Soldering introduction

• Adafruit’s video tutorial featuring Collin Cunningham - A tutorial featuring Collin Cunningham, a super charismatic electronics guru.
  
  
• Adafruit’s standard soldering tutorial - A great and thorough video tutorial. An absolute must-read, even if you know how to solder. Make sure to check the “common soldering mistakes” section at the end.
  
  
• Sparkfun’s video soldering tutorial - Another well-made how-to-solder video tutorial.
  
  
• Sparkfun’s standard soldering tutorial - A detailed tutorial made by Sparkfun.
  
  

There are several rules of soldering that everybody, regardless of their skill level, should follow at all times.

• Never inhale the dust and the fumes that can be produced by the soldering iron! These can be hazardous, so please don't inhale them.
• Never touch the tip of the soldering iron! Even if the soldering iron is turned off or completely disconnected from the power source, there is still a possibility that it’s very hot and, therefore, can cause very uncomfortable pain if touched. Always keep it facing away from your hands. If you’re finished with the soldering iron, unplug it from the power source and leave it to cool off for at least five minutes before putting it back in the box.
• Clean the soldering iron! The sponge is your best friend while soldering. Make sure to use it often and clean your soldering iron if you wish to have an easy and simple soldering experience. Carefully hold one part of the sponge with one hand and wipe the tip of the soldering iron on the other part of the sponge to remove the extra solder. Repeat the process until the tip of the iron is nice and clean from the old solder.
• Check your solder joints twice (at least)! Most of the malfunctions in the world of electronics are due to bad solder joints, so regardless if this is your first or 100th soldering project, always make sure to inspect your joints multiple times before proceeding to the next step.
• Keep the soldering iron on the stand when you’re not using it.
• Know how much solder is needed! Make sure to put just enough solder, not too much, and not too little, since both can cause the device to malfunction.
• Don’t leave any residual solder on the board! The solder should only be on the parts where the pins connect to the board. Everything else should be clean. Little pieces of solder all over the board are a big no-no!