Electronic components Parts are the basic elements in electronic circuits, usually individual packages, and have two or more leads or metal contacts. Electronic components must be connected to each other to form an electronic circuit with specific functions, such as amplifiers, radio receivers, oscillators, etc. One of the common ways to connect electronic components is soldering to printed circuit boards. Electronic components may be individual packages (resistors, capacitors, inductors, transistors, diodes, etc.), or groups of various complexity, such as integrated circuits (operational amplifiers, exclusions, logic gates, etc.).
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Component classification In order to maintain the stability of the operation of electronic components, they are usually covered and packaged with synthetic resin (Resin dispensing) to improve insulation and protection from environmental influences. [1] Components may be passive or active: Passive components are electronic components that do not have any gain or directionality when in use. In network analysis, they are called electrical elements. Active components are a kind of electronic components. Compared with passive components, they have gain or directionality when in use. They include semiconductor devices and vacuum tubes.
Terminals and connectors Device for circuit connection Terminal Connector (Closed) Signal socket (Socket) Terminal Blocks (Screw terminal, Terminal Blocks) Signal connector (Header) wire Wires with connectors or terminals at the end Power cord Patch cord Oscilloscope probe (Test lead) switch Electronic components that can control the open or closed circuit of the circuit Switch-manually operated switch Keypad- a group of button switches (such as a small keyboard that can only enter numbers) Relay-A current operated switch. It is an electromagnetic component, which is different from a solid state relay (Solid State Relay). Electromagnetic switch Thermostat-temperature-actuated switch Circuit Break-a switch actuated by overcurrent Limit Switch-Mechanical start switch Mercury Switch Centrifugal Switch resistance Resistive electronic components See the resistance in the "Sensor" paragraph below for environmental detection See the resistance in the "protective device" paragraph below, used to limit current or voltage Resistor-fixed resistance value Resistor Network Trimmer-small variable resistor Variable resistance-variable resistance value Heater-Heating Element Resistance Wire-A wire made of high-resistance material, similar to a heating element Thermistor-temperature changes resistance value Varistor-Varistor protective device Protect the passive components of the circuit from excessive voltage or current Although these components are technically electric wires, resistors, or vacuum tubes, they are listed below according to their purpose. Active components belong to the execution protection function in the semiconductor category, as follows. Fuse-over current protection, can only be used once. Self-resetting fuse (PolySwitch, self-resetting fuse)-over current protection, can be used repeatedly after reset Metal oxide varistors, surge absorbers (MOV)-overvoltage protection, these are passive components, unlike TVS Inrush current limiter (Inrush current limiter)-to avoid damage caused by inrush current
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