The main role of a PCB Designer is to develop PCBs (Printed Circuit Boards). Each design will vary in size and complexity depending on the application. A computer, for example, contains one or more large trays hidden inside. Each tray is a PCB holding a variety of components including chips, micro-controllers, resistors and transistors, which must work together in a logical sequence for the computer to function correctly.A PCB designer works in front of a computer in an office, at a manufacturing facility. The designer's job is to create the board's functionality using specialized software. Each board must be designed to precise specifications, and the designer has to verify that it will work under various conditions.