For regular readers of this blog, that would be like defining USB for a general tech audience. Other articles by this author expect the reader to also know terms like I2C and SPI.
Most readers of this blog probably still can't define USB beyond "what you get when you stick this kind of cable into that kind of hole in your computer"
Takes an analog signal from something like light or sound and convert it into a digital signal.
Acronyms introduced in an article should be spelled out at least once please.