Basic
ANSI/IEEE
IEC
Wires Joined
Wires Not Joined
Battery
DC Supply
AC Supply
Fuse
Transformer
Ground
Resistor/Capacitors
ANSI/IEEE
ANSI/IEEE
ANSI/IEEE
ANSI/IEEE
ANSI/IEEE
ANSI/IEEE
ANSI/IEEE
IEC
IEC
IEC
IEC
IEC
IEC
IEC
Resistor
Variable Resistor
(Rheostat)
Variable Resistor
(Potentiometer)
LDR
Thermistor
Capacitor
Capacitor
(Polarised)
Diodes/Transistors
Diode
Light Emitting Diode
Zener Diode
Photodiode
Transistor NPN
Transistor PNP
Phototransistor NPN
switches
ANSI/IEEE
IEC
Push to Make
Push to Break
SPST
SPDT
DPST
Relay
DPDT
Relay
output devices
M
Lamp (indicator) Lamp (lighting) Motor
Bell
Buzzer
Inductor
Loudspeaker
logic gates
=1
&
&
>1
NOT
AND
NAND
OR
Electronic Circuit
Symbols
>1
=1
=1
NOR
EX-OR
EX-NOR
Circuit symbols are used in circuit diagrams
which show how a circuit is connected together.
Circuit symbols may differ only slightly but their
intended meanings can be very different.
There are two standards of symbols that
you may encounter, ANSI/IEEE and IEC - both
variants have been shown so that you can see
the differences.
Familiarise yourself with these symbols before
you begin to use them.
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