I have been building various robots over the years and just discovered this site - it is great!
Background: I am building a small tracked bot using geared pager motors and the BabyOrangutan controller board from Pololu. I am using a single 3.7V LiPo battery which is under the recommended 5v, but I have adjusted the board to use the internal 8MHz setting rather than the external 20MHz based on other recommendations and have done this before. I am also using a solar powered charging circuit to top off the battery when there is sufficient light, but it is not currently integrated into this design.
In a nutshell, I have never written a C-program from scratch and while that is bad and I know I need to try, I am seeking a code example of how to read the battery voltage and use the internal 1.1vref to determine the battery state. The board has a few LEDs that I can blink if it reaches a certain level, but that is for later. I read a few posts about ADC on this forum and have looked at the mega168 datasheet, but what I am hoping for is that someone has some actual code that is not pseudo-code, that I could test with this chip/board using the internal reference point preferably if it is standalone as a modular approach seems to work best.
I know that is a lot to ask, but any and all help is appreciated.