How to Solder - Through-hole Soldering

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Contributors: Joel_E_B
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Advanced Techniques and Troubleshooting

Once you get the basics of creating good solder joints, it’s time to learn some of the more advanced PTH techniques that you can utilize. This video goes over using flux, removing solder jumpers, desoldering components, along with some other tips and tricks.

Here are some other tips for PTH soldering:

  • Desoldering can often be the best way to learn how to solder. There are many reasons to desolder a part: repair, upgrade, salvage, etc. Many of the techniques used in the video aid in the desoldering process.

  • There is another method of removing solder from through-holes that we refer to as the slap method.

  • If you’re ever unsure if the solder joint you created is making an electrical connection, you can use a multimeter to test for continuity.

Cleaning

When working with lead-free solder, flux tends to get everywhere, be it from the flux in the solder or from external flux applied by the user. Flux can corrode the PCB and components over time, thus it’s good to know how to clean your PCBs so they’re free of any flux residue. The simplest way to clean a board is to use a small brush (toothbrushes work great) and some isopropyl alcohol. If you are soldering more than a few boards, it may be necessary to clean them in batches. For this, we recommend a crock pot filled with distilled water. The distilled water keeps other impurities and contaminants away from your circuit.

It’s not 100% necessary to clean your board, however, it will increase the life of your circuit tremendously. For more information on PCB cleaning, click here.