Electronic symbols

Resistor

Resistor used to control flow of current in circuit.In case the value of resistor is small then current flow will be high, if resistor value is high then it reduces current flow.To drop voltage in circuit we need resistor, here it act as a voltage divider.

Resistor General
Resistor Europe
Variable Resistor
Variable Resistor Europe

Tapped
Kelvin
Thermistor
Photoconductive Cell

Capacitor

Capacitor used to store energy in the form of electrostatic field.It charges & discharges quickly based on the value of capacitor.We require capacitor to filter out the noises etc..,

Non Polarized Variant 1
Non Polarized Variant 2
Polarized
Variable Capacitor
Capacitor Non Polarized Euro 1
Capacitor Non Polarized Euro 2
Capacitor Non Polarized Euro 3
Capacitor Polarized Euro 1
Capacitor Polarized Euro 2
Capacitor Trim Euro 1
Capacitor Trim Euro 2
Capacitor Trim Euro 3
Capacitor Var Euro 1
Capacitor Var Euro 2
Capacitor Var Euro 3
Capacitor Variable Split Stator
Capacitor Feed Through 1
Capacitor Feed Through 2
Capacitor Feed Through 3

Inductor

Inductor which tries to prevent the current flowing through it from changing. Inductor creates magnetic field when current flows through it and magnetic field do not like to change.To avoid damages in electrical circuit inductors are widely used.

Air Core
Iron Core
Air Core Center Tap
Variable Inductor
Iron Core Center Tap

Diode

Diode act as a valve in electronic & electrical circuit.It allows current in only one direction (i.e ideally short circuit) and blocks in opposite direction (i.e ideally open circuit).Diode starts conduct when the applied voltage is greater than threshold voltage (vth).For silicon vth-0.7v,germanium vth-0.3v.

PN Diode-P-type and N type semiconductor is combined together to form PN diode and here doping level is low.PN diode operates Only when it is connected to forward biased voltage.If pn diode operates in reverse bias at certain voltage diode gets damaged.The PN diode widely used in rectifiers,detectors,clippers,clampers etc.,
Zener diode – zener diode also made up of pn material but here doping level is high.zener operates at both forward bias as well as reverse bias region.It is also known as voltage regulator because it controls the voltage and protects the load.

Diode General
Schottky
Zener
Zener Variant 1
Zener Adjustable
Varactor Variant 1
Varactor Variant 2
Varactor Variant 3
Shockley
Scr Thyristor Var 1
Scr Thyristor Var 2
Triac Variant 1
Triac Variant 2
Transistor Programmable Unijunction
Tunnel Variant 1
Tunnel Variant 2
Diac
Diode Constant Current
Diode Bridge
Diode Bridge Schottky

MOSFET

MOSFET is a another category of FET but it has four terminals gate, source,drain & substrate here gate of the MOSFET is insulated from the channel by silicon dioxide layer.Two types of MOSFET are enchancement & depletion MOSFET has high input impedance & low output impedance & it is mainly used in low power circuits,chip design technology.
E-MOSFET – In enhancement MOSFET there will not be any channel between source and drain untill gate voltage is applied.If the applied gate voltage is above threshold value channel is created between source and drain.The conductivity of the channel starts by increasing gate to source voltage.
 D-MOSFET – In depletion MOSFET there will be inbuilt channel between drain & source adjacent to the insulated gate.The D-MOSFET can be operated at two modes depletion mode or enhancement mode.Since gate is insulated either positive or negative gate voltage can be applied.

Depletion mode-  If n-channel mosfet operates in depletion mode, negative gate to source voltage is applied so conduction electrons repels in channel & leave positive ions in their position due to this n channel depleted of some of its electrons,thus decreasing channel conductivity.If more negative gate voltage is applied there will not be conductivity in channel.If gate voltage is zero then conduction occurs between drain to source.
Enhancement mode- If n-channel mosfet operates in enhancement mode, positive gate to source voltage is applied then more conduction electron are attracted into the channel,thus increasing the channel conductivity.But depletion mode is more preferable than enhancement mode.

N Channel Enh
P Channel Enh
N Channel Dep
P Channel Dep

BJT

The term bipolar means current conduction happens because of both holes and electrons.It is a current controlled device & amplifies the flow of electric current.BJT has three terminals base,emitter & collector.Base is lightly doped,emitter is heavily doped & collector is moderately doped.Two types of BJT are NPN & PNP transistor.

