[miraclepwb]

The basic purpose of a PCB or Printed Circuit Board is to create a platform that can accept the necessary number of components. This is to allow the hardware to function as desired. In other words, they are printed circuit boards.
A PCB is a two-sided board that has copper tracks etched onto each side. The copper tracks act as wires to carry electrical signals between components on the board.
The copper is covered with a plastic or epoxy coating called a "dielectric". The dielectric can be a high temperature material such as ceramic, or it can be a low temperature material such as FR4 epoxy glass laminate.

P.S. It can be 2 layer pcb board, 4 layer pcb board or 6 layer pcb board. Each layer determines the quality, specific needs and component selection.

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