An electronic circuit is an association of electrical and electronic components in particular ( such as diodes and transistors ) to an ( functional ) arrangement. It differs from an electrical circuit by the use of electronic components.
Electronic circuits can perform very simple functions, such as the flashing of a lamp or the control of an automatic door. But also many complex technical devices, such as televisions or computers are electronic circuits based, often in the form of integrated circuits.
They are schematically shown as a circuit diagram. They can be realized in practice in most cases to printed circuit boards, the components are connected together by solder.