Studious. Circuit board drilling is to turn the cone left and right by hand to drill holes on the board, which is very simple and easy to learn. A board with many small parts installed inside an electrical appliance is called a circuit board (also called PCB), which is just a general term. According to different uses, the name is different. For example, the motherboard in a computer is a circuit board. A graphics card is also a circuit board. In short, the circuit board is just a place where parts and wires are placed to complete electrical functions.