Can you power speakers by stealing voltage?

[JKeefe56]

So, I've started working on an NES portable, nothing too fancy. I promise I've been reading up on how to do this like crazy, but there's something I still don't understand.

Hypothetically, if I had speakers that required 5v to run....would I have to wire it up as part of the whole battery circuit or could I just run a line from the NES mobo (for instance the +5v and Ground lines from the expansion slot)?

The only thing I could think is that the amperage could be wrong, or maybe I'm missing something else?

 

[Mawile]

the batteries supply the amperage needed no matter where they are wired. however you need to put in an audio amp. i used this one. however anyone would work. the speakers themselves are powered through the amp so you only need to power the amp.

 

[Prog]

I'd say you'd be fine stealing power from the 7805 . I'm not sure if you'd be over-drawing.