Symbol | Component name | Meaning |
Wire Symbols
|
![electrical wire symbol](https://www.rapidtables.com/electric/symbols/wire.GIF) | Electrical Wire | Conductor of electrical current |
![connected wires symbol](https://www.rapidtables.com/electric/symbols/wires%20connected.GIF) | Connected Wires | Connected crossing |
![unconnected wires symbol](https://www.rapidtables.com/electric/symbols/wires%20not%20connected.GIF) | Not Connected Wires | Wires are not connected |
Switch Symbols and Relay Symbols
|
![SPST switch symbol](https://www.rapidtables.com/electric/symbols/switch.GIF) | SPST Toggle Switch | Disconnects current when open |
![SPDT switch symbol](https://www.rapidtables.com/electric/symbols/switch%20II.GIF) | SPDT Toggle Switch | Selects between two connections |
![push button symbol](https://www.rapidtables.com/electric/symbols/push%20button.GIF) | Pushbutton Switch (N.O) | Momentary switch - normally open |
![push button symbol](https://www.rapidtables.com/electric/symbols/push%20button%20II.GIF) | Pushbutton Switch (N.C) | Momentary switch - normally closed |
![dip switch symbol](https://www.rapidtables.com/electric/symbols/dip_switch.GIF) | DIP Switch | DIP switch is used for onboard configuration |
![spst relay symbol](https://www.rapidtables.com/electric/symbols/relay_spst.GIF) | SPST Relay | Relay open / close connection by an electromagnet |
![spdt relay symbol](https://www.rapidtables.com/electric/symbols/relay_spdt.GIF) | SPDT Relay |
![jumper symbol](https://www.rapidtables.com/electric/symbols/jumper.GIF) | Jumper | Close connection by jumper insertion on pins. |
![solder bridge symbol](https://www.rapidtables.com/electric/symbols/solder%20bridge.GIF) | Solder Bridge | Solder to close connection |
Ground Symbols
|
![earth ground symbol](https://www.rapidtables.com/electric/symbols/ground%20earth.GIF) | Earth Ground | Used for zero potential reference and electrical shock protection. |
![chassis symbol](https://www.rapidtables.com/electric/symbols/ground%20chassis.GIF) | Chassis Ground | Connected to the chassis of the circuit |
![common digital ground symbol](https://www.rapidtables.com/electric/symbols/ground%20digital.GIF) | Digital / Common Ground | |
Resistor Symbols
|
![resistor symbol](https://www.rapidtables.com/electric/symbols/resistor.GIF) | Resistor (IEEE) | Resistor reduces the current flow. |
![resistor symbol](https://www.rapidtables.com/electric/symbols/resistor%20II.GIF) | Resistor (IEC) |
![potentiomemer symbol](https://www.rapidtables.com/electric/symbols/potentiometer.GIF) | Potentiometer (IEEE) | Adjustable resistor - has 3 terminals. |
![potentiometer symbol](https://www.rapidtables.com/electric/symbols/potentiometer%20II.GIF) | Potentiometer (IEC) |
![variable resistor symbol](https://www.rapidtables.com/electric/symbols/variable%20resistor.GIF) | Variable Resistor / Rheostat (IEEE) | Adjustable resistor - has 2 terminals. |
![variable resistor symbol](https://www.rapidtables.com/electric/symbols/variable_resistor%20II.GIF) | Variable Resistor / Rheostat (IEC) |
![](https://www.rapidtables.com/electric/symbols/trimmer_resistor_II.gif) | Trimmer Resistor | Preset resistor |
![](https://www.rapidtables.com/electric/symbols/thermistor.gif) | Thermistor | Thermal resistor - change resistance when temperature changes |
![](https://www.rapidtables.com/electric/symbols/photoresistor.gif) | Photoresistor / Light dependent resistor (LDR) | Photo-resistor - change resistance with light intensity change |
Capacitor Symbols
|
![](https://www.rapidtables.com/electric/symbols/capacitor.GIF) | Capacitor | Capacitor is used to store electric charge. It acts as short circuit with AC and open circuit with DC. |
![capacitor symbol](https://www.rapidtables.com/electric/symbols/capacitor%20II.GIF) | Capacitor |
![polarized capacitor symbol](https://www.rapidtables.com/electric/symbols/capacitor%20polarized.GIF) | Polarized Capacitor | Electrolytic capacitor |
![polarized capacitor symbol](https://www.rapidtables.com/electric/symbols/capacitor%20polarized%20II.GIF) | Polarized Capacitor | Electrolytic capacitor |
![variable capacitor symbol](https://www.rapidtables.com/electric/symbols/variable%20capacitor.GIF) | Variable Capacitor | Adjustable capacitance |
Inductor / Coil Symbols
|
![inductor symbol](https://www.rapidtables.com/electric/symbols/inductor.GIF) | Inductor | Coil / solenoid that generates magnetic field |
