The World Of Radio Circuit Symbols

 

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Description

Unit                               Symbol

Resistors         

                             General

                            

                             

                             Variable

 

                            

                         Potentiometer 

 


Ohms

 

 

 


Capacitors

                             General

 

 

                        

                             Polarised

 

 

                           

 

                             Variable

 

farads

 

 

+

 
 

Semiconductors Diode

                                        General

 

 

       

          Light Emitting Diode (LED)

Battery

                               Single  cell

 

 

                            

 

                                   Battery

 

 

 

 

+

 

Volts

 

+

 
                                            

Inductor

                              General

 

 

 

 

                                Iron cored

 

 

 

 

henry

 

 

 

 

 

 

Transformer

 

 

 

 

 

 

 

 

 

 

 
 

 

 

Volts

A/C

 
 

Transistors

 

 

 

 

 

 

 

 

 

 

 

PNP

 

NPN

 

Crystal

 

 

 

 

 

 

hertz

 

Loudspeaker

 

 

 

 

 

 

ohms

 

Earphone

 

 

 

 

 

Microphone

 

 

 

 

 

Switch

 

 

 

 

Fuse

 

 

 

 

 

Bulb

 

 

 

 

Antenna

 

 

 

 

 

 

 

 

Earth