From Hackaday:
After [Pyrofer] built a quadcopter, he purchased a cheap 6-channel transmitter made in China. Unfortunately, that transmitter was terrible so he took an old PS2 controller and built his own.
For his build, [Pyrofer] broke out the analog sticks and wired them to an AVR housed in the handle of the controller. The AVR sent commands to a 2.4 GHz radio transmitter powered by a small LiPo battery. With the addition of a few tact switches behind the shoulder buttons of the controller, [Pyrofer] has four axes of control with a few buttons for changing modes on his quadcopter.
This build really doesn’t hold a candle to some of the awesome DIY RC transmitters we’ve seen, but we’ve got to give [Pyrofer] credit for coming up with a very simple and easy build. Just about everyone has a PS2 or XBox controller lying around, and with a few extra hardware bits it’s easy to bodge up a decent remote control.
[Pyrofer] used a project called Funkenschlag to generate PPM signals, so if you feel the need to replicate this project send it in when you’re done.
Comment by Hans Cappelle on July 17, 2012 at 1:06am Nice project. Is there a reason most of these joystick/controller mods are done for quads?

I think it's largely because quads have brought a whole bunch of "young", hacker-ish people into the field, who are open to trying new things, and have the skills to do so. Bring this contraption to your local AMA-sanctioned club, and the old guys will be ranting about it being unsafe for several days non-stop.
However, one problem I see with this is simply that the throttle stick self-centers. Not sure how you use that properly.
Comment by Hans Cappelle on July 20, 2012 at 2:35am You're probably right about the bunch of young, hacker-ish people :).
Throttle is indeed an issue on some controller alternatives. Not sure if it's any good idea but that could be solved by software also I think. If the software remembers the highest (for everything above center) and lowest (for everything below center) stick position than you could control throttle that way. You won't be able to use center stick position as throttle input anymore though. Probably needs some getting used to also.
Comment by msev on July 28, 2012 at 10:28am Btw could such a transmitter with added three-way switches be adapted for use with flight mode switching in Arduplane? Would you help me out if I were to attempt to make such a transmitter?
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