3) Using an Arduino Nano.Number 3 seems like I'm wasting a lot of resources too (feels like "throwing an Arduino away").Is there any other alternative?
Thanks for the answer John. So, If I understood correctly, the USB/Serial functionality is not native into 328?
2) I've seen a lot of material about uploading sketches to ATtiny45/85, using the Arduino as an ISP. I think this is incredible, specially because the ATtiny's are very cheap.
keeping the serial-over-USB functionality.
with regular USB
it seems to make sense to stick with the standard form factor ... and no compromises or programming issues
looking for an alternative to make my projects permanent after I prototype it on the Arduino.