What is a PCB and what is its purpose? Explain the basic components of a PCB What are the key considerations for PCB design? What are the different types of PCBs? What is the difference between a single-sided and a double-sided PCB? What is the importance of a ground plane in PCB design? What is the purpose of vias in a PCB? Explain the concept of impedance control in PCB design. What is the difference between an analog and a digital ground plane? How do you determine the appropriate trace width for a PCB?