Symbol Component name
Electrical Wire
Connected Wires
Not Connected Wires
SPST Toggle Switch
SPDT Toggle Switch
Pushbutton Switch (N.O)
Pushbutton Switch (N.C)
DIP Switch
SPST Relay
SPDT Relay
Jumper
Solder Bridge
Earth Ground
Chassis Ground
Digital / Common Ground
Resistor (IEEE)
Resistor (IEC)
Potentiometer (IEEE)
Potentiometer (IEC)
Variable Resistor / Rheostat (IEEE)
Variable Resistor / Rheostat (IEC)
Trimmer Resistor
Thermistor
Photoresistor / Light dependent resistor (LDR)
Capacitor
Polarized Capacitor
Variable Capacitor
Inductor
Iron Core Inductor
Variable Inductor
Voltage Source
Current Source
AC Voltage Source
Generator
Battery Cell
Battery
Controlled Voltage Source
Controlled Current Source
Voltmeter
Ammeter
Ohmmeter
Wattmeter
Lamp / light bulb
Diode
Zener Diode
Schottky Diode
Varactor / Varicap Diode
Tunnel Diode
Light Emitting Diode (LED)
Photodiode
NPN Bipolar Transistor
PNP Bipolar Transistor
Darlington Transistor
JFET-N Transistor
JFET-P Transistor
MOSFET-N Transistor
MOSFET-P Transistor
Motor
Transformer
Fuse
Optocoupler / Opto-isolator
Loudspeaker
Microphone
Operational Amplifier
Schmitt Trigger
Microphone
Digital-to-Analog converter (DAC)
Crystal Oscillator
Antenna / aerial
Dipole Antenna