Schematic Symbol Reference

Symbols used to represent electrical devices and electronic functions.

Last on my list of electronics items to begin learning was schematics; how to read them and how to create schematic drawings. This page is actually an exercise for me to practice drawing schematic symbols. I have drawn each of these using Adobe Illustrator. I hope to add more symbols as time passes.  Below is the schematic symbols reference.

SOURCES

DC Sources


Vcc


Single Cell Battery


Multicell Battery


AC Source


Photocell


GROUNDS

Earth


Chassis


Gnd


RESISTORS

Resistor


Variable Resistor


Tapped Resistor


Adjustable Resistor


Photo Resistor


Thermistor


Varistor


Photo Resistor


DIODES

Rectifier Diode


Schottky Diode


Zener Diode


Tunnel Diode


Photo Diode


LED


Varactor


DIAC


SWITCHES

SPST


SPDT


DPST


DPDT


Time Controlled Switch


Voltage Controlled Switch


Momentary-Normally Open


Momentary-Normally Closed


Thermal-Normally Open


Thermal-Normally Closed


Tilt Switch


CAPACITORS

Fixed Capacitor


Non-Polarized Capacitor


Electrolyic Capacitor


Variable Capacitor


Split-Stator Capacitor


Feed-Through Capacitor


TRANSISTORS

Bipolar PNP Transistor


Bipolar NPN Transistor


P-Channel UJT Transistor


N-Channel UJT Transistor


P-Channel Junction FET Transistor


N-Channel Junction FET Transistor


P-Channel Depletion Mode MOSFET


N-Channel Depletion Mode MOSFET


P-Channel Enhancement Mode

MOSFET Transistor


N-Channel Enhancement Mode

MOSFET Transistor


P-Channel Insulated Gate

Transistor


N-Channel Insulated Gate

Transistor


P-Channel Power

MOSFET Transistor


N-Channel Power

MOSFET Transistor


Basic Schematic Symbols