Well after about 3 months of development I have finally completed my R/C Transmitter to USB Joystick interface.
I am quite happy with the end product.
It will work with Futaba, Jr, or Airtronics. If you want to change radio brands just change the transmitter connector. The interface can handle the signal from various brands and reconfigure the data to always be the same format and will match the Windows game controller functions.
The unit has auto Power ON/OFF, so no need to ever remove the interface from the computer. When your done flying just shut off the transmitter and in about 15 seconds the interface disconnects from usb and then powers off. Turn your transmitter on and it reconnects to the usb bus and in about 3 seconds your joystick is back in action.
I also added a Status LED. It is ON when the interface is an active usb device and FLASHES when there is no PPM signal from the tranmitter.
It provides the 4 axes and 6 buttons so it will work right up to a 10 channel. If you have less than 10 channels, that's ok. Only channels 5 and up will act as buttons and the remaining unused buttons will be inactive. So if you have for example a 7 channel transmitter then you will have 3 buttons that operate and 3 buttons that are inactive.
The cost is $45 US plus shipping and handling for a fully assembled and tested interface.
In the picture with the circuit board most of the components are on the other side of the pcb.
Happy Flying.
Dennis
dkoroluk@mts.net