On Nov 4, 2008, at 4:28 PM, DJ Delorie wrote: > >> Theoretically you could use a doorbell transformer, > > Hmmm... theoretically, I could use the doorbell transformer I already > have, on that panel at least. The other two panels don't already have > that. But I need to get the data off the board and into a PC too. > >> For data USB needs a direct connection and if that's all the R8C >> got, what can you do? > > Actually, it's got a serial port. I'm using a FTDI chip to do the > USB, but it allows me to do remote programming as well as > communication.
you could isolate the FTDI and have it be bus powered. RS-232 lends itself well to opto-isolation. >> Ethernet would be isolated but I don't know what's out there on the >> market to isolate USB. > > There's probably a simple radio link for the UART too. If I knew it > could get out of the metal box and across the house, I'd take the time > to figure it out. It would save me having to put computers near each > box to take measurements, too. > > But I know how the USB circuit works, and it'll be good enough for my > purposes. > > > _______________________________________________ > geda-user mailing list > [email protected] > http://www.seul.org/cgi-bin/mailman/listinfo/geda-user _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
