I'm making a complete gaming setup for a tetraplegic based around the XAC. For all digital inputs (X, Y, A, B etc.) I'm simply using standard arcade push buttons with microswitches connected through a mono mini jack cable. Easy peasy!
However, I'm having trouble getting the analog inputs (X1, X2, RT, LT) of the XAC to work. I would like to get the exact same functionallity as the Left and Right triggers (LT, RT) on the Xbox joypad/controller (e.g. for controlling speed or jumping height in games). To achieve this I have purchased two analog arcade buttons (link) with internal 'potentiometers' that goes from 10 kΩ to 0Ω when being pressed. The problem is that it does not work when I connect them to the XAC... According to the generel XAC information, it should be possible to connect analog inputs to (X1, X2, RT, LT) using a stereo mini jack cable. However, I have not found anyone who has actually taken advantage of this feature, nor seen any devices that has implemented this feature.
So my questions are: what specifications should be fulfilled for an analog input to be accepted by the XAC? How should it be wired to the stereo mini jack cable (tip, ring, sleeve)?
Thanks for your answer :o)