An electronic symbol is a

pictogram A pictogram (also pictogramme, pictograph, or simply picto) is a graphical symbol that conveys meaning through its visual resemblance to a physical object. Pictograms are used in systems of writing and visual communication. A pictography is a wri ...

used to represent various

electrical Electricity is the set of physical phenomena associated with the presence and motion of matter possessing an electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwel ...

and electronic devices or functions, such as

wire file:Sample cross-section of high tension power (pylon) line.jpg, Overhead power cabling. The conductor consists of seven strands of steel (centre, high tensile strength), surrounded by four outer layers of aluminium (high conductivity). Sample d ...

s, batteries,

resistor A resistor is a passive two-terminal electronic component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active e ...

s, and

transistor A transistor is a semiconductor device used to Electronic amplifier, amplify or electronic switch, switch electrical signals and electric power, power. It is one of the basic building blocks of modern electronics. It is composed of semicondu ...

s, in a

schematic diagram A schematic, or schematic diagram, is a designed representation of 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 key information the sc ...

of an electrical or

electronic circuit An electronic circuit is composed of individual electronic components, such as resistors, transistors, capacitors, inductors and diodes, connected by conductive wires or Conductive trace, traces through which electric current can flow. It is a t ...

. These symbols are largely standardized internationally today, but may vary from country to country, or engineering discipline, based on traditional conventions.

Standards for symbols

The graphic symbols used for electrical components in

circuit diagram A circuit diagram (or: wiring diagram, electrical diagram, elementary diagram, electronic schematic) is a graphical representation of an Electrical network, electrical circuit. A pictorial circuit diagram uses simple images of components, whil ...

s are covered by national and international standards, in particular: *

IEC The International Electrotechnical Commission (IEC; ) is an international standards organization that prepares and publishes international standards for all electrical, electronic and related technologies. IEC standards cover a vast range of ...

60617 (also known as BS 3939). * There is also

IEC 61131-3 IEC 61131-3 is the third part (of 10) of the international standard IEC 61131 for programmable logic controllers. It was first published in December 1993 by the IEC; the current (fourth) edition was published in May 2025. Part 3 of ''IEC 61131' ...

– for ladder-logic symbols. * JIC JIC (Joint Industrial Council) symbols as approved and adopted by the NMTBA (National Machine Tool Builders Association). They have been extracted from the Appendix of the NMTBA Specification EGPl-1967. *

ANSI The American National Standards Institute (ANSI ) is a private nonprofit organization that oversees the development of voluntary consensus standards for products, services, processes, systems, and personnel in the United States. The organiz ...

Y32.2-1975 (also known a
IEEE Std 315-1975
or CSA Z99-1975). *

IEEE The Institute of Electrical and Electronics Engineers (IEEE) is an American 501(c)(3) organization, 501(c)(3) public charity professional organization for electrical engineering, electronics engineering, and other related disciplines. The IEEE ...

Std 91/91a: graphic symbols for logic functions (used in digital electronics). It is referenced in ANSI Y32.2/IEEE Std 315. * Australian Standard AS 1102 (based on a slightly modified version of

60617; withdrawn without replacement with a recommendation to use IEC 60617). The standards do not all agree, and use of unusual (even if standardized) symbols can lead to confusion and errors.Sobering, Tim (April 2008).
''Guidelines for Drawing Schematics''
Symbols usage is sometimes idiosyncratic to engineering disciplines, and national or local variations to international standards exist. For example, lighting and power symbols used as part of architectural drawings may be different from symbols for devices used in electronics.

Common electronic symbols

Symbols shown are typical examples, not a complete list.

Traces

Wire Crossover Symbols for Circuit Diagrams

Grounds

The shorthand for ground is GND. Optionally, the triangle in the middle symbol may be filled in. File:IEEE 315 Transmission Path Symbols (75).svg, General ground (

style) File:IEEE 315 Transmission Path Symbols (80).svg, Signal/low-noise ground (the asterisk is not part of the symbol) File:IEEE 315 Transmission Path Symbols (78).svg, Chassis/Earth ground (IECstyle)

Sources

Voltage text should be placed next to each battery symbol, such as "3V". File:IEEE 315 Fundamental Items Symbols (90).svg, Battery, single-cell File:IEEE 315 Fundamental Items Symbols (92).svg, Battery, multi-cell File:IEEE 315-1975 (1993) 8.7.3.svg, Solar (photovoltaic) cell File:Voltage source 2.svg, DC voltage source File:Controlled Current source.svg, Controlled DC voltage source File:Current source.svg, Current source File:Controlled Current source 2.svg, Controlled current source File:AC voltage source.svg, AC voltage source

Resistors

It is very common for

potentiometer A potentiometer is a three- terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat. The measuring instrum ...

and

rheostat A potentiometer is a three-terminal (electronics), terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat. ...

symbols to be used for many types of variable resistors and trimmers. File:Resistor, Rheostat (variable resistor), and Potentiometer symbols.svg,

style: (a) Resistor, (b)

Rheostat A potentiometer is a three-terminal (electronics), terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat. ...

