Planning a delta throttle - capabilities

[TechKnight]

I'm starting to plan out a delta throttle build, but I'm having a little trouble figuring out what the possible capabilities are. Obviously it supports at least three axes. The build instructions show either three buttons or two buttons and a hat. The Arduino joystick library supports much more than that, so it seems the limiting factor is the board. This is where I'm running into trouble. This will be my first electronics project, so I want to be sure I'm understanding the documentation I'm reading. It looks like the board has 18 input pins, of which nine support analog input. To me, this sounds like it could support three axes and up to six buttons, is that right?

I ran into one joystick build that used a separate I/O board with the Pro Micro so the joystick build could support up to 6 axes and 32 buttons. Is there any reason this wouldn't work for a delta throttle?

[aniron]

Nope, and nothing that says you have to use the Pro Micro in the first place either.

I intend to use an Arduino Mega2560 clone.
56 digital I/O and 16 analogs should last a while.

[TechKnight]

Thanks! Actually, after further research, I think I was mistaken about how the wiring is supposed to work. It seems each input only requires one pin, not two like I had thought. That means the Pro Micro should have more than enough pins to work with.

[aniron]

Yep, one I/O pin and common ground.
If that's not enough, you can set up a diode matrix to extend the pins to more buttons.
That gives you A*B buttons using A+B pins.