1、 Components: products that do not change the molecular composition of raw materials during processing can be called components.
Electronic components
Electronic components
Components belong to devices that do not need energy. It includes: resistance, capacitance and inductance. (also known as passive components)
Components are divided into:
1. Circuit components: diodes, resistors, etc.
2. Connecting components: connectors, sockets, connecting cables, printed circuit boards (PCBs), etc.
2、 Devices: products that change the molecular structure of raw materials during production and processing are called devices.
Devices are divided into:
1. The main characteristics of active devices are: (1) their own consumption of electric energy, (2) the need for external power supply.
2. Discrete devices are divided into (1) bipolar crystal triodes, (2) field effect transistors, (3) thyristors, (4) semiconductor resistors and capacitors.
resistance
The resistance is represented by "R" plus numbers in the circuit. For example, R1 represents the resistance numbered 1. The main functions of resistance in the circuit are: shunt, current limiting, voltage dividing, bias, etc.
capacitance
Capacitance is generally represented by "C" plus numbers in the circuit (for example, C13 represents the capacitance numbered 13). Capacitance is an element composed of two metal films close together and separated by insulating materials. The main characteristic of the capacitor is to isolate direct current AC.
The capacity of capacitance indicates the amount of electric energy that can be stored. The blocking effect of capacitance on AC signal is called capacitive reactance, which is related to the frequency and capacitance of AC signal.
inductance
Electronic components
Electronic components
Although inductors are not widely used in electronic manufacturing, they are equally important in circuits. We believe that an inductor, like a capacitor, is also an energy storage element, which can convert electrical energy into magnetic energy and store energy in the magnetic field. The inductor is represented by the symbol L. its basic unit is Henry (H), and the unit is usually millihang (MH). It often works with capacitors to form LC filters, LC oscillators, etc. In addition, people also make use of the characteristics of inductance to make choke coils, transformers, relays and so on.