Electronic symbol: Difference between revisions

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These symbols are standardized, and various organizations, such as the International Electrotechnical Commission (IEC) and the Institute of Electrical and Electronics Engineers (IEEE), provide guidelines for their use. It's essential to understand these symbols when reading or creating circuit diagrams to design and troubleshoot electronic circuits. The following is a selection of some of the most common symbols.
These symbols are standardized, and various organizations, such as the International Electrotechnical Commission (IEC) and the Institute of Electrical and Electronics Engineers (IEEE), provide guidelines for their use. It's essential to understand these symbols when reading or creating circuit diagrams to design and troubleshoot electronic circuits. The following is a selection of some of the most common symbols.


A reference designator is a component label on a schematic diagram to identify and differentiate between components. It usually consists of a letter indicating the type of component (e.g., "R" for resistor, "C" for capacitor, "D" for diode) followed by a unique number, such as "R1," "C2," or "D3".
A reference designator is a component label on a schematic diagram to identify and differentiate between components. It usually consists of a letter indicating the type of component (e.g., "R" for resistor, "C" for capacitor, "D" for diode) followed by a unique number, such as "R1," "C2," or "D3".


{| class="wikitable"
{| class="wikitable"
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| Transformer with two secondary windings||T|| — || colspan="2" |[[File:Transformer two secondary windings.svg|70px|center]]
| Transformer with two secondary windings||T|| — || colspan="2" |[[File:Transformer two secondary windings.svg|70px|center]]
|-
|-
| Quartz crystal||Y or XTAL||Herz|| colspan="2" |[[File:Crystal-oscillator-IEC-Symbol.svg|70px|center]]
| Quartz crystal||X or XTAL||Herz|| colspan="2" |[[File:Crystal-oscillator-IEC-Symbol.svg|70px|center]]
|-
|-
| Diode||D|| — ||[[File:Diode01.svg|70px|center]]||[[File:Diode01s.svg|70px|center]]
| Diode||D|| — ||[[File:Diode01.svg|70px|center]]||[[File:Diode01s.svg|70px|center]]
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| Schottky diode|| D or SD|| — ||[[File:Diode09.svg|70px|center]]||[[File:Diode09s.svg|70px|center]]
| Schottky diode|| D or SD|| — ||[[File:Diode09.svg|70px|center]]||[[File:Diode09s.svg|70px|center]]
|-
|-
| Zener diode||ZD|| — ||[[File:Zener diode symbol-2.svg|70px|center]]||[[File:Symbol Z-Diode.svg|100px|center]]
| Zener diode||Z or D|| — ||[[File:Zener diode symbol-2.svg|70px|center]]||[[File:Symbol Z-Diode.svg|100px|center]]
|-
|-
| Varactor diode||VD or D|| — ||[[File:Diode06.svg|70px|center]]||[[File:Diode06s.svg|70px|center]]
| Varactor diode||VD or D|| — ||[[File:Diode06.svg|70px|center]]||[[File:Diode06s.svg|70px|center]]
|-
|-
| LED||LED|| — ||[[File:Diode08.svg|70px|center]]||[[File:Symbol_LED.svg|70px|center]]
| LED||D or LED|| — ||[[File:Diode08.svg|70px|center]]||[[File:Symbol_LED.svg|70px|center]]
|-
|-
| NPN bipolar junction transistor||Q|| — ||[[File:BJT NPN symbol (case, unlabelled).svg|50px|center]]||[[File:Transistor symbol npn no circle.svg|50px|center]]
| NPN bipolar junction transistor||Q|| — ||[[File:BJT NPN symbol (case, unlabelled).svg|50px|center]]||[[File:Transistor symbol npn no circle.svg|50px|center]]
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| P-channel JFET||Q|| — || colspan="2" |[[File:JFET P-Channel.svg|70px|center]]
| P-channel JFET||Q|| — || colspan="2" |[[File:JFET P-Channel.svg|70px|center]]
|-
|-
| Operational Amplifier||U (with type)|| — || colspan="2" |[[File:Op-amp symbol simplified.svg|100px|center]]
| Operational Amplifier||U (for any IC)|| — || colspan="2" |[[File:Op-amp symbol simplified.svg|100px|center]]
|-
|-
| Microphone, IEEE and IEC style||MIC||Ohm||[[File:IEEE MIC.svg|50px|center]]||[[File:IEC MIC.svg|50px|center]]
| Microphone, IEEE and IEC style||MIC||Ohm||[[File:IEEE MIC.svg|50px|center]]||[[File:IEC MIC.svg|50px|center]]
|-
|-
| Loudspeaker||SPKR||Ohm|| colspan="2" |[[File:IEEE Loudspeaker.svg|50px|center]]
| Loudspeaker||LS or SPKR||Ohm|| colspan="2" |[[File:IEEE Loudspeaker.svg|50px|center]]
|-
|-
| Single cell and battery||B or BAT||Volt||[[File:Battery symbol1.svg|50px|center]]||[[File:Battery symbol2.svg|50px|center]]
| Single cell and battery||B or BAT||Volt||[[File:Battery symbol1.svg|50px|center]]||[[File:Battery symbol2.svg|50px|center]]
|-
|-
| Incandescent light bulb||FIL||Watt|| colspan="2" |[[File:Lamp symbol.svg|100px|center]]
| Incandescent light bulb||L or FIL||Watt|| colspan="2" |[[File:Lamp symbol.svg|100px|center]]
|-
|-
| Voltmeter and ammeter||V and A|| ||[[File:Symbole voltmetre.png|100px|center]]||[[File:Symbole amperemetre.png|100px|center]]
| Voltmeter and ammeter||V and A|| ||[[File:Symbole voltmetre.png|100px|center]]||[[File:Symbole amperemetre.png|100px|center]]

