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PCB Cross Wiring Processing Method

In the double-sided PCB board, the front and back wiring can be used to solve the problem when the wiring is crossed. In single-sided circuit board design, jumper wires are often used when some lines cannot be connected. For beginners,jumper wires are often random, with long and short ones, which will bring inconvenience to production. When placing jumper wires, the fewer types, the better. Usually only 6mm, 8mm, and 10mm are available. Anything beyond this range will cause inconvenience in production. In addition, there are the following methods to make the wires cross and realize the role of jumper wires.

1. Add Cross-Line or Zero-Ohm Resistance
Connecting wires on the reverse side of the circuit board is called a jumper. If the length of the jumper in the same circuit board is not uniform, it will affect the appearance. The length of the jumper should be consistent with small components (such as resistors). If the zero-ohm resistor is installed, it will be more tidy, so that people will not feel the existence of cross-line.

 

2. Component Substitution Method
For example, a certain jumper is connected in series with an 18KΩ resistor. When the resistance is changed to 15KΩ, and a 3KΩ resistor is installed at the jumper, the total value is still 18kΩ, and the jumper is cancelled.

 

3. Printing Cross Line.
After the single-sided board is printed with the crossover, the connection can be crossed, but the manufacturing cost of the printed board will be slightly higher.

 

4. Labyrinth Wiring
In low-speed digital circuits, in order to route on the same printed board surface, the labyrinth wiring method can be used to route the wires often between two solder joints with close holes. Due to the high wiring density and narrow line width, the ratio of the circuit board diagram is required to be selected relatively large.

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