Re: [avr-chat] AVR on 1 AA bat with just 1 L and 1 C

[hanzl]

> > I thought either predetermined mark/space ratio could do (with known
> > power consumption) or the AVR could somehow use the A/D circuitry to
> > deduce the Vcc and act accordingly (thought I am not sure this could
> > be done without more external parts).
> 
> If it has an internal band gap reference like the ATmegas, then just
> measure this and you can calculate from its known value the reference
> voltage ( = Vcc ), no further external parts needed.

Yes, ATtiny15L does have the band gap reference, so it should be
possible to determine Vcc.

Thanks,

Vaclav