Breadboards and perfboards make is easy to build all kinds of electronics, but they're not exactly easy to understand at a glance. Thankfully, Adafruit has a video that walks you through the basics.

As I mentioned in my recent columns on the topic of adding pull-up or pull-down resistors to the inputs of unused or partially used logic gates and functions (see Part 1, Part 2, and Part 3), I was ...