A thought has just crossed my mind, not sure if the idea is valid or not. The idea is to re-purpose (parts of a) PLC network adapter. At the very least they can be a source of line voltage rated parts I'd think.
But the low frequency characteristics make me wonder in this context, as PLC is in the HF range? Wilko > On 23 Jan 2022, at 03:33, glen english LIST <[email protected]> wrote: > > hear hear.stick to galvanic isolation or better - > > On MF/SW broadcast sites for this we used optically coupled sensors. > > The mains supply is simply intensity modulating an opto isolator ( a pair > actually for both sides of the waveform) .. They can with stand a fair degree > of overload and its likely something else will flashover first with slots in > the PCB. The opto was used in a linear mode. lots of effective R in the > emitter . didnt bother with saturation prevention diode B-C because the > recovery was (still) fast compared to the 50/60Hz. > > -glen. > >> On 23/01/2022 6:15 am, willl will wrote: >>> On 1/21/22 7:00 PM, Robert LaJeunesse wrote: >>> Stick with the transformer. The use of a capacitive divider is predicated >> on the line waveform always being a sine wave. Dream on! All it takes is >> one good spike down the line, maybe only 20-30V amplitude, and your >> capacitive divider passes it right on to that ADC that has a much lower >> (3.3V?) limit. Guess what goes poof? > _______________________________________________ > time-nuts mailing list -- [email protected] -- To unsubscribe send an > email to [email protected] > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
