sleep monitoring digital fingertip pulse oximeter PCB

What PCB means? 

1. PCB (Printed Circuit Board), the Chinese name is printed circuit board, also known as printed circuit board. It is an important electronic component, a support for Electronic Components, and a carrier for electrical connection of electronic components. Because it is made by electronic printing, it is called a "printed" circuit board.
2. The role of PCB:
After electronic equipment adopts printed boards, due to the consistency of similar printed boards, manual wiring errors are avoided, and electronic components Wave Solder for PCBA or Surface-Mount (SMT) &BGA Assembly, automatic soldering, and automatic detection can be realized. , To ensure the quality of electronic equipment, improve labor productivity, reduce costs, and facilitate maintenance.
The reason why PCB can be used more and more widely is that it has many unique advantages, which are summarized as follows:
1. It can be high-density. For decades, the high density of printed boards has been able to develop along with the improvement of integrated circuit integration and the advancement of mounting technology.
2. High reliability. Through a series of inspections, tests and aging tests, the PCB can work reliably for a long time (usually 20 years).
3. Designability. For the various performance requirements of PCB (electrical, physical, chemical, mechanical, etc.), printed board design can be realized through design standardization, standardization, etc., with short time and high efficiency.
4. Manufacturability. With modern management, standardized, scaled (quantitative), automated and other production can be carried out to ensure product quality consistency.
5. Testability. A relatively complete test method, test standard, various test equipment and instruments have been established to detect and appraise the eligibility and service life of PCB products.
6. Assemblability. PCB products are not only convenient for standardized assembly of various components, but also for automated and large-scale mass production. At the same time, PCB and various component assembly parts can be assembled to form larger parts and systems, up to the complete machine.
7. Maintainability. Since PCB products and various component assembly parts are designed and produced on a large scale, these parts are also standardized. Therefore, once the system fails, it can be replaced quickly, conveniently and flexibly, and the system can be quickly restored to work. Of course, there can be more examples. Such as miniaturization and weight reduction of the system, and high-speed signal transmission.