I was surfing the postings on AVRfreaks site and came across an interesting topic where someone asked how and if they could measure the battery voltage that was powering their AVR chip. There were the normal suggestions of using a voltage divider across the battery and changing the A/D reference to…

Measurement of Bandgap voltage

Coding_Badly January 8, 2011, 9:26pm 2

Nice! This is exactly what I need!

So is there a way to allow a sketch to read mux channel 14?

Yes. I'll get back to you this evening with how to do it and what my testing reveals.

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