--===============1492263321== Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by pch.mit.edu id m9HN1jph021786 =20 Sorry and thank you. =20 =20 The problem was solved. =20 I was stupid. I just made a resistor divider and a comparator with some= hysteresis this afternoon, it's working fine. > To: piclist@mit.edu> From: lists@connectionbrazil.com> Subject: Re: [EE= ]: tradeoffs and confusions on a under-voltage (brown-out) protection cir= cuit.> Date: Fri, 17 Oct 2008 17:39:44 -0300> > gardenyu wrote:> > > I ca= nnot use the SMPS rectified input as well. Since the rectified AC is> > f= iltered by a small cap at the SMPS input, with about 150V from min to> > = max. > > Why can't you use this? It seems to me that the peak voltage has= a> reasonably defined relationship with the voltage you want to measure.= > > Gerhard> > -- > http://www.piclist.com PIC/SX FAQ & list archive> Vie= w/change your membership options at> http://mailman.mit.edu/mailman/listi= nfo/piclist _________________________________________________________________ =CC=B8=BB=B0=BF=DD=D4=EF=CE=DE=CE=B6=A3=BF=C8=C3MSN=C4=A7=B7=A8=CA=E9=C0=B4= =B5=E3=D7=BA=C4=FA=B5=C4MSN=A3=A1 http://im.live.cn/emoticons/?ID=3D6 --===============1492263321== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Disposition: inline Content-Transfer-Encoding: 7bit -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --===============1492263321==--