XBOX 360 Controller with built-in Arduino ?

Projects General Guidance
1

I wanted to stay in game without controller going to sleep and simplest I could think of was to have Nano press a button every now and then. Nano was outside and 5V powered because 328P won't run at 16MHz from 2.5V that my wireless controller had (2 cells 1.25V each).

It would be interesting if all toggles and switches were programmable, ideally, all of them would be inputs and outputs so it could be used to either automate the controller and also use controller for other applications than XBOX by Arduino sensing the toggles.

2

When 2 cells mean 3V (1.5V each), you can use an 3.3V type Arduino (Mini...), which operates down to 2.8V.

Otherwise a bunch of electronics is required to translate all signals between 2.5V (XBOX) and 3.3 or 5V (Arduino).

3

I am considering barebone ATMEGA328P-PU running with internal 8MHz oscillator.