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  2. Reference designator - Wikipedia

    en.wikipedia.org/wiki/Reference_designator

    A reference designator unambiguously identifies the location of a component within an electrical schematic or on a printed circuit board.The reference designator usually consists of one or two letters followed by a number, e.g. C3, D1, R4, U15.

  3. Electronic symbol - Wikipedia

    en.wikipedia.org/wiki/Electronic_symbol

    Wire crossover symbols for circuit diagrams. The CAD symbol for insulated crossing wires is the same as the older, non-CAD symbol for non-insulated crossing wires. To avoid confusion, the wire "jump" (semi-circle) symbol for insulated wires in non-CAD schematics is recommended (as opposed to using the CAD-style symbol for no connection), so as to avoid confusion with the original, older style ...

  4. IEC 81346 - Wikipedia

    en.wikipedia.org/wiki/IEC_81346

    Upgrading form TS to IS implies greater maturity and more scrutiny in the development of the standard. [ 15 ] Supporting 81346-10:2022 is a planned supplementary document. 81346-101 "Modelling concepts and guidelines for power supply systems" is a proposed TS (Technical Specification) currently in committee stage of development.

  5. Thermistor - Wikipedia

    en.wikipedia.org/wiki/Thermistor

    A thermistor is a semiconductor type of resistor whose resistance is strongly dependent on temperature, more so than in standard resistors. The word thermistor is a portmanteau of thermal and resistor. Thermistors are categorized based on their conduction models.

  6. Piping and instrumentation diagram - Wikipedia

    en.wikipedia.org/wiki/Piping_and_instrumentation...

    For the function Measurement the reference designator B is used, followed by the above listed letter for the measured variable. For reference designation of any equipment in a power station the KKS Power Plant Classification System can be applied.

  7. Steinhart–Hart equation - Wikipedia

    en.wikipedia.org/wiki/Steinhart–Hart_equation

    is a reference (standard) resistance value. The Steinhart–Hart equation assumes is 1 ohm. The curve fit is much less accurate when it is assumed = and a different value of such as 1 kΩ is used. However, using the full set of coefficients avoids this problem as it simply results in shifted parameters.

  8. E series of preferred numbers - Wikipedia

    en.wikipedia.org/wiki/E_series_of_preferred_numbers

    Calculate the closest component value to any E-series with an Excel User Defined Function. Calculate standard resistor values in Excel – EDN magazine; Printable E series tables. E6 to E96 Table – Servenger; E3 to E192 Table – Vishay

  9. Mullard–Philips tube designation - Wikipedia

    en.wikipedia.org/wiki/Mullard–Philips_tube...

    Two or more elements in a single envelope were handled by adding letters after the heater identifier, in alphabetical order, so an ECH35 is a 6.3 volt heated triode plus a hexode with an octal base; a PABC80 is a Noval 300mA series-heater combination of a single low-power diode A, a pair of diodes with common cathode B, and a triode C.

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