NPN Transistor- The transistor operated in three modes cutoff, saturation & active mode.In cutoff mode both emitter to base & collector base junction are reverse biased,so no current flows it acts like an open switch.In saturation mode both emitter to base & collector base junction are forward biased,so huge current flows it acts like an closed switch.In active mode emitter to base is forward biased & collector base junction is reverse biased,so amplification of currently takes place here.
PNP Transistor- The operation of PNP is same as NPN transistor.The major difference is charge carriers, in PNP holes carry most of the current but switching time is slower.

NPN
PNP

Darlington

NPN
PNP
NPN Damper Diode
PNP Damper Diode

JFET

JFET is a type of FET that operates at reverse biased Junction to control current in the channel.In JFET conduction occurs when gate to source is set to reverse bias voltage & external voltage is applied between drain to source that supplies current from drain to source.If we increase gate voltage then depletion region formed inside channel & it increase channel resistance therefore drain current will be reduced.Two types of JFET are n-channel JFET,p-channel JFET.In n-channel current conduction happens due to electrons & p-channel holes carry electric current.

JFET N Channel
JFET P Channel

Amplifier

General
Opamp Single Supply
Opamp Dual Supply
Instrumentation Amplifier

Transformers

Step Up
Step Down
Single Tap Primary – Center Tap Secondary
Single Tap Primary – Double Tap Secondary
Center Tap Primary – Single Tap Secondaary
Double Tap Primary – Double Tap Secondary

Chokes

Mutual Inductor Air Core
Mutual Inductor Iron Core
Mutual Inductor Variable Air Core
Mutual Inductor Variable Iron Core
Mutual Inductor Air Core Phased
Mutual Inductor Iron Core Phased

Buffer

Buffer Non Inverting Enable
Inverter Enable
Inverter Demorgan Enable

Flip Flop

D flip flop Non Inverting Output
D flip flop Inverting Output
D flip flop Non Inverting Tri State Output
D Latch
JK flip flop Inverting Reset
JK flip flop Reset
T flip flop
SR Latch
SR Latch Gated

Gate

AND
OR
NAND
NOR
EXOR
EXNOR
INVERTER

Port

Gnd Earth
Gnd Chassis
Gnd General
Source +3.3v
Source +5v
Source +12v
Source Vcc
Source Vdd
Source Vss

Switch

SPST
SPDT
Normally Open
Normally Closed
DPST
DPDT
Rotary 3 Position
Rotary 5 Position
Slide Dip 1
Slide Dip 2
Slid Dip 3
Slide Dip 4

Source

Ameter
Voltmeter
Voltage Source AC
Voltage Source Signal
Voltage Source Multi
Current Source
Battery Holder Cell
Battery Holder Single

Analog To Digital Converter

Serial ADC SPI
Serial ADC I2C
Parallel ADC 12Bit
Parallel ADC 14Bit
Parallel ADC 16Bit
Serial ADC SPI Differential
Serial ADC I2C Differential
Parallel ADC 12Bit Differential
Parallel ADC 14Bit Differential
Parallel ADC 16Bit Differential

Digital To Analog Converter

Serial DAC SPI
Serial DAC I2C
Parallel DAC 12Bit
Parallel DAC 14Bit
Parallel DAC 16Bit

Opto Electronics

Led
Lamp Incandescent
Lamp Neon
Phototransistor
Photodarlington
NPN Phototransistor

Sensor

Thermocouple
Thermopile
Rotary Encoder
Rotary Encoder 4 wire
Rotary Encoder Quadrature
Rotary Encoder 7 wire

Motor

DC Motor
Stepper Motor 4 wire
Stepper Motor 6 wire

RJ Cable

RJ45 8-8, TAP Up
RJ45 8-8, TAP Down
RJ11 4-4, TAP Down
RJ12 6-6, TAP Up
RJ12 6-6, TAP Down

RF

Circulator
Mixer
Key
Directional Coupler Reverse
Directional Coupler Forward Reverse

Antennas

Antenna Variant 1
Stripline Antenna
Stripline Antenna 1
Antenna
Antenna Balanced
Antenna Yagi
Antenna Loop Unsheilded

Filter

Filter Frequency Dependent Attenuator
Filter Variable RF Attenuator
Filter RF Attenuator
Filter High Pass
Filter Low Pass

Electromechanical Audio

Speaker
Microphone

Relay

SPST Polarized
SPST NC Polarized
SPDT Polarized
DPST Polarized
DPST NC Polarized
DPDT Polarized

Fuse

Fuse VAR 1
Fuse VAR 2
Fuse Holder

Circuit Breaker

Oil Circuit Breaker
Oil Circuit Breaker Removable
Air Circuit Breaker Drawout
Air Circuit Breaker Non Drawout