Electrical and electronic wiring symbols

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Description and Tags

Electrical Engineering

GRE Physics

Specialized Topics

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92 Terms

1
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Wire

Conductor of electrical current

<p>Conductor of electrical current</p>
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Connected wires

<p></p>
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Not connected wires

<p></p>
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SPST switch

Disconnects current when open

<p>Disconnects current when open</p>
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SPDT switch

Selects between two connections

<p>Selects between two connections</p>
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Pushbutton Switch (N.O)

Momentary switch - normally closed

<p>Momentary switch - normally closed</p>
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Pushbutton switch (N.C)

Momentary switch - normally closed

<p>Momentary switch - normally closed</p>
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DIP switch

is used for onboard configuration

<p>is used for onboard configuration</p>
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SPST relay

Relay open / close connection by an electromagnet

<p>Relay open / close connection by an electromagnet</p>
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SPDT relay

Relay open / close connection by an electromagnet

<p>Relay open / close connection by an electromagnet</p>
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Jumper

Close connection by jumper insertion on pins

<p>Close connection by jumper insertion on pins</p>
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Solder bridge

Solder to close connection

<p>Solder to close connection</p>
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Earth ground

Used for zero potential reference and electrical shock protection

<p>Used for zero potential reference and electrical shock protection</p>
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Chassis Ground

Connected to the chassis of the circuit

<p>Connected to the chassis of the circuit</p>
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Digital / Common Ground

<p></p>
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Resistor

Reduces the current flow - IEEE

<p>Reduces the current flow - IEEE</p>
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Resistor

IEC

<p>IEC</p>
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Potentiometer

Adjustable resistor - has 3 terminals. IEEE

<p>Adjustable resistor - has 3 terminals. IEEE</p>
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Potentiometer

Adjustable resistor - has 3 terminals. IEC

<p>Adjustable resistor - has 3 terminals. IEC</p>
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Variable resistor / Rheostat

Adjustable resistor - has 2 terminals. IEEE

<p>Adjustable resistor - has 2 terminals. IEEE</p>
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Variable resistor / Rheostat

Adjustable resistor - has 2 terminals. IEC

<p>Adjustable resistor - has 2 terminals. IEC</p>
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Trimmer resistor

Preset resistor

<p>Preset resistor</p>
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Thermistor

Thermal resistor - change resistance when temperature changes

<p>Thermal resistor - change resistance when temperature changes</p>
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Photoresistor / light dependent resistor (LDR)

Change resistance with light intensity

<p>Change resistance with light intensity</p>
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Capacitor

Used to store electric charge. Acts as short circuit with AC and open circuit with DC

<p>Used to store electric charge. Acts as short circuit with AC and open circuit with DC</p>
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Capacitor

Used to store electric charge. Acts as short circuit with AC and open circuit with DC

<p>Used to store electric charge. Acts as short circuit with AC and open circuit with DC</p>
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Polarized capacitor

electrolytic capacitor

<p>electrolytic capacitor</p>
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Polarized capacitor

Electrolytic capacitor

<p>Electrolytic capacitor</p>
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Variable capacitor

Adjustable capacitance

<p>Adjustable capacitance</p>
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Inductor

Coil / solenoid that generates magnetic field

<p>Coil / solenoid that generates magnetic field</p>
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Iron core inductor

Includes iron

<p>Includes iron</p>
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Variable inductor

<p></p>
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Voltage source

Generate constant voltage

<p>Generate constant voltage</p>
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Current source

Generates constant current

<p>Generates constant current</p>
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AC voltage source

<p></p>
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Generator

Electrical voltage is generated by mechanical rotation of the generator

<p>Electrical voltage is generated by mechanical rotation of the generator</p>
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Battery cell

Generates constant voltage

<p>Generates constant voltage</p>
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Battery

Generates constant voltage

<p>Generates constant voltage</p>
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Controlled voltage source

Generates voltage as a function of voltage or current of other circuit element.

<p>Generates voltage as a function of voltage or current of other circuit element.</p>
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Controlled current source

Generates current as a function of voltage or current of other circuit element

<p>Generates current as a function of voltage or current of other circuit element</p>
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Voltmeter

Measures voltage. Has very high resistance. Connected in parallel

<p>Measures voltage. Has very high resistance. Connected in parallel</p>
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Ammeter

Measures current. Has near zero resistance. Connected serially

<p>Measures current. Has near zero resistance. Connected serially</p>
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Ohmmeter

Measures resistance

<p>Measures resistance</p>
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Wattmeter

Measures electric power

<p>Measures electric power</p>
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Lamp / light bulb

Generates light when current flows through

<p>Generates light when current flows through</p>
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Lamp / light bulb

Generates light when current flows through

<p>Generates light when current flows through</p>
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Lamp / light bulb

Generates light when current flows through

<p>Generates light when current flows through</p>
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Diode

