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  2. Pull-up resistor - Wikipedia

    en.wikipedia.org/wiki/Pull-up_resistor

    In electronic logic circuits, a pull-up resistor (PU) or pull-down resistor (PD) is a resistor used to ensure a known state for a signal. [1] It is typically used in combination with components such as switches and transistors , which physically interrupt the connection of subsequent components to ground or to V CC .

  3. Pink noise - Wikipedia

    en.wikipedia.org/wiki/Pink_noise

    A two-dimensional pink noise grayscale image, generated with a computer program; some fields observed in nature are characterized by a similar power spectrum [1] A 3D pink noise image, generated with a computer program, viewed as an animation in which each frame is a 2D slice

  4. Relay - Wikipedia

    en.wikipedia.org/wiki/Relay

    A relay allows circuits to be switched by electrical equipment: for example, a timer circuit with a relay could switch power at a preset time. For many years relays were the standard method of controlling industrial electronic systems. A number of relays could be used together to carry out complex functions (relay logic). The principle of relay ...

  5. File:Resistor Color Code.svg - Wikipedia

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

    File:Resistor Color Code.svg. ... English: The picture illustrates how the value of electronic resistors is encoded using colored bands on the components body.

  6. Glossary of physics - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_physics

    An electronic device that can increase the power of a signal (a time-varying voltage or current). It is a two-port electronic circuit that uses electric power from a power supply to increase the amplitude of a signal applied to its input terminals

  7. Electrical ballast - Wikipedia

    en.wikipedia.org/wiki/Electrical_ballast

    For simple, low-powered loads such as a neon lamp, a fixed resistor is commonly used.Because the resistance of the ballast resistor is large it determines the current in the circuit, even in the face of negative resistance introduced by the neon lamp.

  8. Multimeter - Wikipedia

    en.wikipedia.org/wiki/Multimeter

    The meter comprised a moving coil meter, voltage and precision resistors, and switches and sockets to select the range. The first Avometer had a sensitivity of 60 Ω/V, three direct current ranges (12 mA, 1.2 A, and 12 A), three direct voltage ranges (12, 120, and 600 V or optionally 1,200 V), and a 10,000 Ω resistance range.

  9. Electron affinity - Wikipedia

    en.wikipedia.org/wiki/Electron_affinity

    In group 18, the valence shell is full, meaning that added electrons are unstable, tending to be ejected very quickly. Counterintuitively, E ea does not decrease when progressing down most columns of the periodic table. For example, E ea actually increases consistently on descending the column for the group 2 data. Thus, electron affinity ...