Solder is the shiny silver-gray metal seen in tiny blobs on almost all circuit boards (see Figure 21-1). Soldering is the process of melting the solder onto the desired joints to connect the joint materials together both physically and electrically.
Figure 21.1. Circuit board featuring numerous solder points
At first, soldering may seem messy, complicated, or even dangerous. The perceived permanency may bother some beginners. But, after a little practice, it turns out that soldering is easy and effective!
Soldering requires solder wire, flux, a soldering iron, a soldering-iron stand, a tool for removing excess solder, ...