i must simulate and test
but like a resistor divider:

0 volts ----WWW--| (5 volts) |---WWWW------ 10volts

you can do it with caps in AC voltage


0 volts ---- |||cap|||----| (110volts) |--|||cap|||---- 220volts


must get right values of caps, and use caps for AC voltage (eletrolitic
aren't usefull in AC)
put this divider before resistor and use the same project, you will reduce
voltage with caps, instead a resistor or a transformer, it's very smaller
and more energy efficient




2012/12/5 Markus Gaugusch <mar...@gaugusch.at>

> On Dec 5, Roberto Spadim <robe...@spadim.com.br> wrote:
>
> > 1 watt!!!! that's energy lost in temperature!use a two caps divider and
> a lower resistence
>
> Hi Roberto!
>
> Could you give us an updated schematics? You seem to know what you are
> talking about, while I feel I could be able to understand it when I can
> see it - hopefully :) But at least I would be able to build it ...
> (please also mention values for 230V AC, if you can provide them ...)
>
> thanks! :)
> Markus
>
>
>
> > 2012/12/5 Martin Patzak (GMX) <martin.pat...@gmx.de>
> >       Silvano,
> >
> >       as Google is my friend, it can be Yours too!
> >
> >       Look what I found:
> >
> >       http://ruggedcircuits.com/html/circuit__26.html
>
>
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-- 
Roberto Spadim
Spadim Technology / SPAEmpresarial
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