• Ordinary circuits are generally simple circuits formed by basic electronic components (such as resistors, capacitors, inductors, diodes, transistors, etc.) connected by wires, and are mainly used to achieve some basic electrical functions, such as simple power supply, signal transmission, etc.
• Infrared touch PCBA (Printed Circuit Board Assembly) is a component formed by soldering various electronic components (such as chips, integrated circuits, various plug-in components, etc.) onto a PCB board through surface mount technology (SMT) or plug-in process on the basis of printed circuit board (PCB). It is a more complex integrated structure, which not only contains the connection part of the circuit, but also integrates many functional elements, which can realize complex functions, such as the PCB of the computer motherboard, which can realize various functions such as data processing, storage and communication of various interfaces.

Functional complexity

• The function of ordinary circuits is relatively simple. For example, the function of a simple series resistor divider circuit is simply to divide the input voltage in proportion to the resistor to provide the appropriate voltage for the subsequent components.
• The functions of PCB are rich and diverse. Taking the PCBA of the mobile phone as an example, it integrates a communication module (such as 4G/5G chip) for signal transmission and reception, a processor for running various programs, a memory chip for saving data, a power management module for charging and discharging control of the battery, and many other functions, which cooperate with each other to enable the mobile phone to operate a variety of complex tasks normally.

Crafting process

• The ordinary circuit manufacturing process is relatively simple, usually manual soldering or simple machine soldering, and the main focus is on the correctness and firmness of the connection when connecting wires and components. For example, in the laboratory, a simple experimental circuit can be set up, and the technician can connect the components and wires with a simple soldering tool.
• The PCBA manufacturing process is much more complicated. The first step is to design the PCB layout, considering many factors such as routing rules, signal integrity, and so on. When assembling PCBA, a high-precision placement machine is required for the SMD components to accurately place the components to the corresponding position of the PCB board, and then the components are firmly soldered on the PCB board through reflow soldering and other processes; For plug-in components, plug-in and wave soldering operations are also required, and the whole production process requires strict quality control to ensure the performance and reliability of PCBA.

Application scenarios

• Ordinary circuits are often used in some occasions with low functional requirements and simple structure. For example, in some simple electronic small productions, such as making a simple flashlight circuit, only a few components need to be connected to realize the lighting function.
• PCBA is widely used in a variety of complex electronic devices. For example, PCBA in industrial control equipment can realize the control of automated production processes; PCBAs in consumer electronics such as tablets and smart watches can provide powerful computing and interactive functions to meet the diverse needs of users.