, (c)

Potentiometer A potentiometer is a three- terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat. The measuring instrum ...

/ Trimmer File:IEC resistors.svg,

style: (a) Resistor, (b) Rheostat, (c) Potentiometer / Trimmer File:IEEE 315-1975 (1993) 2.1.13.svg,

Photoresistor A photoresistor (also known as a light-dependent resistor, LDR, or photo-conductive cell) is a passive component that decreases in resistance as a result of increasing luminosity (light) on its sensitive surface, in other words, it exhibits pho ...

(ANSI) File:IEEE 315-1975 (1993) 2.1.12.1.2.svg, File:IEEE 315-1975 (1993) 2.1.6.a.svg,

Varistor A varistor (a.k.a. voltage-dependent resistor (VDR)) is a surge protecting electronic component with an electrical resistance that varies with the applied voltage. It has a nonlinear, non- ohmic current–voltage characteristic that is similar ...

(ANSI)

Capacitors

File:IEEE 315 Fundamental Items Symbols (32).svg, General capacitor (IECstyle); sometimes drawn with one plate curved File:IEEE 315 Fundamental Items Symbols (36).svg, Polarized capacitor (Americanstyle), such as electrolytic and tantalum capacitors File:IEEE 315 Fundamental Items Symbols (38).svg, Variable capacitor File:IEEE 315 Fundamental Items Symbols (41).svg, Ganged (comoving) variable capacitors (

style) File:Trimmer capacitor symbol GOST.svg, Trimmer variable capacitor

Diodes

Optionally, the triangle in these symbols may be filled in, or a line may be drawn through the triangle (less desirable). The words anode and cathode aren't part of the diode symbols. For instructional purposes, sometimes two letters (A/C or A/K) are placed next to diode symbols similar to how the letters C/B/E or D/G/S are placed next to

symbols. "K" is often used instead of "C", because the origin of the word cathode is kathodos, and to avoid confusion with "C" for

capacitors In electrical engineering, a capacitor is a device that stores electrical energy by accumulating electric charges on two closely spaced surfaces that are insulated from each other. The capacitor was originally known as the condenser, a term st ...

in silkscreen of

printed circuit board A printed circuit board (PCB), also called printed wiring board (PWB), is a Lamination, laminated sandwich structure of electrical conduction, conductive and Insulator (electricity), insulating layers, each with a pattern of traces, planes ...

s. Voltage text should be placed next to each zener and TVS diode symbol, such as "5.1V". File:Diode symbol.svg ,

Diode A diode is a two-Terminal (electronics), terminal electronic component that conducts electric current primarily in One-way traffic, one direction (asymmetric electrical conductance, conductance). It has low (ideally zero) Electrical resistance ...

(rectifier) File:Schottky diode symbol.svg ,

Schottky diode The Schottky diode (named after the German physicist Walter H. Schottky), also known as Schottky barrier diode or hot-carrier diode, is a semiconductor diode formed by the junction of a semiconductor with a metal. It has a low forward voltag ...

File:Zener diode symbol-2.svg ,

Zener diode A Zener diode is a type of diode designed to exploit the Zener effect to affect electric current to flow against the normal direction from anode to cathode, when the voltage across its terminals exceeds a certain characteristic threshold, the ''Z ...

File:TVS diode symbols.svg , TVS ( Transient Voltage Suppression) diode. Top is unidirectional, bottom is bidirectional. File:LED symbol.svg , LED ( Light Emitting Diode) File:Photodiode symbol.svg ,

Photodiode A photodiode is a semiconductor diode sensitive to photon radiation, such as visible light, infrared or ultraviolet radiation, X-rays and gamma rays. It produces an electrical current when it absorbs photons. This can be used for detection and me ...

