I am using a Micro Maestro 6-Channel USB Servo Controller (Assembled). I want to control some servos but I wondered if there is a way this can be connected with a keypad (for example something like this http://playground.arduino.cc/uploads/Main/keypad_pin_diagram.png
that belongs to Arduino though) or something to accept user input. User manual refers connection with button/switch, potensiometer or LED but if I could use a keypad (for example press 1 to control this servo, 2 for that etc.) I would have a much more easy task.