Printed circuit boards, or PCBs, are the structure of virtually every electronic product today. If you have actually ever wondered "what is a PCB," the most basic response is that it is the board that mechanically supports and electrically attaches elements in a device. A PCB board can be found http://ezproxy.cityu.edu.hk/login?url=https://hdicircuitboard.com/what-is-pcb-in-electronics/