File:Tunnel diode symbol.svg ,

Tunnel diode A tunnel diode or Esaki diode is a type of semiconductor diode that has effectively " negative resistance" due to the quantum mechanical effect called tunneling. It was invented in August 1957 by Leo Esaki and Yuriko Kurose when working ...

File:Varicap symbol.svg , Varicap File:Shockley diode.svg , Shockley diode File:SCR symbol.svg , SCR (

Silicon Controlled Rectifier A silicon controlled rectifier or semiconductor controlled rectifier (SCR) is a four-layer solid-state current-controlling device. The name "silicon controlled rectifier" is General Electric's trade name for a type of thyristor. The principle ...

) File:Diac-schematic-symbol.png , Diac (may be a varistor in older schematics) File:Constant Regulating Diode.png , Constant-current diode File:Symbol Opto-Isulator.svg , Opto-isolator: internal

LED A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (corresp ...

(left) and photo transistor (right)

Bridge rectifiers

There are many ways to draw a single-phase bridge rectifier symbol. Some simplified symbols don't show the internal diodes. File:Bridge Rectifier.svg, Bridge rectifier File:УГО диодного моста.svg, Bridge rectifier File:4 diodes bridge rectifier.jpg, Bridge rectifier File:Bridge Rectifier for single-phase alternating current (symbolic diagram).png, Bridge rectifier File:3 fase bridge rectifier.jpg, Three-phase bridge rectifier

Inductors

An inductor can be drawn either as a series of loops, or series of half-circles. File:Coil illustration.svg, Inductor symbol (series of loops) File:IEC Inductor.svg, Air-core

inductor An inductor, also called a coil, choke, or reactor, is a Passivity (engineering), passive two-terminal electronic component, electrical component that stores energy in a magnetic field when an electric current flows through it. An inductor typic ...

(

style) File:IEC Inductor with magnetic core.svg, Magnetic-core

(IEEEstyle) File:IEC Tapped inductor.svg, Tapped

(IECstyle) File:Ferrite bead ring.svg,

Ferrite bead A ferrite beadalso called a ferrite block, ferrite core, ferrite ring, EMI filter, or ferrite chokeis a type of choke (electronics), choke that suppresses high-frequency electronic noise in electronic circuits. Ferrite beads employ high-frequen ...

(IEEEstyle) File:Reguleeritav pool.jpg, Variable inductor File:Seadepool.jpg, Trimmer variable inductor

Transformers

Voltage text should be placed on both sides of power transformers, such as 120V (input side) and 6.3V (output side). File:Transformer Iron Core.svg,

Transformer In electrical engineering, a transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple Electrical network, circuits. A varying current in any coil of the transformer produces ...

File:Transformer center tap.svg, Transformer with center tap on secondary winding (right side) File:Transformer two secondary windings.svg, Transformer with two secondary windings (right side) File:Basic Current Transformer Symbol.svg,

Current transformer A current transformer (CT) is a type of transformer that reduces or multiplies alternating current (AC), producing a current in its secondary which is proportional to the current in its primary. Current transformers, along with voltage or poten ...

File:Zero Sequence Current Transformer Symbol.svg, Zero-sequence current transformer (ZSCT) (also known as a window-type current transformer) File:Bushing Type Current Transformer Symbol.svg, Bushing-type current transformer File:Voltage Transformer.svg, Voltage transformer

Transistors

Optionally, transistor symbols may include a circle. Note: The pin letters B/C/E and G/D/S aren't part of the transistor symbols.

Bipolar

File:IEEE 315-1975 (1993) 8.6.2.svg, NPN bipolar junction transistor (BJT) File:IEEE 315-1975 (1993) 8.6.1.svg, PNP bipolar junction transistor (BJT) File:IEEE 315-1975 (1993) 8.6.17.svg, NPN Darlington transistor File:PNP darlington.svg, PNP Darlington transistor File:PhototransistorSymbol.png, NPN

Phototransistor A photodiode is a semiconductor diode sensitive to photon radiation, such as visible light, infrared or ultraviolet radiation, X-rays and gamma rays. It produces an electrical current when it absorbs photons. This can be used for detection and me ...

Unipolar

File:IEEE 315-1975 (1993) 8.6.10.1.b.svg, N-channel junction gate field-effect transistor (JFET) File:IEEE 315-1975 (1993) 8.6.11.1.b.svg, P-channel junction gate field-effect transistor (JFET) File:IGFET N-Ch Enh Labelled simplified.svg,

Metal–oxide–semiconductor field-effect transistor upright=1.3, Two power MOSFETs in amperes">A in the ''on'' state, dissipating up to about 100 watt">W and controlling a load of over 2000 W. A matchstick is pictured for scale. In electronics, the metal–oxide–semiconductor field- ...

