Electronic Symbols

This page shows some of the basic electronic circuit symbols that are used in some of our circuit diagrams. There are many more that we do not use so this is not an exhaustive list.

Electronic Symbols

Wire Symbols
Symbol	Component name	Symbol	Component name
	Electrical Wire		Wires crossing but not joined
	Wire junction		Multiple wire junction
	Multiple wire junction		Test Point
	Terminal		Chassis Ground
	Earth Ground
Power Supply Symbols
Symbol	Component name	Symbol	Component name
	DC Voltage Source		Current Source
	AC Voltage Source		Single Cell Battery
	Multiple Cell Battery		Controlled Voltage Source
	Controlled Current Source		Fuse
	Fuse		Transformer
Switch and Relay Symbols
Symbol	Component name	Symbol	Component name
	SPST Toggle Switch		SPDT Toggle Switch
	Switch SPST normally closed		Switch SPST normally open
	Switch DPST normally closed		Switch DPST normally open
	DIP Switch		SPST Relay
	SPDT Relay		Jumper
	Solder Bridge
Lamp / Light Bulb Symbols
Symbol	Component name	Symbol	Component name
	Lamp / light bulb		Lamp / light bulb
	Lamp / light bulb
Diode / LED Symbols
Symbol	Component name	Symbol	Component name
	Diode		Zener Diode
	Schottky Diode		Varactor / Varicap Diode
	Tunnel Diode		Light Emitting Diode (LED)
	Photodiode
Resistor Symbols
Symbol	Component name	Symbol	Component name
	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 Symbols
Symbol	Component name	Symbol	Component name
	Capacitor		Capacitor
	Polarized Capacitor		Polarized Capacitor
	Variable Capacitor
Meter Symbols
Symbol	Component name	Symbol	Component name
	Voltmeter		Ammeter
	Ohmmeter		Wattmeter
Misc. Symbols
Symbol	Component name	Symbol	Component name
	Motor