Entering the electronic design industry, you need to know which electronic components applications

Resistance: Resistive electronic components are used in circuit applications. There are mainly voltage divider, current limit, and capacitor to form an RC filter. In the AD acquisition circuit, it can be used as a sampling resistor.

Capacitor: A capacitor is an energy storage component. The 2 capacitors next to the crystal oscillator are load capacitors. In circuit design, the most important function is to play a filtering role. In the design of the power circuit, there will be two kinds of capacitors at the input and output ports, generally a large capacitor plus a small capacitor. The principle is that capacitors can pass alternating current and block direct current.

Inductance: Its characteristics are opposite to capacitance, and it is DC and AC resistance. Inductors are used more frequently in filter circuits.
Diode: A unidirectional device. The forward direction is through and the reverse direction is over. The diode plays the role of anti-reverse connection in the design of the power circuit, preventing the positive and negative poles of the power supply from being reversed. For rectification, four diodes form a rectifier circuit, which turns the AC signal into a DC signal. Limiting effect, when the diode is turned on, the forward voltage drop is only a voltage of a few V, which can limit the voltage of a certain signal to a certain value.