(MOSFET) File:Enh N channel Mosfet.svg, Enhancement mode, Nchannel

MOSFET upright=1.3, Two power MOSFETs in amperes">A in the ''on'' state, dissipating up to about 100 watt">W and controlling a load of over 2000 W. A matchstick is pictured for scale. In electronics, the metal–oxide–semiconductor field- ...

File:Enh P channel Mosfet 2.svg, Enhancement mode, Pchannel

Vacuum tubes

File:Dioda symbol.svg, Vacuum tube

diode A diode is a two-Terminal (electronics), terminal electronic component that conducts electric current primarily in One-way traffic, one direction (asymmetric electrical conductance, conductance). It has low (ideally zero) Electrical resistance ...

File:Trioda symbol.svg, Vacuum tube

triode A triode is an electronic amplifier, amplifying vacuum tube (or ''thermionic valve'' in British English) consisting of three electrodes inside an evacuated glass envelope: a heated Electrical filament, filament or cathode, a control grid, grid ...

File:Vacuum Tube Tetrode.svg, Vacuum tube

tetrode A tetrode is a vacuum tube (called ''valve'' in British English) having four active electrodes. The four electrodes in order from the centre are: a thermionic cathode, first and second grids, and a plate electrode, plate (called ''anode'' in Bri ...

(pin letters not part of symbol) File:Pentoda symbol.svg, Vacuum tube

pentode A pentode is an electronic device having five electrodes. The term most commonly applies to a three-grid amplifying vacuum tube or thermionic valve that was invented by Gilles Holst and Bernhard D.H. Tellegen in 1926. The pentode (called a ''tri ...

Switches

For multiple pole switches, a dotted or dashed line can be included to indicate two or more switch at the same time (see DPST and DPDT examples below). File:Poussoir-NO-symbol.png, Pushbutton, normally open, push-to-make (horizontal line on top) File:IEEE 315 Contacts, Switches, Contactors, and Relays Symbols (57).svg, Pushbutton, normally open, push-to-make (IEEE-style) File:IEEE 315 Contacts, Switches, Contactors, and Relays Symbols (58).svg, Pushbutton, normally closed, push-to-break (IEEE-style) File:IEEE 315 Contacts, Switches, Contactors, and Relays Symbols (59).svg, Pushbutton, normally closed, two circuits (IEEE-style) File:SPST-Switch.svg, Switch, 1P1T, SPST (single-pole single-throw) File:DPST-symbol.svg, Switch, 2P1T, DPST (double-pole single-throw) File:SPDT-Switch.svg, Switch, 1P2T, SPDT (single-pole double-throw) File:DPDT-symbol.svg, Switch, 2P2T, DPDT (double-pole double-throw) File:IEEE 315 Contacts, Switches, Contactors, and Relays Symbols (84).svg,

Rotary switch A rotary switch is a switch operated by rotation. These are often chosen when more than 2 positions are needed, such as a three-speed fan or a CB radio with multiple frequencies of reception or "channels". A rotary switch consists of a spi ...

, 1P3T,
break-before-make, nonshorting style File:IEEE 315 Contacts, Switches, Contactors, and Relays Symbols (86).svg, Rotary switch, 1P4T,
break-before-make, nonshorting style File:IEEE 315 Contacts, Switches, Contactors, and Relays Symbols (88).svg, Rotary switch, 1P4T,
make-before-break, shorting style File:IEEE 315 Contacts, Switches, Contactors, and Relays Symbols (89).svg, Slide switch, 1P4T,
make-before-break, shorting style File:Reed switch symbol.svg,

Reed switch The reed switch is an Electromechanics, electromechanical switch operated by an applied magnetic field. It was invented in 1922 by professor Valentin Kovalenkov at the Peter the Great St. Petersburg Polytechnic University#Soviet era, Petrogra ...

, normally open

Relays

Relays symbols are a combination of an inductor symbol and switch symbol. Note: The pin letters in these symbols aren't part of the standard relay symbol. File:Relay symbols.svg, SPST, SPDT, DPST, DPDT relays (Americanstyle) File:Relay-IEC.svg, SPDT relay (IECstyle)

Lamps

LED is located in the diode section. File:Neon lamp schematics.svg,

Neon lamp A neon lamp (also neon glow lamp) is a miniature gas-discharge lamp. The lamp typically consists of a small glass capsule that contains a mixture of neon and other gases at a low pressure and two electrodes (an anode and a cathode). When suffi ...

