FTDI Chip USB Serial Adapter
The FTDI Chip USB Serial Adapter ads an RS-232 serial port to any PC. Since many soaring instruments need to connect to a PC for data transfer (waypoints, airspace, flight logs, etc.), and new PCs don't have serial ports, this little device is a great accessory. It plugs into a USB port on the PC. A DB-9m connector is available for connection to your soaring devices.

Cable Length: 10 feet (3 m)

Drivers are available for the operating systems below:

Windows 8
Windows 7 (32-bit and 64-bit versions)
Windows Vista (32-bit and 64-bit versions)
Windows XP
Windows 2000
Windows 98
Windows CE
Mac OX X

Tested and Works Great With:

Cambridge GPS-NAV
Cambridge 302
Compaq Aero 1500 PDA
EW Model D Flight Recorder
Garrecht Volkslogger
HP hx4700 PDA
ILEC SN10
LX Navigation Colibri, LX20, LX4000, LX5000, LX7000, LX7007

Drivers
It is very important that you download and install the drivers on your PC. The cable will not work without the proper drivers. Download the drivers using the link below. Look for the "Setup Executable" link in the "Comments" column of the "Windows" row.
http://www.ftdichip.com/Drivers/VCP.htm

A direct download link to the .zip file containing the executable file isavailalbe here:
https://www.ftdichip.com/Drivers/CDM/CDM21228_Setup.zip

Tips

First you must install the drivers for the USB to serial adapter cable on your PC by running the executable file available at:https://www.ftdichip.com/Drivers/CDM/CDM21228_Setup.zip.
Download the .zip file to your computer, double-click it to open it and see the file inside. Then double-click on theCDM21228_Setup.exe file that is the only file inside the zip file. It is an executable install program that automatically installs the necessary drivers onto your PC in the correct locations.
After you have installed the drivers, connect the USB to serial adapter cable to your PC's USB port.
Use the Windows Device Manager to figure out which comm port is used by the USB to serial adapter cable. In the screen capture below it is listed as the "USB Serial Port (COM 13)". The important information is that the cable is using comm port 13. It is likely to use a different port on your computer. Set your soaring on the PC to use the comm port shown in the Device Manager.