Revision as of 23:39, 13 June 2024

Electronic symbols are graphical representations used to depict electronic components, devices, and circuits in circuit diagrams and schematics. These symbols help engineers, technicians, and hobbyists communicate and understand the design and functionality of electronic circuits. Electronic symbols should be intuitive, allowing users to grasp their meaning at a glance.

Examples of electronic symbols

These symbols are standardized, and various organizations, such as the International Electrotechnical Commission (IEC) and the Institute of Electrical and Electronics Engineers (IEEE), provide guidelines for their use. It's essential to understand these symbols when reading or creating circuit diagrams to design and troubleshoot electronic circuits. The following is a selection of some of the most common symbols.

A reference designator is a component label on a schematic diagram to identify and differentiate between components. It usually consists of a letter indicating the type of component (e.g., "R" for resistor, "C" for capacitor, "D" for diode) followed by a unique number, such as "R1," "C2," or "D3".

Component Reference designator Unit Symbol
Resistor, IEEE and IEC style R Ohm
Potentiometer, IEEE and IEC style RV Ohm
Trimmer resistor, IEC style RT Ohm
Capacitor C Farad
Polarised capacitor C Farad
Variable capacitor CV Farad
Trimmer capacitor CT Farad
Inductor L Henry
Magnetic core inductor L Henry
Transformer with two secondary windings T  — 
Quartz crystal X or XTAL Herz
Diode D  — 
Schottky diode D or SD  — 
Zener diode Z or D  — 
Varactor diode VD or D  — 
LED D or LED  — 
NPN bipolar junction transistor Q  — 
PNP bipolar junction transistor Q  — 
N-channel JFET Q  — 
P-channel JFET Q  — 
Operational Amplifier U (for any IC)  — 
Microphone, IEEE and IEC style MIC Ohm
Loudspeaker LS or SPKR Ohm
Single cell and battery B or BAT Volt
Incandescent light bulb L or FIL Watt
Voltmeter and ammeter V and A
Push-to-make switch, push-to break switch, IEEE style SW (with type)  — 
SPST and SPDT switch SW (with type)  — 
DPST and DPDT switch SW (with type)  — 
DPST and DPDT relay K (with type)  — 
TS and TRS jack socket TS and TRS  — 
DC barrel connector, positive tip J  — 
Voltage source and current source V and I  — 
Fuse, IEEE and IEC style F Amp
Antenna A  — 
Earth GND or EARTH  — 
Chassis ground GND or CHASSIS  — 
Wires crossing and junction  —   — 

External links

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