ICOM CI-V to RS232 interface using MAX232

This design is in use with all my ICOM rigs since many years, without any problems. The power comes directly from the ICOM rig, one of the AUX connectors on the rear.
Since this connector provides SQL (open, closed) information as well, i have fed this line through the MAX232 to the RS232 CTS signal and can use it in my software.

External view of homebrew interface with 4 connectors to rigs.

Internal view. Not pretty, but it works :-)

Last modified: 06Nov1998, DF4OR