Soldering is the process of joining metal pieces together, usually with the intent to carry an electrical current. This badge asserts that the earner has a basic understanding of soldering and has demonstrated their ability to use a soldering iron and solder a variety of joints.

Difficulty: Intermediate
Estimated Time: 20 hours. This includes the time to learn and practice the skills and complete the project.


  1. Explain the safety precautions that should be used when soldering.
  2. Describe the basic care and preparation of a soldering iron and soldering station.
  3. Identify and describe the following tools as they relate to soldering:
    • Soldering iron
    • Soldering iron holder
    • Cleaning sponge
    • Lead-free solder
    • Leaded solder
    • Wire cutters
    • Desoldering wick
    • Desolder pump
    • “Helping hands”
    • Exhaust fan
    • Safety goggles
  4. Describe the difference between through-hole mounts, surface mounts, and wire soldering and explain when you would use each.
  5. Demonstrate each of the following:
    • Through-hole mounts
    • Soldering wire
  6. Demonstrate each of the following desoldering methods:
    • Using the soldering iron
    • Using the solder sucker or desolder pump
    • Using the desoldering wick
  7. Describe each of the following soldering problems and how to troubleshoot each:
    • Solder bridge
    • Too much solder
    • Disturbed joint
    • Cold joint
    • Insufficient wetting of the:
      • Pad
      • Pin

Project Ideas:

Here are some suggested projects. Remember, whichever project you select should use the skills listed in the Requirements. If you have another project idea, make sure to get it approved by the program staff before proceeding.

Complete an electronics project that demonstrates the following skills:

  1. Through-hole mounts on a circuit board and,
  2. Soldering wire


Once the project is complete, the next step is to submit an application for review. In this, you’ll need to submit a description of the project and an explanation of how you’ve used the required skills. Additionally, you’ll need to submit a link to your completed portfolio entry for the project.

Soldering Badge Application

This is the application for the Soldering Badge.
  • Please refer to the project badge page and make sure that your project includes the necessary skills. Images and a brief description are an ideal way to do this.

One of the fields on the application asks for you to submit the link to your project webpage that includes photos and a description. There are lots of free web portfolio resources. Here are some web portfolio resources for hosting your project:

  • WordPress.com: WordPress.com is a free blogging platform where you can host a portfolio page for your projects. If you’re working on the digitalharbor.org/wordpress-skill-badge, this would be a good way to practice your skills.
  • Weebly: Weebly is another resource that you can use to host a portfolio page for your project. There are paid plans available, but the free plan would be more than enough to host your badge project.
  • Tackk: Tackk is another free resource to build out a quick portfolio entry. Tackk has added a lot of social media streams and content, so if you’re using this make sure to monitor this aspect.

If you’re unable to create a webpage for your submission, you can create a Google Document and place your writeup and images in that document. You can then submit the URL for that.


There are several excellent soldering resources out there, but the best way to develop your skills is to practice. Here are some to get you started:

Getting Started:

Ask Us a Question

If you’re working on the badges and you find that you’re stuck, please feel free to email us for some guidance!
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If you’re having any difficulties with the above email link, here is a link to the DHF Contact page.
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