit in order to aid analysis. [1] In its most common form, an equivalent circuit is made up of linear, passive elements. However, more complex equivalent circuits are used that approximate the nonlinear behavior of ...

  6. File:LED circuit.svg - Wikipedia

    en.wikipedia.org/wiki/File:LED_circuit.svg

    Simple LED circuit diagram. 01:08, 16 June 2006: 100 × 100 (13 KB) Dmccreary: Simple LED circuit diagram with power supply, LED and resistor. 02:42, 15 June 2006: 100 × 100 (13 KB) Dmccreary: Simple LED Circuit with power supply, LED and resistor.

  7. Reference designator - Wikipedia

    en.wikipedia.org/wiki/Reference_designator

    AS 1103.2-1982 - "Diagrams charts and tables for electrotechnology, Part 2: Item Designation" (Superseded by AS 3702-1989.) AS 3702-1989 - "Item designation in electrotechnology". (Equivalent to IEC 60750 Edition 1.0, 1983.) IEC 113 (Superseded by IEC 750, i.e. IEC 60750.) IEC 750-1983 (AS 3702 is equivalent, but provides extra information.)

  8. Why Prairie Dogs “Jump Yip” - AOL

    www.aol.com/why-prairie-dogs-jump-yip-153457221.html

    But today, the prairie dog’s range has shrunk to 5% of the size it was before the settlers moved across the U.S. Furthermore, two of the five species of prairie dogs are endangered: Utah and ...

  9. Opto-isolator - Wikipedia

    en.wikipedia.org/wiki/Opto-isolator

    Schematic diagram of an opto-isolator showing source of light (LED) on the left, dielectric barrier in the center, and sensor (phototransistor) on the right [note 1]. An opto-isolator (also called an optocoupler, photocoupler, or optical isolator) is an electronic component that transfers electrical signals between two isolated circuits by using light. [1]