In embedded system design, understanding and correctly using electronic component symbols is crucial.
The symbols of electronic components serve as a “universal language” in circuit diagrams, allowing engineers to quickly understand and design complex electronic devices.
Hua Mei has compiled a quick guide on common embedded electronic component symbols for beginners, helping everyone to be more adept at designing and analyzing circuit diagrams.
Resistors are one of the most basic components in a circuit, used to limit the flow of current.
In circuit diagrams, resistors are usually represented by a simple symbol with a “Z” shape or a rectangular wavy line. The unit of resistance is ohms, often indicated next to the symbol.
Capacitors are used to store electrical energy and play a role in smoothing voltage and filtering noise in circuits.
The symbol for a capacitor consists of two parallel lines representing the capacitor’s two conductive plates, with the space in between indicating its dielectric. Depending on the type of capacitor, there may be additional markings next to the symbol, such as polarity indicators.
Transistors are semiconductor devices that control the flow of current and are widely used in amplification and switching circuits.
The symbol for a transistor varies based on its type (such as NPN, PNP) and typically includes three terminals: emitter, base, and collector. A key feature of the transistor symbol is the arrow, indicating the direction of current flow.
Diodes allow current to flow in one direction while blocking flow in the opposite direction, commonly used for rectification.
The symbol for a diode is a triangular arrow pointing to a vertical line, with the arrow indicating the direction of allowable current flow.
An integrated circuit (IC) is a collection of various electronic components (such as transistors, resistors, capacitors) designed to perform specific functions, such as amplification, timing, or data processing. In circuit diagrams, ICs are typically represented by a rectangle with multiple pins, each corresponding to different functions.
Switches are used to control the flow of current in a circuit, and their symbols are usually simple open or closed lines. Relays are electromagnetic switches, and their symbols include a coil and a set of switch contacts, representing the controlled and controlling paths.
Familiarity with these basic electronic components and their symbols is essential for any engineer involved in embedded system design.
Correct understanding and application of symbols are key to successful design. Beginners can gradually improve their skills in circuit design and analysis through continuous practice and reference to professional electronic design books and resources.
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