416345 2020 electrical and electronic symbols list

Electrical and electronic
symbols list
Cambridge IGCSE® and
Cambridge IGCSE® (9–1)
Design & Technology 0445, 0979
For examination from 2020.

Version 0.3

Cambridge IGCSE and Cambridge IGCSE (9–1) Design & Technology 0445, 0979 Electronic and electrical symbols list.

Primary or
secondary cell

Terminal

ac supply

Junction of
conductors

Double
junction

Crossing of
conductors with
no electrical
connection

Coil

Single pole
double throw switch

V

M

Ammeter

Voltmeter

Motor

Frame

Earth

Fuse

Switch

Break contact

Make contact
spring return

Capacitor

Potentiometer

Thermistor

Light dependent
resistor (LDR)

Polarised
capacitor

+

Together make an SPDT relay

A

Resistor

Variable
resistor

+

Semiconductor
diode

AND

Microphone

Light emitting
diode (LED)

NAND

Bell

Photodiode

OR

Buzzer

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NPN transistor

NOR

Loudspeaker

PNP transistor

Operational
amplifier

NOT (inverter)

Schmitt inverter

Lamp

Heating element