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  2. Pull switch - Wikipedia

    en.wikipedia.org/wiki/Pull_switch

    The most common use of a pull switch is to operate a ceiling electric light.The ceiling fan and mechanical wall fans are also appliances often operated by pull switches. . Pull switches may be either two-position (open or closed) or multi-position (allowing for different fan speeds or levels of illuminati

  3. Pull-up resistor - Wikipedia

    en.wikipedia.org/wiki/Pull-up_resistor

    When the switch is open the voltage of the gate input is pulled up to the level of Vin. When the switch is closed, the input voltage at the gate goes to ground. 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]

  4. Arrow keys - Wikipedia

    en.wikipedia.org/wiki/Arrow_keys

    The main reason for this arrangement is that the arrow keys are not ergonomic to use with a right-handed mouse. During the early days of gaming, this was not a problem as the mouse was not used; the arrow keys controlled both movement ↑ ↓ as well as looking around ← →, with strafing done using modifier keys (usually Alt + ← →).

  5. Pressure switch - Wikipedia

    en.wikipedia.org/wiki/Pressure_switch

    A pressure switch is a form of switch that operates an electrical contact when a certain set fluid pressure has been reached on its input. The switch may be designed to make contact either on pressure rise or on pressure fall. Pressure switches are widely used in industry to automatically supervise and control systems that use pressurized fluids.

  6. Sound effect - Wikipedia

    en.wikipedia.org/wiki/Sound_effect

    Foley sound effects are sounds that synchronize on screen, and require the expertise of a Foley artist to record properly. Footsteps, the movement of hand props (e.g., a tea cup and saucer), and the rustling of cloth are common Foley units. [2] Design sound effects are