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  2. List of 7400-series integrated circuits - Wikipedia

    en.wikipedia.org/wiki/List_of_7400-series...

    Most AOI chips are currently obsolete. 74LS51 pinout diagram TI SN74LS51 in DIP-14 package See also: Logic gate , Logic level , and Logic family Since there are numerous 7400-series parts, the following groups related parts to make it easier to pick a useful part number.

  3. Reference designator - Wikipedia

    en.wikipedia.org/wiki/Reference_designator

    It breaks down a system into units, and then any number of sub-assemblies. The unit is the highest level of demarcation in a system and is always a numeral. Subsequent demarcation are called assemblies and always have the Class Letter "A" as a prefix following by a sequential number starting with 1.

  4. Relay logic - Wikipedia

    en.wikipedia.org/wiki/Relay_logic

    The schematic diagrams for relay logic circuits are often called line diagrams, because the inputs and outputs are essentially drawn in a series of lines. A relay logic circuit is an electrical network consisting of lines, or rungs, in which each line or rung must have continuity to enable the output device.

  5. Block diagram - Wikipedia

    en.wikipedia.org/wiki/Block_diagram

    A block diagram is a diagram of a system in which the principal parts or functions are represented by blocks connected by lines that show the relationships of the blocks. [1] They are heavily used in engineering in hardware design , electronic design , software design , and process flow diagrams .

  6. As Elon Musk eyes Defense Department, conflicts of interest ...

    www.aol.com/elon-musk-eyes-defense-department...

    Defense policy experts say the Pentagon's $850 billion budget is in sore need of oversight – investigators regularly uncover billions of dollars of waste and the department's disjointed ...

  7. UML state machine - Wikipedia

    en.wikipedia.org/wiki/UML_state_machine

    The state diagram from Figure 2 is an example of an extended state machine, in which the complete condition of the system (called the extended state) is the combination of a qualitative aspect—the state variable—and the quantitative aspects—the extended state variables. The obvious advantage of extended state machines is flexibility.

  8. Single-line diagram - Wikipedia

    en.wikipedia.org/wiki/Single-line_diagram

    A typical one-line diagram with annotated power flows. Red boxes represent circuit breakers, grey lines represent three-phase bus and interconnecting conductors, the orange circle represents an electric generator, the green spiral is an inductor, and the three overlapping blue circles represent a double-wound transformer with a tertiary winding.

  9. Eye pattern - Wikipedia

    en.wikipedia.org/wiki/Eye_pattern

    In telecommunications, an eye pattern, also known as an eye diagram, is an oscilloscope display in which a digital signal from a receiver is repetitively sampled and applied to the vertical input (y-axis), while the data rate is used to trigger the horizontal sweep (x-axis). It is so called because, for several types of coding, the pattern ...