Allow current flow in on direction only - left (anode) to right (cathode)

<p>Allow current flow in on direction only - left (anode) to right (cathode)</p>
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Zener diode

Allows current flow in one direction, but also can flow in the reverse direction when above breakdown voltage

<p>Allows current flow in one direction, but also can flow in the reverse direction when above breakdown voltage</p>
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Schottky diode

Is a diode with low voltage drop

<p>Is a diode with low voltage drop</p>
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Varactor / varicap diode

Variable capacitance diode

<p>Variable capacitance diode</p>
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Tunnel diode

<p></p>
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Light emitting diode

Emits light when current flows though

<p>Emits light when current flows though</p>
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Photodiode

Photodiode allows current flow when exposed to light

<p>Photodiode allows current flow when exposed to light</p>
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NPN Bipolar transistor

Allows current flow when low potential at base (middle)

<p>Allows current flow when low potential at base (middle)</p>
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PNP Bipolar transistor

Allows current flow when low potential at base (middle)

<p>Allows current flow when low potential at base (middle)</p>
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Darlington transistor

Made from 2 bipolar transistors. Has total gain of the product of each gain.

<p>Made from 2 bipolar transistors. Has total gain of the product of each gain.</p>
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JFET-N transistor

N-channel field effect transistor

<p>N-channel field effect transistor</p>
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JFET-P transistor

P-channel field effect transistor

<p>P-channel field effect transistor</p>
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NMOS transistor

N-channel MOSFET transistor

<p>N-channel MOSFET transistor</p>
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PMOS transistor

P-channel MOSFET transistor

<p>P-channel MOSFET transistor</p>
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Motor

Electric motor

<p>Electric motor</p>
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Transformer

Change AC voltage from high to low or vice versa

<p>Change AC voltage from high to low or vice versa</p>
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Electric bell

Rings when activated

<p>Rings when activated</p>
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Buzzer

Produces buzzing sound

<p>Produces buzzing sound</p>
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Fuse

Disconnects when current above threshold. Used to protect circuit from high currents

<p><s>Disconnects when current above threshold. Used to protect circuit from high currents</s></p>
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Fuse

Disconnects when current above threshold. Used to protect circuit from high currents

<p>Disconnects when current above threshold. Used to protect circuit from high currents</p>
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Bus

Contains several wires. Usually for data address

<p><s>Contains several wires. Usually for data address</s></p>
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Bus

Contains several wires. Usually for data address

<p>Contains several wires. Usually for data address</p>
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Bus

Contains several wires. Usually for data address

<p>Contains several wires. Usually for data address</p>
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Optocoupler / opto-isolator

Isolates connection to other board

<p>Isolates connection to other board</p>
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Loudspeaker

Converts electrical signal to sound waves

<p>Converts electrical signal to sound waves</p>
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Microphone

Converts sound waves to electrical signal

<p>Converts sound waves to electrical signal</p>
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Operational amplifier

Amplify input signal

<p>Amplify input signal</p>
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Schmitt trigger

Operates with hysteresis to reduce noise

<p>Operates with hysteresis to reduce noise</p>
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Analog to digital converter (ADC)

Converts analog signal to digital numbers

<p>Converts analog signal to digital numbers</p>
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Digital to analog converter (DAC)

Converts digital numbers to analog signal

<p>Converts digital numbers to analog signal</p>
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Crystal oscillator

Used to generate precise frequency clock signal

<p>Used to generate precise frequency clock signal</p>
79
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Antenna

Transmits and receives radio waves

<p>Transmits and receives radio waves</p>
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Antenna

Transmits and receives radio waves

<p>Transmits and receives radio waves</p>
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Dipole antenna

Two wires simple antenna

<p>Two wires simple antenna</p>
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Not gate (inverter)

Outputs 1 when input is 0

<p>Outputs 1 when input is 0</p>
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And gate

Output 1 when both inputs are 1

<p>Output 1 when both inputs are 1</p>
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NAND gate

Outputs 0 when both inputs are 1 (not + and )

<p>Outputs 0 when both inputs are 1 (not + and )</p>
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Or gate

Output 1 when any input is 1

<p>Output 1 when any input is 1</p>
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Nor gate

Output 0 when any input is 1. (Not + or)

<p>Output 0 when any input is 1. (Not + or)</p>
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XOR gate

Output 1 when inputs are different (exclusive or)

<p>Output 1 when inputs are different (exclusive or)</p>
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D flip-flop

Stores one bit of data

<p>Stores one bit of data</p>
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Multiplexer / mux 2 to 1

Connects the output to selected input line

<p>Connects the output to selected input line</p>
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Multiplexer / mux 4 to 1

Connects the output to selected input line

<p>Connects the output to selected input line</p>
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Demultiplexer / demux 1 to 4

Connects selected output to the input line

<p>Connects selected output to the input line</p>
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