On Sat, 26 Nov 2011 12:08:41 -0800 "Tom Van Baak" <t...@leapsecond.com> wrote:
> > Come on, folks. never hook anything directly to the power line. The > > source is just too stiff. Use an opto. I used fiber optic isolation with > > my big DC power supply. > > Don > > I used to agree, until actually tried it myself. Now this is how > I do my picPET 60 Hz data logging: > > Simple 60 Hz AC Mains Cycle Detector > http://leapsecond.com/pages/ac-detect/ Yes, there is nothing that speaks against connecting something directly to mains if you either ensure that the circuit is properly isolated or that the current is limited. But, i recomend to use two resistors in series to ensure that even if one fails, that the other prevents a possibly lethal hazard. Attila Kinali -- Why does it take years to find the answers to the questions one should have asked long ago? _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.