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  2. List of electronic color code mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_electronic_color...

    Silver. ±10%. None. ±20%. The first letter of the color code is matched by order of increasing magnitude. The electronic color codes, in order, are: 0 = B lack. 1 = B rown. 2 = R ed.

  3. Electronic color code - Wikipedia

    en.wikipedia.org/wiki/Electronic_color_code

    A 2.26 kΩ, 1%-precision resistor with 5 color bands (), from top, 2-2-6-1-1; the last two brown bands indicate the multiplier (×10) and the tolerance (1%).. An electronic color code or electronic colour code (see spelling differences) is used to indicate the values or ratings of electronic components, usually for resistors, but also for capacitors, inductors, diodes and others.

  4. Universal Electronic Test Chart - Wikipedia

    en.wikipedia.org/.../Universal_Electronic_Test_Chart

    UEIT - Universal Electronic Test Chart ( russian: УЭИТ - Универсальная электронная испытательная таблица) is a Soviet / Russian test card, designed to test TVs operating in the analogue SECAM colour standard. [ 1][ 2][ 3] UEIT was developed by N. G. Deryugin and V. A. Minaev at the NII Radio ...

  5. SMPTE color bars - Wikipedia

    en.wikipedia.org/wiki/SMPTE_color_bars

    A precursor to the SMPTE test pattern was conceived by Norbert D. Larky (1927–2018) [5] [6] and David D. Holmes (1926–2006) [7] [8] of RCA Laboratories and first published in RCA Licensee Bulletin LB-819 on February 7, 1951. U.S. patent 2,742,525 Color Test Pattern Generator (now expired) was awarded on April 17, 1956, to Larky and Holmes. [9]

  6. Test tube - Wikipedia

    en.wikipedia.org/wiki/Test_tube

    Vacutainer. Boiling tube. Centrifuge tube. A test tube, also known as a culture tube or sample tube, is a common piece of laboratory glassware consisting of a finger-like length of glass or clear plastic tubing, open at the top and closed at the bottom. Test tubes are usually placed in special-purpose racks .

  7. 25-pair color code - Wikipedia

    en.wikipedia.org/wiki/25-pair_color_code

    A common application of the 25-pair color code is the cabling for the Registered Jack interface RJ21, which uses a female 50-pin miniature ribbon connector, as shown in the following table. The geometry of the pins of the receptacle (right hand image) corresponds to the pin numbers of the table.

  8. Test tube holder - Wikipedia

    en.wikipedia.org/wiki/Test_tube_holder

    A test tube holder is used to hold test tubes. [ 1] It is used for holding a test tube in place [ 2] when the tube is hot or should not be touched. [ 3] For example, a test tube holder can be used to hold a test tube while it is being heated. [ 4] Moreover, when heating the tube with liquid or solid contained inside, the holder ought to tightly ...

  9. Electrical wiring - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring

    Electrical wiring is an electrical installation of cabling and associated devices such as switches, distribution boards, sockets, and light fittings in a structure. Wiring is subject to safety standards for design and installation. Allowable wire and cable types and sizes are specified according to the circuit operating voltage and electric ...