taurusbucket4 – https://hdicircuitboard.com/what-is-a-south-facing-pcb/

A printed motherboard, or PCB, is the foundation of many modern electronics. When people ask “what is a PCB,” “what does PCB stand for,” or “what is a PCB board,” they are usually referring to the flat board that mechanically supports and electrically links electronic components. In electronics, the PCB full form is printed circuit board, and in everyday use, terms like PCB board, circuit card, PC board, and electronics PCB all indicate the very same core idea: a split board that routes signals and power between parts such as resistors, capacitors, incorporated sensors, adapters, and circuits. Without the PCB, many electronic products would be large, unreliable, and much more difficult to manufacture. what is south-facing pcb specifies the physical structure of the gadget’s circuitry, making it possible to build every little thing from mobile phones and medical devices to commercial controllers, auto components, and high frequency printed motherboard systems used in radio and microwave applications.