🧩 A computer PCB (Printed Circuit Board) is the backbone of nearly every electronic device—it’s the platform that holds and connects all the essential components that make a computer work.

🧠 What a Computer PCB Does

• Acts as a physical base for mounting components like CPUs, RAM, and connectors
• Provides electrical pathways (called traces) that allow signals and power to flow between components
• Ensures mechanical stability and organized layout for efficient performance

🧱 Structure of a PCB

• Substrate: Usually made of fiberglass (FR4), giving the board strength and insulation
• Copper layers: Etched into intricate patterns to form circuits
• Solder mask: A protective layer (often green) that prevents short circuits
• Silkscreen: Labels and markings to identify components and connections

🧰 Types of Computer PCBs

• Motherboards: The main PCB in desktops and laptops, connecting CPU, memory, storage, and peripherals
• Single-board computers (SBCs): Compact PCBs with all components integrated (like Raspberry Pi)
• Expansion cards: Graphics cards, sound cards, and network cards are all specialized PCBs

🧪 Real-World Example

Think of a computer PCB like a city map:

• The copper traces are roads
• The components are buildings
• The solder mask is the zoning layer that keeps everything in order