Soldering to a PC board can be tricky: Too much heat can make the copper trace lift right off the board substrate. Use a soldering pencil rated at 15-25 watts, no more. (Watch the video; story ...

To make the connection, the solder must be molten so that it can wet the metal surfaces that need to be connected. When ...

Whether you’re a book-learned engineer looking to finally get your hands on building circuits, or a maker, hobbyist, or student, these instructional videos get you started. The basic metallurgy of ...