They have a lot of models (not accounting for spin-offs done by other folks, which some are great - long live open hardware), I think there are some more parameters for choosing an arduino model:
- Does size matters? 
- Does price matters?
- 8 buttons + 1 potentiometer (in a pedal). Extendability up to 12. 
  - do you wanna multiplex[1], or simple coding?

 Maybe if you really want a lot of inputs, Duemillianuove will not suffice, and maybe Mega is the way to go, but its more expensive and bigger. 

[1] http://www.arduino.cc/playground/Learning/4051

On Sun, Apr 10, 2011 at 2:14 PM, Pierre Massat <pimassat@gmail.com> wrote:
Hi all,
I sorry to start yet another thread about arduino, but i'm too lazy to search the archives and i suppose that they are upgrading the different models frequently.
I have been using a hacked gamepad-turned-stompbox to control my live patches, and right now i feel that it's time to build something else that would suit my needs more closely.
I have to choose between a decent gamepad that i could hack and a arduino board. Only, i don't know anything about arduino. So it'd be nice if a list member could help me a little bit.
Here's what i have right now :
- 8 buttons + 1 potentiometer (in a pedal).
I'd like to have more buttons (I could have 12 using the game controller, can i have more with a arduino board?). And it'd be nice if could have more "analog" pots (i could have up to 4 using the gamepad, but they're hard to solder...).
Also, i'd like to know the "resolution" of the analog inputs of a arduino board. Is it higher than that of a gamepad? That'd be cool because i could have a smoother control over certain values in my patch.

And finally, what do i need to connect the arduino board to Pd? Is it the HID object or something different?

Any help welcome.

Cheers!

Pierre

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