Electronic circuit diagram, also known as circuit diagram or circuit schematic diagram, is a drawing that reflects the electrical connection relationship of various components in electronic products and electronic equipment. It is an engineering language, which can help people get familiar with the circuit structure and working principle of electronic equipment as soon as possible. Therefore, understanding the circuit diagram is an important part of learning electronic technology, a prerequisite for electronic production or maintenance, and a basic skill that electronic technology enthusiasts must master.
Composition of electronic circuit diagram
The circuit diagram mainly consists of four parts: component symbols, connections, nodes and comments. Symbols of elements represent elements in the actual circuit, and their shapes are not necessarily similar to the actual elements, or even completely different. But it generally shows the characteristics of components, and the number of pins is consistent with the actual components.
Connecting wires represent the conductors in the actual circuit. Although it is a line in the schematic diagram, it is often not a line but a copper foil block of various shapes in the commonly used printed circuit board, just like many connections in the radio schematic diagram are not necessarily straight lines in the printed circuit board diagram, but can also be a copper film of a certain shape.
Nodes represent the connection relationship between several component pins or several wires. All component pins and wires connected to nodes, regardless of the number, are conductive. Notes are very important in the circuit diagram, and all the words in the circuit diagram can be classified as notes. If you look at the picture above carefully, you will find that there are notes in each part of the circuit diagram to explain the model and name of the components.