The interface has been successfully tested with Win-Test and DXLog under Windows 10 and Windows 7 (both 32-bit and 64-bit), and with N1MM under Windows 10. It should also work with any other logging program that (as per the de facto standard) uses the pins/lines RTS and DTR to control the transmitter.

The FTDI drivers are easily available and often already present in the OS. The interface will present itself to the user as a new COM port. In Device Manager go to this new COM port Properties->Port Settings->Advanced. Then in the Miscellaneous Options section (bottom right) uncheck Serial Enumerator and check Disable Modem Ctrl at Startup. That will prevent the interface from keying/unkeying the radio for a moment as it boots up.

The outputs are (opto)isolated from the computer. The enclosure is grounded on the radio side only. The enclosure is from Aliexpress and measures 80x50x20 mm.

Please also read the full article:

https://yu2zz.com/2024/01/13/usb-cw-keying-interface/