here I'm just wondering where he voltage gets dropped from 12v to 5v on this board?

There is nothing on the bottom of the board.

 

It's that regulator IC in the upper right corner with the 117 at the end of the number.

 

It's that regulator IC in the upper right corner with the 117 at the end of the number.

The AMS 1117?

Thanks

 

The AMS 1117?

Thanks

Yes.