My project:
I want to build a joystick that controls the mouse pointer and is able to connect by usb or bluetooth to an Android device or pc and has also a battery build in. If a USB cable is plugged in, the battery should be charged.
Question:
Which board would you recommend to use for it?
Is an Arduino Leonardo the best solution or is there something better than that?
What do I have to consider with the battery, do I need some kind of charging electronics for it?
With which components would you implement this?