A schematic is a diagram that represents the elements of a system using abstract, graphic symbols rather than realistic pictures. A schematic usually omits all details that are not relevant to the information the schematic is intended to convey, and may add unrealistic elements that aid comprehension. For example, a subway map intended for riders may represent a subway station with a dot; the dot doesn't resemble the actual station at all but gives the viewer the information he needs without unnecessary visual clutter. A schematic diagram of a chemical process uses symbols to represent the vessels, piping, valves, pumps, and other equipment of the system, emphasizing their interconnection paths and suppressing physical details. In an electronic circuit diagram, the layout of the symbols may not resemble the layout in the physical circuit. In the schematic diagram, the symbolic elements are arranged to be more easily interpreted by the viewer.

Electrical and electronic industry

In electronic design automation, until the 1980s schematics were virtually the only formal representation for circuits. More recently, with the progress of computer technology, other representations were introduced and specialized computer languages were developed, since with the explosive growth of the complexity of electronic circuits, traditional schematics are becoming less practical. For example, hardware description languages are indispensable for modern digital circuit design.

Schematics for electronic circuits are prepared by designers using EDA (Electronic Design Automation) tools called schematic capture tools or schematic entry tools. These tools go beyond simple drawing of devices and connections. Usually they are integrated into the whole IC design flow and linked to other EDA tools for verification and simulation of the circuit under design.

In electric power systems design, a schematic drawing called a one-line diagram is frequently used to represent substations, distribution systems or even whole electrical power grids. These diagrams simplify and compress the details that would be repeated on each phase of a three-phase system, showing only one element instead of three.

Schematics in repair manuals

Schematic diagrams are used extensively in repair manuals to help users understand the relative position of parts and to provide graphical instruction to assist in taking apart and rebuilding mechanical assemblies. Many automotive and motorcycle repair manuals devote a significant number of pages to schematic diagrams.

ee also

* Circuit diagram
* Energy Systems Language
* chart, diagram
* straight-line diagram

External links

* [ WebEE Schematics and Projects ] Many Circuits and Electronic Projects.
* [ Discover Circuits ] Large collection of electronic circuit schematics.

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  • schematic — SCHEMÁTIC, Ă, schematici, ce, adj. Construit, alcătuit în linii generale, fără prezentarea amănuntelor. ♦ (depr.) Care nu depăşeşte anumite tipare, anumite şabloane; fără adâncime, superficial; rigid, dogmatic. – Din fr. schématique. Trimis de… …   Dicționar Român

  • schematic — [skē mat′ik, skəmat′ik] adj. [ModL schematicus] of, or having the nature of, a scheme, schema, plan, diagram, etc. n. a schematic diagram, as of electrical wiring in a circuit schematically adv …   English World dictionary

  • Schematic — Sche*mat ic, a. [Cf. Gr. ? pretended.] Of or pertaining to a scheme or a schema. [1913 Webster] …   The Collaborative International Dictionary of English

  • schematic — (adj.) pertaining to schemes, 1701, from SCHEME (Cf. scheme) (q.v.). Noun meaning diagram is first attested 1929 …   Etymology dictionary

  • schematic — [adj] diagrammatic delineative, graphic, illustrative, representational, simplified, symbolic; concept 625 …   New thesaurus

  • schematic — ► ADJECTIVE 1) (of a diagram or representation) symbolic and simplified. 2) (of thought, ideas, etc.) simplistic or formulaic in character. DERIVATIVES schematically adverb …   English terms dictionary

  • schematic — [[t]skiːmæ̱tɪk[/t]] ADJ GRADED: usu ADJ n A schematic diagram or picture shows something in a simple way. This is represented in the schematic diagram below. ...a schematic picture of the solar system. Derived words: schematically… …   English dictionary

  • schematic — [ski: matɪk, skɪ ] adjective 1》 (of a diagram or representation) symbolic and simplified. 2》 (of thought, ideas, etc.) simplistic or formulaic in character: a highly schematic reading of the play. noun technical a schematic diagram, in particular …   English new terms dictionary

  • schematic — adjective in the form of a basic plan or arrangement: a schematic outline | a schematic diagram of DNA …   Longman dictionary of contemporary English

  • schematic — I. adjective Etymology: New Latin schematicus, from Greek schēmat , schēma Date: 1701 of or relating to a scheme or schema • schematically adverb II. noun Date: 1929 a schematic drawing or diagram …   New Collegiate Dictionary

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