Gameport-Interface for flight simulators
The transmitter's PPM-signal is decoded by the ATtiny 15 processor,
4 different voltages are assigned to the slider positions by MOSFETs and sent to
the gameport. Depending on the processor's software the transmitter reacts like
4-axis joystick with 1 fire button (pressed at full amplitude of the 3rd channel or
beyond the 0-position of the 5th channel). The microcontroller digitizes the
transmitter signal with a 250 kHz sample rate and assigns a number between 0 and
250 to any of the 4 RC-channels. After the voltage-conversion these numbers are
sent to the gameport.
This interface is instantly usable without driver installation and has a 1,6m
cable. It works with nearly all transmitters equipped with a pupil plug. For
more information about suited transmitters jump to:
The Gameport Interface works with most R/C simulators which can be controlled by
a common game joystick under DOS or Windows.
The Gameport Interface is available as
ready-to-run smd device or breadboard assembly set with all parts.
In addition, the ATtiny15 microcontroller in DIL package for the
following schematic is available:
click to enlarge, SUBD-plug viewed from plugging
assembly on breadboard
Windows installation, hints
digital Gameport Interface
digital R/C Gameport Interface for 8 axis, with JR connector
The digital R/C Gameport Interface uses the same technology
like modern joystick devices:
Up to 8 stick positions are received and decoded by a
processor again. However, the information are sent digitally to the gameport
though 4 wires originally designed for fire buttons of analog joysticks. In
consequence, more than 4 axis (up to 8) are transmitted to PC.
The disadvantage of this transmission method is the need for
a Windows device driver, that processes the Gameport Interface information and
provides a special joystick with 8 axis. The driver is available at
http://www.ripmax.com/home/drivers.htm and works with Win95, Win98, Win ME.
This R/C adaptor originates completely from Dipl. Ing. W. Wiedmann (website
rcsim.de). If you have any questions about functionality, installtion,
availability, .. please email directly to
W.Wiedmann@t-online.de . This adaptor
can also be ordered in the