antaeus:
Hi JMC1965,Thank You for the informations.
I think to use an external 3.3 volt regulator too ( I have some LT1584 ).
For audio output I am going to use an OPA like LM358 that works fine
with low voltage.
Maybe a good choice with AA batteries.
Regards
Antaeus
Hi,
LM358 is quite a nice option. If you are working on it then you should have a look at [LM358 Pinout. It will help you in understanding it better.
Thanks.