DJ Delorie wrote: >> Be careful. If for some reason the USB ground comes off and that's the >> only ground it'll be anyones guess where any capacitively coupled 60Hz >> will go. If it picks the data lines ... bzzzt ... poof. At least there >> should be some kind of bleeder. > > Thanks for the warning. > >> If by circuit panel box you mean the breaker box (or a sub-panel) >> legally you aren't supposed to do that AFAIK. > > I suspect you're right, but then again, I don't plan on these being > *that* permanent. Ideally, they'd run off a transformer in the box > and use radio or fiber to get the data out, but radio won't pass > through a metal box that easily. >
Theoretically you could use a doorbell transformer, some come in breaker-panel compliant sizes. For data USB needs a direct connection and if that's all the R8C got, what can you do? Ethernet would be isolated but I don't know what's out there on the market to isolate USB. I think WiQuest had that but AFAIK they are gone. Some robotics places might have modules. -- Regards, Joerg http://www.analogconsultants.com/ _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
