This Arduino application emulates a USB joystick and gets its values from a PPM signal that comes from a remote controll (in my case a Walkera 2401 of a modell helicopter from Conrad).
It makes use of the V-USB library, so now additional driver is required. It simply appears as a HID (Human Interface Device).
The remote controll has a kind of S-VHS connector at the backside where the adapter cable goes in. The 3.5 mm mono plug connects to the Arduino, signal line to D8 and ground to ground.
The V-USB library has been modified to compile with the Arduino IDE 0018 (datatype "byte" was changed to "uchar").

connection scheme: