FMS Interface

Gameport Interface

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USB R/C Joystick Interface

This circuit is an interface between a radio control transmitter and a computer USB port. It connects between the transmitter trainer jack and a computer USB Type A port. When connected to your computer it automatically sets up as a 4 axis joystick with 6 buttons. The interface reads the PPM data from your transmitter and converts the pulse widths to numbers. It then sends those numbers to the USB engine on the PIC16C745 which looks after the USB communication to the computer and  and will send the values to the computer. The computer will read the data as joystick values. Aileron, Elevator, Rudder, and Throttle control the 4 axis. Channels 5 thru 10 control the Fire Buttons.

Interface Features

• Works with Windows versions that support USB. Windows 95 & NT will not work.
• 4 axis, 6 Fire Buttons
• Will handle 4 to 10 channel transmitters
• Full 8 bit range used for PPM width.
• Data is updated every PPM frame, approximately 50 times a second.
• Auto Power Down after 15 seconds without PPM signal.
• Auto Power Up when PPM signal returns.
• PPM & USB Status indicator.
• No need to remove from USB port when not in use.
• Works with either Futaba, Hitec, JR, or Airtronics. Just change transmitter connector.
• Auto Detects transmitter type and reformats data to be compatible with Windows joystick configuration.
• Very easy to setup.
• Compact size.

        How does it work       

        Schematic Schematic>

        PIC Programming

        Interface - Simulator Compatibility

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