For a PCB engineer, how to design the performance of a PCB can not be reflected by the parameters simulated by software. Only the board production, personally welding, determine the actual performance, can truly achieve mass production. Because in the actual production process, the process and component welding will always bring some problems that cannot be simulated, thus affecting the electrical performance. Believe that so many people should have the kind of painful experience of welding PCB board, let’s talk about how to manual welding PCB.

1. Determine the layout of power supplies and ground cables

Power supply throughout the circuit, reasonable power supply layout to simplify the circuit plays a very key role. Some circuit boards are arranged with copper foil throughout the board, which should be used as power lines and ground lines; If there is no such copper foil, you also need to have a preliminary plan for the layout of power cables and ground cables.

2. Good at using the pins of components

Circuit board welding needs a lot of jumper, jumper, etc., do not rush to cut off the redundant pins of components, sometimes directly connected to the surrounding components to be connected to the pin will get twice the result with half the effort. In addition, in order to save materials, the cut component pins can be collected as jumper materials.

3. Be good at setting jumpers

In particular, multiple jumpers not only simplify the connection, but also make it much more beautiful,

4. Be good at using the structure of components

We use a typical example of the component’s own structure: the touch button has four legs, two of which are connected. We can take advantage of this feature to simplify the connection, and the electrically connected two legs act as jumpers.

5. Use the needle row

I like to use row stitches because they have many flexible uses. For example, two boards are connected, you can use a pin and a seat. The row of pins not only plays the role of mechanical connection between two boards, but also plays the role of electrical connection. This point borrows from the computer board connection method.

6. Cut off the copper foil as needed

When using the perforated plate, in order to make full use of the space, a knife can be used when necessary to cut off a copper foil, so that more components can be placed in a limited space.

7. Take advantage of dual panels

Dual panels are expensive, so make the most of them. Each pad of the double panel can be used as a through-hole, flexible realization of positive and negative electrical connection.

8. Make full use of the space on the board

If it is a development board, it is possible to hide the holes and small components under the larger chip, but generally we do not recommend this, because in the follow-up maintenance and inspection, if there is a problem, it is difficult to repair.