PCB can use a variety of components, the following are some common types and examples of related models:

Resistors: such as chip resistors 0805, 1206, etc.; common models such as 0603R1002F, 0805R2203F, etc., which are used to limit the current and reduce the voltage;

Capacitors: such as ceramic capacitors, electrolytic capacitors, etc.; common models such as 0603CG102J500NT, 10uF/16V electrolytic capacitors, etc., can be used for charge storage, filtering, coupling, etc.;

Crystal diodes: such as 1N4148, 1N4007, etc., with unidirectional conductivity, can be used for rectification, protection circuits, signal processing;

Inductors: common models such as TDK MLZ1608N100KT, etc., for energy storage, filtering, delay, trapping, etc.;

Crystal transistors: common S9013, S8050, etc., can play a signal amplification, switching control, voltage regulator and other roles;

Field effect transistors: such as IRFZ44N, SI2302, etc., can be applied to amplification, as a variable resistor, constant current source, electronic switches and so on;

Integrated circuits (IC): chips containing various functions, such as operational amplifiers LM358, microprocessor STM32F103, etc;

Connectors: such as row of pins 2.54mm, SMA interface, etc., used to connect the circuit board and external devices;

Relays: commonly used models such as G6S-2, etc., used to control high voltage and high current switching;

Light Emitting Diodes (LEDs): such as 5mm white and red LEDs, etc., which can be used for indicator lights, display devices, lighting, etc;

Sensors: including temperature sensor DS18B20, humidity sensor HIH6130, etc., used to detect environmental parameters or physical quantities;

Voltage regulators: such as 7805, LM1117, etc., used to stabilize the power supply voltage;

Crystals: common models are 12MHz, 8MHz, etc., used to generate clock signals;

Fuses: different specifications of fuses for circuit protection