Gene, I know you wanted to derive power from an RS232 port, but why not do a port steal from a USB port.
Plenty of ma at 5vdc regulated. Also, there are lots of TTL to USB and RS232 converters already assembled on Ebay - very cheap. Dave On 12/27/2012 12:01 AM, Gene Heskett wrote: > On Wednesday 26 December 2012 23:50:52 andy pugh did opine: > > >> On 26 December 2012 22:45, Gene Heskett<ghesk...@wdtv.com> wrote: >> >>> I am out of input pins on the cnc4pc C1G. >>> >> How about using the serial port status pins? >> http://www.linuxcnc.org/docs/html/man/man9/serport.9.html >> > Hadn't even crossed my mind Andy, thanks. From the manpage, looks like that > could give me 3 more .in pins. Next of course, that would bypass the opto > isolation. I wonder if the sparkfun thing could be like an old serial > mouse, which was powered by the logic levels of the port? Its marked for > ground& 5 volt supplies, but it came with zero docs, as in nada, zip, > none. Time to do some research on the chip makers site I guess. The > sparkfun site itself is no help. > > Cheers, Gene > ------------------------------------------------------------------------------ Master HTML5, CSS3, ASP.NET, MVC, AJAX, Knockout.js, Web API and much more. Get web development skills now with LearnDevNow - 350+ hours of step-by-step video tutorials by Microsoft MVPs and experts. SALE $99.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122812 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
