Circuit Symbols of Electronic Components

One of the most important thing that you need to know when you start to design a circuit project or when you want to make a printed circuit board of an existing project , is electronic circuit symbols . If you don’t know at least the main ( most used ) schematic circuit symbols it is very hard to start building a electronic project . In this article we will present the most used electronic components symbols .
Below you will find most used components circuit symbols for passive , active components and other general symbols like : wires and connections , power supplies, switches, diodes , resistors , transistors , capacitors , sensors , logic gates , etc .

Common electronic components symbols

1 Jack, coaxial or phono , 2 microphone , 3 headset , 4 double headset , 5 stereo headset , 6 speaker , 7 two-wire plug nonpolarized ,8 three-wire plug , 9 two-wire plug polarized , 10 two-wire outlet nonpolarized , 11 two-wire outlet polarized , 12 three-wire outlet ,13 signal generator source , 14 current source , 15 constant voltage source , 16 thermocouple , 17 thermocouple , 18 jumper , 19 relay , 20 solar battery , 21 battery , 22 solar cell , 23 antenna , 24 mono jack connector , 25 stereo jack connector , 26 ammeter , 27 voltmeter , 28 ohm meter , 29 fuse , 30 motor , 31 galvanometer ,  32 ground , 33 incandescent lamp , 34 neon lamp , 35 lamp , 36 amplifier , 37 inverting amplifier , 38 operational amplifier .

Transformers symbols

1 Transformer  powdered-iron core , 2 Transformer  powdered-iron core  step-down , 3 Transformer powdered-iron core step-up , 4 Transformer powdered-iron core tapped primary ,  5 Transformer powdered-iron core tapped secondary
Semiconductor symbols

1 Bipolar transistor NPN , 2 Bipolar transistor PNP , 3 Field-effect transistor  N-channel , 4 Field-effect transistor P-channel , 5 MOS field-effect transistor N-channel , 6 Triac , 7 MOS field-effect transistor P-channel , 8 Photosensitive transistor NPN , 9 Photosensitive transistor PNP , 10 Photosensitive field-effect transistor N-channel , 11 Photosensitive field-effect transistor P-channel , 12 Unijunction transistor , 13 Diac , 14 Field-effect Diode, 15 Diode  general symbol , 16 Gunn Diode , 17 Zener diode , 18 Pin Diode , 19 Schottky Diode , 20 Tunnel Diode , 21 Varactor Diode , 22 Diode general symbol , 23 Silicon-controlled rectifier , 24 Light-emitting Diode , 25 Optoisolator  .

Inductor symbols

1 Air core inductor  , 2 Bifilar air core inductor , 3 Tapped air core inductor , 4 Variable air core inductor , 5 Iron core inductor  , 2 Bifilar iron core inductor , 3 Tapped iron core inductor , 4 Variable tapped core inductor

Switches components symbols

1 Open switch , 2 single pole double throw switch , 3 push button switch ( open push switch ) , 4 closed push switch , 5 double pole double throw switch .

Logic Gates symbols


1 EXNOR  , 2 EXNORIEC, 3 EXOR , 4 EXORIEC , 5 NOT , 6 AND , 7 ANDIEC , 8 OR , 9 ORIEC , 10 NORIEC , 11 NOR ,12 NAND, 13 NANDIEC , 14 NOTIEC .