Explanation:
A diagram that uses circuit component symbols to represent circuit connections is called a circuit diagram. A circuit diagram is a schematic layout diagram that represents the composition of each component and the relationship between the components, drawn using standardized symbols of physical electricity for the needs of research and engineering planning. From the circuit diagram, you can know the working principle of the components, and provide planning solutions for analyzing performance and installing electronic and electrical products. When designing a circuit, engineers can calmly do it on paper or on a computer, and then proceed to actual installation after confirming it is complete. Improve through debugging, fix bugs, until success. Using circuit simulation software for circuit-assisted design and virtual circuit experiments can improve engineers' work efficiency, save learning time, and make physical diagrams more intuitive.
Category:
Circuit diagrams include schematic diagrams, block diagrams, assembly diagrams and printed board diagrams, etc.
(1) Schematic diagram, also called "electrical schematic diagram". This kind of diagram is generally used in designing and analyzing circuits because it directly reflects the structure and working principle of electronic circuits. When analyzing a circuit, you can understand the actual working principle of the circuit by identifying the various circuit component symbols drawn on the drawing and the connection methods between them. The schematic diagram is a tool used to reflect the working principle of the electronic circuit. .
(2), block diagram (block diagram). A block diagram is a circuit diagram that uses boxes and connections to represent the working principle and composition of a circuit. Fundamentally speaking, this is also a schematic diagram, but in this kind of drawing, except for boxes and connections, there are almost no other symbols. The main difference between it and the schematic diagram above is that the schematic diagram details all the components of the circuit and their connections, while the block diagram simply divides the circuit into several parts according to function and depicts each part. Form a box, add a simple text description in the box, and use connecting lines (sometimes with arrows) between the boxes to explain the relationship between the boxes. Therefore, the block diagram can only be used to reflect the general working principle of the circuit, while the schematic diagram, in addition to showing the working principle of the circuit in detail, can also be used as a basis for collecting components and making the circuit.
(3) Assembly drawing. It is a kind of drawing used for circuit assembly. The symbols on the drawing are often the physical appearance drawings of circuit components. We only need to follow the diagram and connect some circuit components to complete the circuit assembly. This type of circuit diagram is generally for beginners. Assembly drawings vary according to different assembly templates. Most electronic products use printed circuit boards, which will be introduced below, so printed board drawings are the main form of assembly drawings. When we first learned about electronic knowledge, in order to be exposed to electronic technology earlier, we chose a screw hole plate as the basic installation template, so the installation diagram became another model.
(4). Printing plate diagram. The full name of the printed circuit board diagram is "printed circuit board diagram" or "printed circuit board diagram". It actually belongs to the same type of circuit diagram as the assembly diagram, and both are used for assembling actual circuits. Printed circuit boards are made by first covering an insulating board with a layer of metal foil, and then corroding away the metal foil that is not needed for the circuit. The remaining metal foil is used as a connecting wire between circuit components, and then the components in the circuit are The device is mounted on this insulating board, and the remaining metal foil on the board is used as a conductive connection between the components to complete the circuit connection. Since one or both sides of this circuit board are covered with copper, the printed circuit board is also called "copper-clad board". The component distribution in the printed circuit board diagram is often very different from that in the schematic diagram. This is mainly because in the design of printed circuit boards, the main consideration is whether the distribution and connection of all components are reasonable, and many factors such as component volume, heat dissipation, anti-interference, anti-coupling, etc. must be considered. The printed circuit board designed based on these factors , it is difficult to be completely consistent with the schematic from the outside; but in fact it can better realize the function of the circuit. With the development of science and technology, the production technology of printed circuit boards has now made great progress; in addition to single-panel and double-panel, there are also multi-panel, which have been widely used in daily life, industrial production, national defense construction, aerospace industry, etc. field.
Among the four forms of circuit diagrams introduced above, the electrical schematic diagram is the most commonly used and important. If you can understand the schematic diagram, you will basically master the principles of the circuit. Drawing block diagrams, designing assembly diagrams, and printed board diagrams are all relatively easy. Easy. It is also very convenient to carry out electrical maintenance and design after mastering the schematic diagram. Therefore, the key is to master the schematic.