Resistance is an electronic component with resistance characteristics, and it is one of the most widely used components in PCBA. Resistance is divided into fixed resistance and variable resistance (potentiometer), which plays the role of voltage division, shunt and current limiting in the circuit.
Capacitance is also one of the basic components in PCBA processing. It is a component that stores electric energy and plays the roles of coupling, filtering, dc isolation and tuning in electronic circuits.
3. Inductance coil
Inductance coil is called inductance for short, which has the function of storing magnetic energy.
A resistor whose resistance value can be changed, that is, a resistor which can be continuously adjusted within the specified range, is called a potentiometer.
The transformer is composed of an iron core (or a magnetic core) and a coil. The coil has two or more windings, among which the windings connected to the power supply are called primary windings and the rest are called secondary windings.
Transformer is transform voltage, current and impedance of the device, when the primary zhongtong have alternating current coil, iron core (or core) to produce ac magnetic flux, the induced voltage in the secondary coil (or current) transformer is mainly used for ac voltage change, current, power transmission, impedance transformation and cushioning isolation, etc., is one of the indispensable important component in the PCBA machine.
6. Crystal diode
Crystal diode (semiconductor diode, hereinafter referred to as the diode) is made of a PN junction, electrode leads and external sealed shell, it has the characteristics of unidirectional conductivity.
Transistor is the core component of signal amplification and processing, which is widely used in PCBA.
8. Field effect tube
Field effect transistor (fet) is also a kind of semiconductor device with PN junction. Different from triode, it does not take advantage of the conductive characteristics of PN junction, but its insulation characteristics.
9. Electroacoustic devices
The devices used to complete the conversion between electrical signals and sound signals in the circuit are called electroacoustic devices, which have various types, such as loudspeaker, microphone, earphone (or earplug), microphone, receiver and so on.
10. Optoelectronic devices
Photoconductive devices that use semiconductor photosensitive properties, photocells and semiconductor light-emitting devices that use semiconductor photogenerating voltage effect are collectively referred to as photoelectric devices.
11. Display devices
Electronic display device refers to the photoelectric conversion device that converts electrical signals into optical signals, namely, the device used to display Numbers, symbols, words or images. It is the key component of electronic display device and has a great impact on the performance of the display device.
A device or device, usually composed of a sensing element and a converting element, that can sense a specified measured and convert it into a usable signal according to certain rules
13. Surface-mounted components
Surface mounted components (SMC and SMD), also known as SMC components or chip components, it includes resistors, capacitors, inductors and semiconductor devices, etc., with small size, light weight, no lead or very short lead, high installation density, high reliability, good anti-vibration performance, easy to achieve automation and other characteristics.
14. Silicon controlled
SCR, short for SCR rectifier element, is a kind of four-layer high-power semiconductor device with three PN junction, also known as thyristor. It is one of the commonly used semiconductor devices with small size, relatively simple structure and strong function.
15. Switches, relays and various connectors
A relay is an automatic control device in which the output of an input quantity (electrical, magnetic, acoustic, optical, or thermal) changes by leaps and bounds when it reaches a certain value.