File:Indicating lamp.svg, Indicating lamp (IEEEstyle) File:Lamp symbol, old.svg,

Incandescent lamp An incandescent light bulb, also known as an incandescent lamp or incandescent light globe, is an electric light that produces illumination by Joule heating a filament until it glows. The filament is enclosed in a glass bulb that is eith ...

File:Lamp symbol.svg, Indicatory

incandescent light bulb An incandescent light bulb, also known as an incandescent lamp or incandescent light globe, is an electric light that produces illumination by Joule heating a #Filament, filament until it incandescence, glows. The filament is enclosed in a ...

File:Light bulb 3.svg, Light bulb

Current limiters

File:Fuces.svg,

fuse (b), equivalent symbols (a, c) File:Molded Case Circuit Breaker.svg, Molded-case

circuit breaker A circuit breaker is an electrical safety device designed to protect an Electrical network, electrical circuit from damage caused by current in excess of that which the equipment can safely carry (overcurrent). Its basic function is to interr ...

(MCCB) File:Fuse-basic-symbols.svg, Fuse:

(top) and American (lower two)

Voltage limiters

TVS and Zener diodes are located in the diode section. File:Symbol Surge Arrester.svg, Gas-discharge tubes (GDT) for ESD discharge File:Symbol Spark gap.svg,

Spark gap A spark gap consists of an arrangement of two Conductor (material), conducting electrodes separated by a gap usually filled with a gas such as air, designed to allow an electric spark to pass between the conductors. When the potential differenc ...

for ESD discharge

Electro-acoustic devices

Speaker symbols sometimes include an internal inductor symbol. Impedance text should be placed next to each speaker symbol, such as "8 ohms". File:IEEE Loudspeaker.svg,

Loudspeaker A loudspeaker (commonly referred to as a speaker or, more fully, a speaker system) is a combination of one or more speaker drivers, an enclosure, and electrical connections (possibly including a crossover network). The speaker driver is an ...

(IEEE-style) File:Buzzer-IEC-Symbol.svg,

Buzzer A buzzer or beeper is an audio signaling device, which may be mechanical, electromechanical, or piezoelectric (''piezo'' for short). Typical uses of buzzers and beepers include alarm devices, timers, train and confirmation of user input such ...

(IEC-style) File:IEEE MIC.svg,

Microphone A microphone, colloquially called a mic (), or mike, is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and publi ...

(IEEE-style) File:IEC MIC.svg, Microphone
(

-style)

Antennas

File:IEEE 315 Fundamental Items Symbols (55).svg, General antenna
(

-style) File:IEEE 315 Fundamental Items Symbols (58).svg, Dipole antenna
(IEC-style) File:IEEE 315 Fundamental Items Symbols (61).svg, Loop antenna
(IEC-style) File:IEEE 315 Fundamental Items Symbols (60).svg, Loop antenna
(IEEE-style)

Cables

File:IEEE 315 Transmission Path Symbols (26).svg, Cable, Shielded 1 conductor File:IEEE 315 Transmission Path Symbols (30).svg, Cable, 2 conductor File:IEEE 315 Transmission Path Symbols (29).svg, Cable, Shielded 2 conductor with shield connected to ground File:IEEE 315 Transmission Path Symbols (31).svg, Cable, 5 conductor File:IEEE 315 Transmission Path Symbols (27).svg, Cable, Shielded 5 conductor

Connectors

There are numerous connector symbol variations. File:Phone Jack Symbols.svg , Phone connectors. "A" is TS, "B" is TRS, "D" is TRS with two switches. File:UEXTPINS.svg , 5x2 shrouded header with notch key and pin names for Olimex UEXT. File:DE-9.svg , DE-9

D-subminiature The D-subminiature or D-sub is a common type of electrical connector. They are named for their characteristic D-shaped metal shield. When they were introduced, D-subs were among the smallest connectors used on computer systems. Description ...

with host side pin names for

RS-232 In telecommunications, RS-232 or Recommended Standard 232 is a standard introduced in 1960 for serial communication transmission of data. It formally defines signals connecting between a ''DTE'' (''data terminal equipment'') such as a compu ...

serial port A serial port is a serial communication Interface (computing), interface through which information transfers in or out sequentially one bit at a time. This is in contrast to a parallel port, which communicates multiple bits simultaneously in Pa ...

