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  2. Coupon (PWB) - Wikipedia

    en.wikipedia.org/wiki/Coupon_(PWB)

    A coupon or test coupon is a printed circuit board (PCB) used to test the quality of a printed wiring board (PWB) fabrication process. Test coupons are fabricated on the same panel as the PWBs, typically at the edges. Coupons are then inspected to ensure proper layer alignment, electrical connectivity, and cross sectioned to inspect internal ...

  3. List of electronic component packaging types - Wikipedia

    en.wikipedia.org/wiki/List_of_electronic...

    SOT: Small-outline transistor (also SOT-23, SOT-223, SOT-323). TO-XX: wide range of small pin count packages often used for discrete parts like transistors or diodes. TO-3: Panel-mount with leads; TO-5: Metal can package with radial leads; TO-18: Metal can package with radial leads; TO-39; TO-46; TO-66: Similar shape to the TO-3 but smaller

  4. 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.

  5. Printed circuit board - Wikipedia

    en.wikipedia.org/wiki/Printed_circuit_board

    Through-hole (leaded) resistors Through-hole devices mounted on the circuit board of a mid-1980s Commodore 64 home computer A box of drill bits used for making holes in printed circuit boards. While tungsten-carbide bits are very hard, they eventually wear out or break. Drilling is a considerable part of the cost of a through-hole printed ...

  6. Solid Logic Technology - Wikipedia

    en.wikipedia.org/wiki/Solid_Logic_Technology

    SLT used silicon planar glass-encapsulated transistors and diodes. [2] SLT uses dual diode chips and individual transistor chips each approximately 0.025 inches (0.64 mm) square. [3]: 15 The chips are mounted on a 0.5 inches (13 mm) square substrate with silk-screened resistors and printed connections. The whole is encapsulated to form a 0.5 ...

  7. Solid-state electronics - Wikipedia

    en.wikipedia.org/wiki/Solid-state_electronics

    The first transistor hi-fi system was developed by engineers at GE and demonstrated at the University of Philadelphia in 1955. [9] In terms of commercial production, The Fisher TR-1 was the first "all transistor" preamplifier, which became available mid-1956. [10] In 1961, a company named Transis-tronics released a solid-state amplifier, the ...

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