Good points Lyle and Alan... However generally, it would be nice ot have an opto-coupled I2C interface that runs at 400kbps in almost any-case. Finding a part for it is the challenge. Perhaps an opto part that has level translation in/out with no external components. I want to plug my WB6DHW or XTALL board into microcontroller dev boards or different PC's that are running the likes of Rocky etc. and not have ground loops. I2C Opto-isolation is a guarantee there won't be ground-loops.
--- In [email protected], "Alan" <[EMAIL PROTECTED]> wrote: > > > ----- Original Message ----- > From: "drmail377" > > > > However, I would think a better parallel port interface would employ > > opto-isolators. Opto-isolators will prevent a potential source of > > ground loops. > > All I do is break the loop. The I2C connections go from the interface but > the return goes through the audio cable ground. > Then connecting the LPT makes no difference to my waterfall. > > 73 Alan G4ZFQ >
