Michael Rigby-Jones ha scritto:
> Looking back through the posts in this topic I think there may be a
> fundamental disconnect between Dwaynes measurement technique and what
> Dario is hoping to achieve.  Dwayne is rectifying and smoothing the AC,
> so a box filter could be useful to get the mean DC value and reject any
> ripple.  

This makes sense definitely :) !



> I may be wrong but I get the impression that Dario is effectively half
> wave rectifying the AC waveform by clipping the negative side to ground
> with a diode since there was some discussion on the dangers of not using
> the PICs protection diodes for this.  Since that will give one half
> cycle of positive input followed by one half cycle of 0 volts it's not
> surprising his box filter isn't giving zero (would be Vpeak/PI I
> think?).  A schematic would certainly reduce confusion here.


And this too.
I'll try to make up the schematic, but it is really that simple:

220V -> transformer -> one leg to GND, other to partitor -> partitor 
output to PIC || diode.

-- 

Ciao, Dario
--
Cyberdyne
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