Standalone 8MHz Atmega328 - Measure input voltage using internal 1.1v ref.

Projects Programming
1

Hi,

I am trying to find an example code that show how to monitor a battery voltage using the internal 1.1v ref. I have a standalone Atmega328-AU on a PCB running at 8MHz using a 3.7v lipo battery.
Since the batter voltage is changing (from 4.2v fully charged, to 2.8v "empty") I would like to monitor this voltage and to get a series of five LED to light up according to the battery voltage.

Any tips or examples on how to do this?

Thanks

2

Look here or here or search for "arduino internal voltmeter" on the interweb :slight_smile: