Electronic Components Symbols

ANTENNA

Is a device (wire, rod, satellite dish, etc.) designed to intercept or transmit radio waves and transform the electromagnetic fields received in electrical si, etc.ls or vice versa. 

BATTERY

The battery symbol looks like a pair of disproportionate parallel lines, while more line pairs usually indicate more row cells in the battery. 

CAPACITOR

In the schematic, several types of capacitor symbols are available depending on their polarity and functionality.

DIODE

The symbol of a diode looks like a horizontal isosceles triangle pressed up against a line between two terminals.  In a diode, one terminal is positive (anode) and another one is negative (cathode). The closed side of a triangle is the cathode, and the base of a triangle is an anode. 

It is important to note that the positive terminal (anode) of the diode is connected to the positive pole of the battery and negative pole (cathode) of the diode is connected to the negative terminal of the battery. 

ELECTRO ACOUSTIC DEVICES

These are symbols of electronic input or output devices such like; Loudspeaker, Buzzer, Microphone and etc.

FUSE

A fuse is an electrical/electronics safety device that provides overcurrent protection for a circuit. Sometimes called as a sacrificial device in order protect further damage in the circuit.

GROUND

Schematic ground symbols typically include one to three flat lines or sometimes down-pointing arrows or triangle.

INDUCTOR

Inductor’s Symbol contains loopy coils or curved bumps in between two terminals. 

LOGIC GATES

Logic gates are the fundamental building blocks of any digital system. Logic gates have two inputs and one output however, the number of inputs can be changed as per the requirement while the output should be the same. 

MEASURING INSTRUMENTS

These are electronic equipment's used to measure circuit parameters like; voltage, current, resistance and etc.

RELAY

Relay is an electromagnetic switch that can be turned on with small electrical current which further allows a large amount of current to flow from it. It usually pairs a coil with a switch which can be seen in the symbol itself. The relay has 5 pins consisting of a pair of coil pins, a common pin, a normally open pin (NO), and a normally closed pin (NC).

RESISTOR

Symbol of the resistor is represented by Zig-Zag lines between two terminals. It is a common and widely used symbol in schematics. It can also be represented by another symbol that has an unfilled rectangle between two terminals instead of Zig-Zag lines. 

VOLTAGE & CURRENT SOURCES

Generally, constant voltage sources are used while working with electronics. We can use one of these two symbols to define if the source supplies Direct Current (DC) or Alternating Current (AC). 

SWITCHES

Switches are electronic devices designed to interrupt or divert the flow of electric current or signals in a circuit. The simplest switch, a single-throw switch (SPST), consists of two terminals with a semi-connected lead representing the actuator. 

TRACES

These are symbols used for illustrating wire connection/s in a diagram.

TRANSFORMER

A transformer is a static device that transmits electrical energy from one circuit to another through electromagnetic induction. The transformer symbol is denoted by two coils placed side by side, and separated by parallel lines. They are generally used to step up or step down the voltage levels. 

TRANSISTOR

In schematics, various transistors are available, either BJTs or MOSFETs. The transistor is a three-terminal device that amplifies or switches electronic signals and electrical power.