Common PCB circuit diagrams primarily consist of four types: schematic diagrams, block diagrams, assembly diagrams, and printed board diagrams.
(1) Schematic diagram, often referred to as an “electrical schematic diagram.” This type of diagram directly represents the structure and operational principles of the electronic circuit, making it essential for circuit design and analysis. When analyzing the circuit, one can discern the actual working principle by identifying the various component symbols depicted in the drawing and their interconnections. The schematic diagram serves as a tool to illustrate the functioning of the electronic circuit.
(2) Block diagram. A block diagram is a type of circuit diagram that employs blocks and connecting lines to illustrate the working principles and composition of the circuit. Fundamentally,
This is also a type of schematic diagram, but in this format, there are primarily boxes and lines, with very few other symbols. The main distinction between this and the previously mentioned schematic diagram is that the schematic diagram includes a detailed depiction of all circuit components and their connection methods. In contrast, the block diagram categorizes the circuit into several functional parts, illustrating each part as a box. A brief text description is added within each box, and lines (sometimes with arrows) connect the boxes to show their relationships. Consequently, the block diagram serves primarily to convey the general working principle of the circuit, while the schematic diagram can be used both to illustrate the circuit’s working principle in detail and to assist in the collection of components and circuit assembly.
(Three) Assembly Drawing. This type of drawing is used for circuit assembly, and it typically features representations of the physical appearance of circuit components. By following the illustrations and connecting the components as shown, one can successfully complete the circuit assembly. This kind of diagram is generally intended for beginners. Assembly drawings vary based on different assembly templates. In most cases involving electronic products, the PCB circuit boards discussed below are utilized, making printed board drawings the predominant form of assembly diagrams. To facilitate earlier engagement with electronic technology, we initially chose the screw hole board as the basic installation template, leading to a different approach for the installation drawing.
(Four) Printed Board Diagram. The full name of this diagram is “printed circuit board diagram,” which is fundamentally the same type of circuit diagram as the assembly drawing and is used for assembling the actual circuit. A printed circuit board features a layer of metal foil on an insulating substrate, with unnecessary metal foil corroded away. The remaining metal serves as the connections between circuit components, which are then mounted on the insulating substrate. The leftover metal foil acts as conductive pathways to complete the circuit. As the metal used is typically copper, printed circuit boards are also known as “copper clad laminates.”
The component layout on the printed board diagram often differs significantly from the schematic diagram. This is primarily due to the design of the printed circuit board, which emphasizes the rational distribution and connection of components. Factors such as component size, heat dissipation, interference resistance, and coupling considerations all play a role. As a result, while the external appearance may not perfectly match the schematic, the printed circuit board is better optimized for the circuit’s functionality. With advancements in technology, printed circuit board manufacturing has evolved significantly; in addition to single-sided and double-sided PCBs, multi-sided PCBs are now prevalent across daily life, industrial production, national defense, and aerospace sectors, among others. Of the four types of circuit diagrams discussed, the electrical schematic is the most commonly used and most critical. A solid understanding of the schematic diagram equips one with the foundational knowledge to grasp circuit principles. From there, creating block diagrams, designing assembly diagrams, and producing printed board diagrams becomes straightforward. Mastering the schematic diagram also simplifies the repair and design of electrical appliances. Thus, the focus should be on mastering the schematic.
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(1) Schematic diagram, often referred to as an “electrical schematic diagram.” This type of diagram directly represents the structure and operational principles of the electronic circuit, making it essential for circuit design and analysis. When analyzing the circuit, one can discern the actual working principle by identifying the various component symbols depicted in the drawing and their interconnections. The schematic diagram serves as a tool to illustrate the functioning of the electronic circuit.
(2) Block diagram. A block diagram is a type of circuit diagram that employs blocks and connecting lines to illustrate the working principles and composition of the circuit. Fundamentally,
This is also a type of schematic diagram, but in this format, there are primarily boxes and lines, with very few other symbols. The main distinction between this and the previously mentioned schematic diagram is that the schematic diagram includes a detailed depiction of all circuit components and their connection methods. In contrast, the block diagram categorizes the circuit into several functional parts, illustrating each part as a box. A brief text description is added within each box, and lines (sometimes with arrows) connect the boxes to show their relationships. Consequently, the block diagram serves primarily to convey the general working principle of the circuit, while the schematic diagram can be used both to illustrate the circuit’s working principle in detail and to assist in the collection of components and circuit assembly.
(Three) Assembly Drawing. This type of drawing is used for circuit assembly, and it typically features representations of the physical appearance of circuit components. By following the illustrations and connecting the components as shown, one can successfully complete the circuit assembly. This kind of diagram is generally intended for beginners. Assembly drawings vary based on different assembly templates. In most cases involving electronic products, the PCB circuit boards discussed below are utilized, making printed board drawings the predominant form of assembly diagrams. To facilitate earlier engagement with electronic technology, we initially chose the screw hole board as the basic installation template, leading to a different approach for the installation drawing.
(Four) Printed Board Diagram. The full name of this diagram is “printed circuit board diagram,” which is fundamentally the same type of circuit diagram as the assembly drawing and is used for assembling the actual circuit. A printed circuit board features a layer of metal foil on an insulating substrate, with unnecessary metal foil corroded away. The remaining metal serves as the connections between circuit components, which are then mounted on the insulating substrate. The leftover metal foil acts as conductive pathways to complete the circuit. As the metal used is typically copper, printed circuit boards are also known as “copper clad laminates.”
The component layout on the printed board diagram often differs significantly from the schematic diagram. This is primarily due to the design of the printed circuit board, which emphasizes the rational distribution and connection of components. Factors such as component size, heat dissipation, interference resistance, and coupling considerations all play a role. As a result, while the external appearance may not perfectly match the schematic, the printed circuit board is better optimized for the circuit’s functionality. With advancements in technology, printed circuit board manufacturing has evolved significantly; in addition to single-sided and double-sided PCBs, multi-sided PCBs are now prevalent across daily life, industrial production, national defense, and aerospace sectors, among others. Of the four types of circuit diagrams discussed, the electrical schematic is the most commonly used and most critical. A solid understanding of the schematic diagram equips one with the foundational knowledge to grasp circuit principles. From there, creating block diagrams, designing assembly diagrams, and producing printed board diagrams becomes straightforward. Mastering the schematic diagram also simplifies the repair and design of electrical appliances. Thus, the focus should be on mastering the schematic.
If you have any PCB manufacturing needs, please do not hesitate to contact me.Contact me
