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  2. Touch switch - Wikipedia

    en.wikipedia.org/wiki/Touch_switch

    A touch switch is a type of switch that only has to be touched by an object to operate. It is used in many lamps and wall switches that have a metal exterior as well as on public computer terminals. A touchscreen includes an array of touch switches on a display. A touch switch is the simplest kind of tactile sensor.

  3. File:Transistor Simple Circuit Diagram with NPN Labels.svg

    en.wikipedia.org/wiki/File:Transistor_Simple...

    Date/Time Thumbnail Dimensions User Comment; current: 16:08, 31 August 2012: 720 × 720 (7 KB): Michael9422 {{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|A simple NPN transistor amplifier circuit diagram with transistor labels.}} |Source = I created a postscript file, and converted it too SVG using the pstoedit program. |Date = ...

  4. Transistor - Wikipedia

    en.wikipedia.org/wiki/Transistor

    The bipolar junction transistor, the first type of transistor to be mass-produced, is a combination of two junction diodes and is formed of either a thin layer of p-type semiconductor sandwiched between two n-type semiconductors (an n–p–n transistor), or a thin layer of n-type semiconductor sandwiched between two p-type semiconductors (a p ...

  5. Open collector - Wikipedia

    en.wikipedia.org/wiki/Open_collector

    Open outputs configurations thus differ from push–pull outputs, which use a pair of transistors to output a specific voltage or current. These open outputs configurations are often used for digital applications when the transistor acts as a switch , to allow for logic-level conversion, wired-logic connections , and line sharing.

  6. Darlington transistor - Wikipedia

    en.wikipedia.org/wiki/Darlington_transistor

    Darlington Transistor (NPN-type) In electronics, a Darlington configuration (commonly called as a Darlington pair) is a circuit consisting of two bipolar transistors with the emitter of one transistor connected to the base of the other, such that the current amplified by the first transistor is amplified further by the second one. [1]

  7. Programmable unijunction transistor - Wikipedia

    en.wikipedia.org/wiki/Programmable_unijunction...

    A programmable unijunction transistor (PUT) is a three-lead electronic semiconductor device which is similar in its characteristics to a unijunction transistor (UJT), except that its behavior can be controlled using external components. In a UJT, the base region is divided into two parts by the emitter.

  8. ATmega328 - Wikipedia

    en.wikipedia.org/wiki/ATmega328

    ATmega328 is commonly used in many projects and autonomous systems where a simple, low-powered, low-cost micro-controller is needed. Perhaps the most common implementation of this chip is on the popular Arduino development platform, namely the Arduino Uno, Arduino Pro Mini [4] and Arduino Nano models.

  9. Touch-sensitive lamp - Wikipedia

    en.wikipedia.org/wiki/Touch-sensitive_lamp

    Video demonstrating the operation of a touch-sensitive lamp. A touch-sensitive lamp is a combination of a lamp and a touch switch. They act on the principle of body capacitance, activated by human touch rather than a flip, push-button, or other mechanical switch. They are popular as desk and nightstand lamps. Touch-sensitive lamp switches may ...

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