Reviving this topic because I have become interested in an input display. How much would I be looking at moneywise?
I don't recall the specifics right now, but I think they were somewhere in the range of $40-$50, plus shipping. I was able to get it lower by buying 8x of all the parts at once when we had a lot of people sign up. Maybe someone actually makes one of these commercially by now?
The controller input just doesn't register anymore, with any game that's being played. I never changed anything to do with the program. I'm not sure how often (if at all) the program updates...
I barely remember the specifics of how this worked...
Does your controller still work when plugged through the device? If not, the wires have probably become detached and you would need to take the whole thing apart and reconnect them.
I think it registers as a serial device (e.g. "COM1"), are you seeing that part show up still when you plug it in? If not, you might need to reload the firmware program onto the device. Yours was the first cable I made and I'm not sure if I drilled a small pinhole for access to the reset button -- I know I did for everyone else's.
If your controller still works and the device still registers as a serial device, it is possible that one wire has disconnected from the circuit board but not from the rest of the controller wire, you'd probably need to break the thing open to find out.
Easiest fix is if it is just a software thing. I photos saved of what the internals look like, so you at least have a record of what is in there if you need to pop it open. The case is glued shut.