Circuit boards have been in the market since the World War days. It is used in many electric items and conveniences to hold electric component parts such as junction transistors, Light emitting diodes, electrical fuses, and others. Using conductive pathways or tracks, it connects various electronic peripheral devices to perform specific functions, just like in wireless to get radio signals using different absolute frequencies and later change over it to sound waves to which multitudes may hear. Almost all commercially created electronic devices have printed circuit boards (PCB) in them.
