Soldering iron - appearance of ideal solder joints
Appearance of an ideal solder joint:
① The shape is approximately conical and the surface is slightly concave, in the shape of a gentle slope, with the welding wire as the center, and symmetrically spread out in a skirt shape. The surface of the virtual solder joint is often protruding outward, which can be identified.
② On the solder joint, the connection surface of the solder is concave and naturally transitions, the junction between the solder and the weldment is smooth, and the contact angle is as small as possible.
③ The surface is smooth and has a metallic luster.
④ No cracks, pinholes, or slag inclusions.
For the layout of components on the perforated board, most people are used to "follow the vines", that is, to focus on key components such as chips, and insert other components as needed. This method is planning while welding, order is reflected in disorder, and the efficiency is high. However, due to the lack of experience for beginners, this method is not suitable for use. Beginners can first make a preliminary layout on paper, and then use a pencil to draw on the front of the perforated board (component surface), and then also plan the wiring Come out to facilitate their own welding.
For the welding method of the perforated board, the thin wires mentioned above are generally used for flying wire connection. There is not much skill in flying wire connection, but try to make horizontal and vertical wires neat and clear. Now there is a popular method on the Internet called the tin connection and routing method. The process is good and the performance is stable, but it is a waste of tin. Pure tin wiring is more difficult and is affected by various aspects such as tin wire and personal welding process. If you pull a thin copper wire first, and then drag and weld with the thin copper wire, it is much simpler. The welding method of the perforated board is very flexible and varies from person to person, just find the method that suits you.
