How does a PCB Allow Complex Electronics to Work?
PCB boards are largely applied around the world. They are in microwaves, computers, modern cars, aero plane, mobile phone, etc.
A printed circuit board first has a side of copper trace on it, which carries electricity around the board to complete the circuit. A PCB can have many different layers, but there will always be at least one side with copper tracing on it, bringing charge to the necessary places. The layers are important, however, since more complex electronics require more and more layers. The layers are made largely out of copper with various other metals around the edges, though it is what’s on the board that’s important. As the charge travels through the tracing, it also passes through the components of the PCB. The charge is diminished depending on what resistors it encounters, and when it is transferred through a transistor the charge grows to whatever it needs to be in order to power the electronics. There are also parts that will let charges through or block them depending on their positions, such as diodes and switches.
But how exactly does a PCB allow these complex electronics to work? Well, by itself, it can’t really do anything except power the LEDs and other components that are on the board. But when it is connected to other parts in a larger system, it can deliver electric charge to those parts and support the whole system physically due to the sturdiness of the boards. It delivers electricity through the copper tracing: really the key to the entire board and by extension, all the electronics the boards appear in.