
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

RGB 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