The schematic diagram, as its name implies, is a diagram showing the connection principle between devices on the circuit board. In the forward research of scheme development, schematic diagram plays a very important role.

Extending from the schematic diagram will involve PCB layout, that is, PCB wiring. Of course, this wiring is done according to the schematic diagram. By analyzing the schematic diagram and other conditions of the circuit board, the designer can determine the position of the device and the number of layers of the circuit board.