In a world of precision-engineered digital cameras, the colorfully analog Blackbird fly is a strange bird—one that took almost 15 years to hatch.

As proud as I am that my son is tech-savvy like his daddy, it's equally important to me that he have analog skills: the ability to bait a hook, clean a gutter.

An analog signal is composed of four basic components: DC and AC magnitudes, frequency, and phase.