Manual SMD proofing electronic components are electronic components and small motors, instruments and meters. They are often composed of multiple parts and can be used in similar products. They often refer to industrial parts such as electrical appliances, radios, and instruments, such as capacitors, transistors, etc. Sub-devices such as wires and clockwork.
Ordinary diodes, etc.
First of all, components: the factory does not change the molecular composition of the raw materials and products during the processing process, which can be called components. Components do not require equipment for energy.
It includes: resistance, capacitance, and inductance.
The components are divided into:
1. Circuit components: diodes, resistors, etc.
2. Connecting parts: connectors, sockets, connecting cables, printed circuit boards (PCB)
The second is the device: the raw material product that has changed the molecular structure of the manual patch proofing factory during the production process is called the device
These devices are divided into:
1. The main features of active devices are: (1) It consumes electric energy by itself (2) It needs an external power supply.
2. Discrete devices are divided into (1) bipolar transistor (2) field effect transistor (3) thyristor (4) semiconductor resistor capacitor
The resistance in the circuit is represented by the number "r", for example: r1 represents the resistance numbered 1. The main functions of resistors in the circuit are: shunting, current limiting, voltage distribution, bias and so on.
The capacitor in the circuit is usually represented by "c" plus a number (for example, c13 represents the number 13 on the edge of the capacitor number). A capacitor is a component that is closely connected by two metal films and separated by an insulating material. The characteristics of capacitors are mainly adapted through cycling.
The capacity of a capacitor indicates the amount of energy that can be stored. The resistance of the capacitor to the AC signal is called the tolerance resistance, which is related to the frequency and capacity of the AC signal.
In the circuit, the crystal diode is usually represented by "d" plus a number, such as d5, which is numbered 5.
Function: The main characteristic of the diode is unidirectional conduction, that is, under the action of forward voltage, the on-resistance is very small, and under the action of reverse voltage, the on-resistance is very large or infinite.
Because of these characteristics of diodes, cordless phones often use them in rectifiers, isolation, regulation, polarity protection, code control, FM modulation, and noise suppression circuits.
Inductors Inductors are not widely used in electronic products, but they are equally important in circuits. We believe that inductors, like capacitors, are energy storage elements that convert electrical energy into magnetic field energy and store energy in the magnetic field. The inductor is represented by the symbol L, which is basically Henry (H) and is often used in millivolts (MH). It usually works with capacitors to form LC filters, LC oscillators and so on.
In addition, people also use the characteristics of inductors to make choke loops, transformers, relays, and so on.