What is a printed circuit?
Any modern electrical device requires a huge number of connections to join together all the small components needed for it to work effectively. At one time these connections were made by wires that had to be soldered together. The wires have now been replaced by the printed circuit, which is effectively a picture of the wiring that works just as well.
A thin sheet of copper is attached to a special board made of insulating material. An image of the electrical circuit is then printed photographically onto the copper sheet. Chemicals are used to dissolve most of the copper, leaving behind a thin film of metal bands, to which all the necessary components can be attached. This process can be carried out automatically.
Picture credit: google
What does ‘electronics’ mean?
Electronics depends on electricity. It uses changes in the voltage of an electrical current to convey messages or signals, usually in a coded form. The use of electronics is responsible for many activities that we now take for granted, such as radio and television, computers and calculators.
Picture credit: google