Experience and skills to prevent poor soldering with electric soldering iron
1. Choose appropriate solder. It is recommended to use low melting point solder wire for welding electronic components.
2. Flux, use 25% rosin dissolved in 75% alcohol (weight ratio) as the flux.
3. The soldering iron must be tinned before use. Method: Heat the soldering iron. When the solder has just melted, apply flux, and then apply the solder evenly on the soldering iron tip so that the soldering iron tip is evenly coated. tin.
4. Welding method: Polish the pads and component pins cleanly with fine sandpaper, and apply flux. Dip an appropriate amount of solder with the tip of the soldering iron and touch it to the solder joint. After all the solder on the solder joint melts and immerses the lead of the component, gently lift the tip of the soldering iron upward along the lead of the component and away from the solder joint.
5. The welding time should not be too long, otherwise it will easily burn the components. You can use tweezers to clamp the pins to help dissipate heat.
6. The solder joint should be in the shape of a sinusoidal wave peak, the surface should be bright and smooth, without tin thorns, and the amount of tin should be moderate.
7. After the soldering is completed, use alcohol to clean the remaining flux on the circuit board to prevent the carbonized flux from affecting the normal operation of the circuit.
8. Finally, weld the integrated circuit to ensure reliable grounding of the soldering iron, or use residual heat to weld after power failure. You can also use a special socket for integrated circuits. After soldering the socket, plug the integrated circuit in.
9. The soldering iron needs to be placed on the soldering iron stand when not in use.
Basic steps of welding
1. In order to make the solder joint conductive well, first polish the soldering iron tip with sandpaper. Be careful not to over-wear the soldering iron tip, as excessive wear can easily lead to oxidation.
2. Turn on the electric soldering iron and heat it. When the temperature can melt the solder, apply flux to the soldering iron tip, and then apply the solder evenly on the soldering iron tip.
3. Touch the soldering iron tip with solder to the soldering point. When the solder is immersed in the soldering point, slowly pull up the soldering iron.
4. After welding is completed, turn off the power of the soldering iron and place it on the soldering iron stand. Be careful not to get burned by residual heat.
5. The residual flux on the circuit board can be cleaned with alcohol to prevent the carbonized flux from affecting the normal operation of the circuit.