ICs

Logic gates

For the symbols below: A and B are inputs, Q is output. Note: These letters are not part of the symbols. There are variations of these logic gate symbols. Depending on the IC, the two-input gates below may have: 1) two or more inputs; 2) infrequently some have a second inverted output too. File:Buffer ANSI Labelled.svg,

Buffer Buffer may refer to: Science * Buffer gas, an inert or nonflammable gas * Buffer solution, a solution used to prevent changes in pH * Lysis buffer, in cell biology * Metal ion buffer * Mineral redox buffer, in geology Technology and engineeri ...

File:NOT ANSI Labelled.svg,

Inverter A power inverter, inverter, or invertor is a power electronic device or circuitry that changes direct current (DC) to alternating current (AC). The resulting AC frequency obtained depends on the particular device employed. Inverters do the op ...

(NOT) File:AND ANSI Labelled.svg, AND File:NAND ANSI Labelled.svg, NAND File:OR ANSI Labelled.svg, OR File:NOR ANSI Labelled.svg, NOR File:XOR ANSI Labelled.svg, XOR File:XNOR ANSI Labelled.svg, XNOR The above logic symbols may have additional I/O variations too: 1)

schmitt trigger In electronics, a Schmitt trigger is a comparator circuit with hysteresis implemented by applying positive feedback to the noninverting input of a comparator or differential amplifier. It is an passivity (engineering), active circuit which con ...

inputs, 2) tri-state outputs, 3) open-collector or open-drain outputs (not shown). File:Schmitt trigger symbol.svg, Buffer gate with

input File:Tristate buffer.svg, Buffer gate with tri-state output control.
(B is the tri-state control)

Flip-flops

For the symbols below: Q is output, is inverted output, E is enable input, internal triangle shape is clock input, S is Set, R is Reset (some datasheets use clear (CLR) instead of reset along the bottom). There are variations of these flip-flop symbols. Depending on the IC, a flip-flop may have: 1) one or both outputs (Q only, only, both Q & ); 2) one or both forced inputs along top & bottom (R only, S only, both R & S); 3) some inputs may be inverted. File:Inverted SR Flip-flop.svg, Simple SR flip-flop (inverted S & R inputs) File:Gated SR flip-flop Symbol.svg, Gated SR flip-flop File:Transparent Latch Symbol.svg, Gated D flip-flop (Transparent Latch) File:D-Type Flip-flop.svg, Clocked D flip-flop
(Set & Reset inputs) File:JK Flip-flop (Simple) Symbol.svg, Clocked JK flip-flop File:T-Type Flip-flop.svg, Clocked T flip-flop

OpAmps

Note: The outside text isn't part of these symbols. File:Op-amp symbol.svg,

Operational amplifier An operational amplifier (often op amp or opamp) is a direct coupling, DC-coupled Electronic component, electronic voltage amplifier with a differential input, a (usually) Single-ended signaling, single-ended output, and an extremely high gain ( ...

(opamp) File:Comparator symbol.svg, Comparator

Oscillators

Frequency text should be placed next to each oscillator symbol, such as "16MHz". File:IEEE 315 Fundamental Items Symbols (113).svg,

Crystal oscillator A crystal oscillator is an electronic oscillator Electrical circuit, circuit that uses a piezoelectricity, piezoelectric crystal as a frequency selective surface, frequency-selective element. The oscillator frequency is often used to keep trac ...

(IEEEstyle) File:Schaltsymbol-Keramikresonator.svg,

Ceramic resonator A ceramic resonator is an electronic component consisting of a piece of a piezoelectric ceramic material with two or more metal electrodes attached. When connected in an electronic oscillator circuit, resonant mechanical vibrations in the device ...

(3 pins)

Miscellaneous devices

File:Common Hall Sensor Symbol.png, Hall-effect sensor

Historical electronic symbols

The shape of some electronic symbols have changed over time. The following historical electronic symbols can be found in old electronic books / magazines / schematics, and now considered obsolete.

Capacitors (historical)

All of the following are obsolete capacitor symbols. File:Polarized capacitor symbol 5.png, Obsolete capacitor (very old style) File:Capacitor old.svg, Obsolete capacitor File:Capacitor old with polarity.svg, Obsolete capacitor File:Polarized capacitor symbol 3.svg, Obsolete capacitor File:Elco's.jpg, Obsolete capacitor

References

External links

{{DEFAULTSORT:Electronic Symbol Electronic engineering Pictograms