Take the core component of each functional circuit as the center, and carry out the layout around it. The components should be arranged evenly, neatly and compact on the PCB, and the leads and connections between the components should be reduced and short
Internal equivalent PCB circuit and application PCB circuit some of the lead out feet are not marked, encounter empty lead feet, should not be grounded without permission,
All of these problems can cause the solder shield to detach from the circuit board and eventually lead to corrosion of the copper circuit. Poor insulation characteristics can cause short circuits due to unexpected electrical connectivity/arcing.
The inner laser hole needs to be electroplated and filled, and then the outer laser hole is made. The price is more expensive than the error hole.
This simple statement connects the common sense of capacitance with the newly discovered theory of characteristic impedance.
the traditional aluminum sheet plugging process is changed, and the plate surface welding and plugging are completed with white mesh. Stable production and reliable quality.
Pin tin absorption can also be reduced by a flux with a slower wetting rate and a higher active temperature, or by a solder paste with different proportions of Sn/Pb to block melting.
The resistance value of the terminal resistance should match the characteristic impedance of the line. This can be done manually or by CAD tools to calculate the characteristic impedance value and the terminal matching resistance value.
Causes of reflected signals: excessively long lines, unterminated transmission lines, excessive capacitance or inductance, and impedance mismatch.
The success of a product, one is to pay attention to the internal quality, two is to take into account the overall beauty, both are more perfect in order to consider the product is a success.
There is a little bit of short circuiting between digital and analog, but note that there is only one connection point. There are also differences on the PCB, which is determined by the system design.
Notice When the laser holes and the inner buried holes are inserted together, that is, the holes of the two drilling belts are in the same position, you need to move the laser holes to ensure electrical connection.
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