Digimode PC to TRX galvanic isolated Interface

This interface is galvanic isolation of the transceiver from PC computer. Audio input and output paths are separated by transformers; optocouplers serve to isolate the digital paths, PTT and CW KEY. It was built for Icom IC-718 but can be used for any other radio. Interface support PTT keying over RS232 RTS (pin 7) and…