Arduino Measures Remaining Battery Power With Zero Components, No I/O Pin

[Trent M. Wyatt]’s CPUVolt library provides a fast way to measure voltage using no external components, and no I/O pin. It only applies to certain microcontrollers, but he provides example Arduino code showing how handy this can be for battery-powered projects.


This is a companion discussion topic for the original entry at https://hackaday.com/2023/12/21/arduino-measures-remaining-battery-power-with-zero-components-no-i-o-pin/