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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. 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.

  4. 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]

  5. 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 = ...

  6. Sample and hold - Wikipedia

    en.wikipedia.org/wiki/Sample_and_hold

    A typical sample and hold circuit stores electric charge in a capacitor and contains at least one switching device such as a FET (field effect transistor) switch and normally one operational amplifier. [2] To sample the input signal, the switch connects the capacitor to the output of a buffer amplifier. The buffer amplifier charges or ...

  7. Digital model railway control systems - Wikipedia

    en.wikipedia.org/wiki/Digital_model_railway...

    The receiver is essentially a transistor throttle built right into the locomotive. The command station is not expandable beyond 16 channels. CTC-16 was completely compatible with the Digitrack 1600 receivers, as it was an improved and cost reduced version of the Digitrack 1600.

  8. Transistor–transistor logic - Wikipedia

    en.wikipedia.org/wiki/Transistortransistor_logic

    Transistortransistor logic (TTL) is a logic family built from bipolar junction transistors.Its name signifies that transistors perform both the logic function (the first "transistor") and the amplifying function (the second "transistor"), as opposed to earlier resistor–transistor logic (RTL) and diode–transistor logic (DTL).

  9. 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.