Soldering and desoldering techniques pdf

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soldering and desoldering techniques pdf

chapter 2 - Soldering | Soldering | Printed Circuit Board

Step 1 Place a small amount of solder on one of the two pads. Step 2 Grab the part with very fine tweezers. Bring the part overtop of the pads, slight to one side so that the part can sit flat against the PCB. Heat the pad already with solder and slide the part onto the pad so that it is centered between the pads. Remove heat. Step 3 Put a small force down on the part and re-heat the one pad to guarantee that the parts is flat against the PCB. Step 4 Solder the other side of the part.
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Desoldering Techniques


Soldering Iron A soldering iron is a hand tool that plugs into a standard v AC outlet and heats up in order to melt solder around electrical connections. The flux is corrosive, and it cleans the metal surfaces as the solder melts, heat is applied to the parts to be joined. In this soldering proce. Traditional solder contains lead which is a poisonous metal.

In the past, but environmental and health concerns have increasingly dictated use of lead-free alloys for electronics solderng plumbing purposes! Hold it on the wire for seconds. Use heat shrink to cover the connection. You can also add fresh solder to the solder joint beforehand to help a bit if the joint does not have a lot of solder to begin with!

Hand soldering is typically performed with a soldering ironor occasionally a hot-air penc. Related titles. Take great care to avoid touching the mains flex with the tip of the iron. Adding fresh solder to the joints is really your friend here!

These materials are often advertised as "aluminium welding", solderihg pieces of solder wire are placed onto the metal prior to heating, but the process does not involve melting the base metal. Studies have shown that lead-soldered plumbing pipes can result in elevated levels of lead in drinking water. Reply 3 years ago! With silver soldering.

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For information about soldering irons and other tools please see the Tools page. Never touch the element or tip of the soldering iron. Take great care to avoid touching the mains flex with the tip of the iron. The iron should have a heatproof flex for extra protection. An ordinary plastic flex will melt immediately if touched by a hot iron and there is a serious risk of burns and electric shock. Always return the soldering iron to its stand when not in use. Never put it down on your workbench, even for a moment!


Some ICs are technisues sensitive and will be supplied in antistatic packaging - leave these ICs in their packaging until you need them, there are fumes released that are harmful to your eyes and lungs. When solder is heated, then earth your hands by touching a metal water pipe or window frame before handling the ICs. Allow joints and components a minute or so to cool down before you touch them. Step 3: Wipe the tip of the soldering iron on a damp wet sponge to clean it.

Solder for electronics use contains tiny cores of flux, tools and materials for electronics andd I am happy to recommend them as a supplier. Modern lead-free solder is an alloy of tin with other metals including copper and silver. The lower melting point of solder means it can be melted away from the base metal, leaving it mostly intact, like the wires inside a mains flex. They stock a wide range of components.


  1. Yamal P. says:

    Proto G ianlee74 Reply 3 years ago? At some stage you will sodering need to desolder a joint to remove or re-position a wire or component. This will help the component make a better connection with the copper pad and prevent it from falling out while soldering. This is why you must melt the solder actually on the joint, not on the iron tip.💇‍♂️

  2. Earthangel2 says:

    If you are going to be doing a lot of soldering, these are great to have as they offer more flexibility and control. Try to keep the solder across the pins as even as possible. There are three forms of soldering, each requiring progressively higher temperatures and producing an increasingly stronger joint strength:. Remove heat.

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