This project is a great example. [Scott Daniels] takes a look at the other voltage measurement options available to AVR chips used by Arduino.

The ATtiny10 – along with its younger siblings that go by the names ATtiny 4, 5, and 9 – are the smallest microcontrollers Atmel makes. With only 32 bytes of RAM and 1 kB of Flash, ther… ...

Arduino microcontrollers have added Python to the range of compatible programming languages. Others can be used, and not just Arduino's own IDE app.