Part of the lighting circuit

The circuit is the path through which the current passes. It is the whole that is connected by electrical equipment and components in a certain way. There are various circuits in daily life and industrial control, which are used in lighting circuits everywhere, sensor detection circuits such as temperature, pressure and position angle in automobiles.

The role of the circuit has two aspects: first, to achieve energy conversion, transmission and distribution (such as power system circuits, etc.), that is, power circuits; second, to achieve the processing and transmission of electrical signals (such as broadcast television systems), that is, signal circuits.

The circuit generally consists of a power supply, a load, and an intermediate link. Devices and devices that supply electrical energy in a circuit are called power supplies, and electrical devices or components are called loads. The flashlight circuit is a simple and practical circuit. This circuit consists of a power supply - dry battery, load - small bulb, switch and connecting conductor - flashlight metal shell, see figure).