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    Electronics and Electrical Symbols

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    mardy
    Electrical symbols are graphical representations of electrical and electronic components used in circuit diagrams. They represent components and their functionality according to operational characteristics. Symbols are defined by various national and international standards to enable anyone to read schematics easily. Common symbols represent components like resistors, capacitors, diodes, transistors and logic gates.

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    Electronics and Electrical Symbols

    Uploaded by

    mardy
    30 views10 pages
    Electrical symbols are graphical representations of electrical and electronic components used in circuit diagrams. They represent components and their functionality according to operational characteristics. Symbols are defined by various national and international standards to enable anyone to read schematics easily. Common symbols represent components like resistors, capacitors, diodes, transistors and logic gates.

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    Electrical symbols are graphical representations of electrical and electronic components used in circuit diagrams. They represent components and their functionality according to operational characteristics. Symbols are defined by various national and international standards to enable anyone to read schematics easily. Common symbols represent components like resistors, capacitors, diodes, transistors and logic gates.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    30 views10 pages

    Electronics and Electrical Symbols

    Uploaded by

    mardy
    Electrical symbols are graphical representations of electrical and electronic components used in circuit diagrams. They represent components and their functionality according to operational characteristics. Symbols are defined by various national and international standards to enable anyone to read schematics easily. Common symbols represent components like resistors, capacitors, diodes, transistors and logic gates.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 10

    Electronics and Electrical Symbols

    Electrical symbols are a graphical representation of basic electrical and


    electronic devices or components. These Symbols are used in circuit and
    electrical diagrams to recognize a component. It is also called a schematic
    symbol. Each component has typical functionality according to its operational
    characteristics.

    An electronic circuit or schematic drawing uses a wired path between electronic


    components to complete the circuit. These components are represented by
    respective symbols for it.

    Electrical and electronic symbols used in circuits are defined with various
    national and international standards. E.g. IEC standard, JIC standard, ANSI
    standard, IEEE standard, etc.,

    Though electrical symbols are standardized, may vary from country to country,
    or engineering disciplines, based on traditional conventions.

    This enables anyone to read electrical circuits or Electrical schematic diagrams


    and floor plans with ease and clarity.

    Electrical symbols represent the components of electrical and electronic circuits


    and do not define any function or process unless the circuit is implemented with
    components being physically used. (E.g. the circuit on breadboard or assembled
    printed circuit board)

    There is a circuit symbol for each, and every electrical component or device
    used in a circuit such as passive components, active components, measuring
    instruments, logic gates, etc.

    A few electronic symbols that can be used in the circuit diagrams are given
    below for reference:

    Wire Symbols

    Electrical wire
    Connected wires

    Not Connected wires

    Ground Symbols

    Earth Ground

    Chassis Ground

    Digital/Common Ground

    Inductor/Coil Symbols

    Inductor
    Iron Core Inductor

    Variable Inductor

    Definition of an Inductor: It is a device that temporarily stores energy in the


    form of a magnetic field.

    Lamp/Light Bulb Symbols

    Lamp / light bulb

    Lamp / light bulb

    Lamp / light bulb

    Switch and Relay Symbols

    SPST Toggle Switch


    SPDT Toggle Switch

    Jumper

    DIP Switch

    Pushbutton Switch (N.C)

    Pushbutton Switch (N.O)

    SPST Relay/SPDT Relay

    Solder Bridge

    Definition of a Relay: It controls circuits by opening and closing contacts in


    another circuit. Relays switches are used to open and close circuits
    electromechanically or electronically.

    Resistor Symbols

    Resistor (IEEE)/ Resistor (IEC)


    Potentiometer (IEEE)/(IEC)

    Variable Resistor / Rheostat (IEEE)/(IEC)

    Trimmer Resistor

    Thermistor

    Photoresistor / Light-dependent resistor (LDR)

    Definition of a Resistor: As the name suggests, they resist the flow of


    excessive electrical power or voltage passing through the circuit, in a precise
    and controlled manner.

    Capacitor Symbols

    Capacitor

    Polarized Capacitor
    Variable Capacitor

    Definition of a Capacitor: It is a device that is used to store electrical energy


    in an electric field. It is a passive electronic component.

    Antenna Symbols

    Antenna / aerial

    Antenna / aerial

    Dipole Antenna

    Definition of an Antenna: It is an electrical device that converts electric


    power into radio waves and vice versa.

    Power Supply Symbols

    Voltage Source/ Current Source

    Battery Cell/ Battery


    Controlled voltage source/Controlled Current source

    AC voltage source/Generator

    Meter Symbols

    Voltmeter/Ammeter

    Ohmmeter/Wattmeter

    Diode/LED Symbols

    Diode/Zener Diode

    Tunnel Diode/Light Emitting Diode

    Schottky Diode/Varicap Diode

    Photodiode
    Definition of a LED: It is a semiconductor device that emits light when an
    electric current is passed through it.

    Transistor Symbols

    NPN Bipolar Transistor/ PNP Bipolar Transistor

    NMOS/PMOS Transistor

    JFET-N Transistor/ JFET-P Transistor

    Darlington Transistor

    Definition of a Transistor: It is a semiconductor device used to amplify or


    switch electronic signals and electrical power.

    Miscellaneous Symbols

    Motor/ Transformer
    Fuse

    Electric bell/Buzzer

    Microphone / Loudspeaker

    Op-amp /Schmitt trigger

    Bus

    Bus

    Analog-to-Digital Converter (ADC)

    Digital-to-Analog Converter (DAC)

    Optocoupler
    Crystal Oscillator

    Logic Gate Symbols

    AND /NAND Gate

    XOR Gate / NOT Gate

    OR /NOR Gate

    D flip flop /Multiplexer(MUX) 2 to 1

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