Cleaning Up Solder Joints
Take a look for these issues in your build:
- "Blob" joints where the solder doesn't form a neat "tent" around the lead. This is from either too much solder or not enough heat.
- Joints that don't cover the pad completely.
- "Cold" solder joints where the joint is not perfectly shiny and uniform. This is the result of not enough heat during soldering.
Follow this process to re-flow any suspect joints:
- Get your soldering good and hot, make sure the tip is clean (no black oxidation) and tinned (plenty of solder covering the tip)
- Heat the solder joint, touching the iron to where the pad and the lead meet
- Heat for 2-5 seconds until the solder melts completely. Sometimes the solder will seems to suddenly “snap” onto the pad. That’s what we want!
- Add a tiny amount of solder to the molten joint. Leave the iron for another 2 seconds after this
- Remove the iron