![iron core inductor symbol](https://www.rapidtables.com/electric/symbols/inductor%20iron.GIF) | Iron Core Inductor | Includes iron |
![variable core inductor symbol](https://www.rapidtables.com/electric/symbols/inductor%20variable.GIF) | Variable Inductor | |
Power Supply Symbols
|
![voltage source symbol](https://www.rapidtables.com/electric/symbols/voltage%20source.GIF) | Voltage Source | Generates constant voltage |
![current source symbol](https://www.rapidtables.com/electric/symbols/current%20source.GIF) | Current Source | Generates constant current. |
![ac power source symbol](https://www.rapidtables.com/electric/symbols/AC%20source.GIF) | AC Voltage Source | AC voltage source |
![generator symbol](https://www.rapidtables.com/electric/symbols/generator.GIF) | Generator | Electrical voltage is generated by mechanical rotation of the generator |
![battery cell symbol](https://www.rapidtables.com/electric/symbols/battery%20cell.GIF) | Battery Cell | Generates constant voltage |
![battery symbol](https://www.rapidtables.com/electric/symbols/battery.GIF) | Battery | Generates constant voltage |
![controlled voltage source symbol](https://www.rapidtables.com/electric/symbols/controlled%20voltage%20source.GIF) | Controlled Voltage Source | Generates voltage as a function of voltage or current of other circuit element. |
![controlled current source symbol](https://www.rapidtables.com/electric/symbols/controlled%20current%20source.GIF) | Controlled Current Source | Generates current as a function of voltage or current of other circuit element. |
Meter Symbols
|
![voltmeter symbol](https://www.rapidtables.com/electric/symbols/voltmeter.GIF) | Voltmeter | Measures voltage. Has very high resistance. Connected in parallel. |
![ammeter symbol](https://www.rapidtables.com/electric/symbols/ammeter.GIF) | Ammeter | Measures electric current. Has near zero resistance. Connected serially. |
![ohmmeter symbol](https://www.rapidtables.com/electric/symbols/ohmmeter.GIF) | Ohmmeter | Measures resistance |
![wattmeter symbol](https://www.rapidtables.com/electric/symbols/wattmeter.GIF) | Wattmeter | Measures electric power |
Lamp / Light Bulb Symbols
|
![lamp symbol](https://www.rapidtables.com/electric/symbols/lamp.GIF) | Lamp / light bulb | Generates light when current flows through |
![lamp symbol](https://www.rapidtables.com/electric/symbols/lamp2.GIF) | Lamp / light bulb |
![lamp symbol](https://www.rapidtables.com/electric/symbols/lamp3.GIF) | Lamp / light bulb |
Diode / LED Symbols
|
![diode symbol](https://www.rapidtables.com/electric/symbols/diode.GIF) | Diode | Diode allows current flow in one direction only - left (anode) to right (cathode). |
![zener diode](https://www.rapidtables.com/electric/symbols/zener%20diode.GIF) | Zener Diode | Allows current flow in one direction, but also can flow in the reverse direction when above breakdown voltage |
![schottky diode symbol](https://www.rapidtables.com/electric/symbols/schottky%20diode.GIF) | Schottky Diode | Schottky diode is a diode with low voltage drop |
![varicap diode symbol](https://www.rapidtables.com/electric/symbols/varicap%20diode.GIF) | Varactor / Varicap Diode | Variable capacitance diode |
![tunnel diode symbol](https://www.rapidtables.com/electric/symbols/tunnel_diode.GIF) | Tunnel Diode | |
![led symbol](https://www.rapidtables.com/electric/symbols/led.GIF) | Light Emitting Diode (LED) | LED emits light when current flows through |
![photodiode symbol](https://www.rapidtables.com/electric/symbols/photodiode.GIF) | Photodiode | Photodiode allows current flow when exposed to light |
Transistor Symbols
|
![npn transistor symbol](https://www.rapidtables.com/electric/symbols/NPN%20transistor.GIF) | NPN Bipolar Transistor | Allows current flow when high potential at base (middle) |
![pnp transistor symbol](https://www.rapidtables.com/electric/symbols/PNP%20transistor.GIF) | PNP Bipolar Transistor | Allows current flow when low potential at base (middle) |
![darlington transistor symbol](https://www.rapidtables.com/electric/symbols/Darlington%20transistor.GIF) | Darlington Transistor | Made from 2 bipolar transistors. Has total gain of the product of each gain. |
![JFET-N transistor symbol](https://www.rapidtables.com/electric/symbols/JFET-N%20transistor.GIF) | JFET-N Transistor | N-channel field effect transistor |
