IDC Connection Timeout - How to Isolate the MAX232AEPE+

[mister_e]

You usually want to cut the power instead of ground...

[Ramius]

Thnaks and maybe I did not explain things correctly? I have a module that produces submarine sounds such as a "Ping". This module runs on 12 volts. If you ground certain pins on the module you can select different sounds using 2N3904 transistors. My issue is with the interfacing the Tx and Rx pins on the PIC to the MAX232.