![JFET-P transistor symbol](https://www.rapidtables.com/electric/symbols/JFET-P%20transistor.GIF) | JFET-P Transistor | P-channel field effect transistor |
![nmos transistor symbol](https://www.rapidtables.com/electric/symbols/NMOS%20transistor.GIF) | NMOS Transistor | N-channel MOSFET transistor |
![pmos transistor symbol](https://www.rapidtables.com/electric/symbols/PMOS%20transistor.GIF) | PMOS Transistor | P-channel MOSFET transistor |
Misc. Symbols
|
![motor symbol](https://www.rapidtables.com/electric/symbols/motor.GIF) | Motor | Electric motor |
![transformer symbol](https://www.rapidtables.com/electric/symbols/transformer.GIF) | Transformer | Change AC voltage from high to low or low to high. |
![](https://www.rapidtables.com/electric/symbols/electric_bell.PNG) | Electric bell | Rings when activated |
![](https://www.rapidtables.com/electric/symbols/buzzer.PNG) | Buzzer | Produce buzzing sound |
![fuse symbol](https://www.rapidtables.com/electric/symbols/fuse.GIF) | Fuse | The fuse disconnects when current above threshold. Used to protect circuit from high currents. |
![fuse symbol](https://www.rapidtables.com/electric/symbols/fuse%20II.GIF) | Fuse |
![bus symbol](https://www.rapidtables.com/electric/symbols/bus.GIF) | Bus | Contains several wires. Usually for data / address. |
![bus symbol](https://www.rapidtables.com/electric/symbols/bus%20II.GIF) | Bus |
![bus symbol](https://www.rapidtables.com/electric/symbols/bus%20III.GIF) | Bus |
![optocoupler symbol](https://www.rapidtables.com/electric/symbols/optocoupler.GIF) | Optocoupler / Opto-isolator | Optocoupler isolates connection to other board |
![speaker symbol](https://www.rapidtables.com/electric/symbols/speaker.GIF) | Loudspeaker | Converts electrical signal to sound waves |
![microphone symbol](https://www.rapidtables.com/electric/symbols/microphone.GIF) | Microphone | Converts sound waves to electrical signal |
![operational amplifier symbol](https://www.rapidtables.com/electric/symbols/operational%20amplifier.GIF) | Operational Amplifier | Amplify input signal |
![schmitt trigger symbol](https://www.rapidtables.com/electric/symbols/schmitt%20trigger.GIF) | Schmitt Trigger | Operates with hysteresis to reduce noise. |
![](https://www.rapidtables.com/electric/symbols/adc.GIF) | Analog-to-digital converter (ADC) | Converts analog signal to digital numbers |
![](https://www.rapidtables.com/electric/symbols/dac.GIF) | Digital-to-Analog converter (DAC) | Converts digital numbers to analog signal |
![crystal oscillator symbol](https://www.rapidtables.com/electric/symbols/oscillator%20crystal.GIF) | Crystal Oscillator | Used to generate precise frequency clock signal |
Antenna Symbols
|
![antenna symbol](https://www.rapidtables.com/electric/symbols/antenna.GIF) | Antenna / aerial | Transmits & receives radio waves |
![antenna symbol](https://www.rapidtables.com/electric/symbols/antenna%20III.GIF) | Antenna / aerial |
![dipole antenna symbol](https://www.rapidtables.com/electric/symbols/antenna%20II.GIF) | Dipole Antenna | Two wires simple antenna |
Logic Gates Symbols
|
![NOT gate symbol](https://www.rapidtables.com/electric/symbols/NOT%20gate.GIF) | NOT Gate (Inverter) | Outputs 1 when input is 0 |
![AND gate symbol](https://www.rapidtables.com/electric/symbols/AND%20gate.GIF) | AND Gate | Outputs 1 when both inputs are 1. |
![NAND gate symbol](https://www.rapidtables.com/electric/symbols/NAND%20gate.GIF) | NAND Gate | Outputs 0 when both inputs are 1. (NOT + AND) |
![OR gate symbol](https://www.rapidtables.com/electric/symbols/OR%20gate.GIF) | OR Gate | Outputs 1 when any input is 1. |
![NOR gate symbol](https://www.rapidtables.com/electric/symbols/NOR%20gate.GIF) | NOR Gate | Outputs 0 when any input is 1. (NOT + OR) |
![XOR gate symbol](https://www.rapidtables.com/electric/symbols/XOR%20gate.GIF) | XOR Gate | Outputs 1 when inputs are different. (Exclusive OR) |
![D flip flop symbol](https://www.rapidtables.com/electric/symbols/D%20flip-flop.GIF) | D Flip-Flop | Stores one bit of data |
![mux symbol](https://www.rapidtables.com/electric/symbols/mux%20II.GIF) | Multiplexer / Mux 2 to 1 | Connects the output to selected input line. |
![mux symbol](https://www.rapidtables.com/electric/symbols/mux.GIF) | Multiplexer / Mux 4 to 1 |
![demux symbol](https://www.rapidtables.com/electric/symbols/demux.GIF) | Demultiplexer / Demux 1 to 4 | Connects selected output to the input line. |
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