Peak, Peak to Peak, Average, RMS >> There are many ways to measure AC voltages. The most common is RMS > > What are other methods besides RMS? > > ----- Original Message ----- > From: "Douglas Butler" > To: > Sent: Wednesday, February 27, 2002 10:44 AM > Subject: Re: [pic] Math Question - Measuring AC Voltage > > >> There are many ways to measure AC voltages. The most common is RMS >> which is the usual 220VAC (110VAC USA). RSM voltage is litterally >> "Root Mean Square", so you square your readings, average them over one >> cycle, and take the square root. It would help if you could sync your >> readings to the zero crossings of the power line. >> >> Sherpa Doug >> >> > -----Original Message----- >> > From: Tony Pan [mailto:weidong.pan@VERIZON.NET] >> > Sent: Wednesday, February 27, 2002 9:56 AM >> > To: PICLIST@MITVMA.MIT.EDU >> > Subject: [pic] Math Question - Measuring AC Voltage >> > >> > >> > Hi, >> > >> > I want to use a pic to measure AC line voltage. First, my >> > hardware scales >> > down 200V to 5V and flips the negative duty cycle to positive >> > so that the >> > pic can read the signal. Then the pic reads the voltage every >> > 0.1ms with an >> > adc port. Now I have many almost 100 reads within a duty >> > cycle. No this is a >> > math question: How do I calculate the AC voltage from these reads? >> > >> > Thanks, >> > Tony >> > >> > -- >> > http://www.piclist.com hint: The list server can filter out >> > subtopics (like ads or off topics) for you. See >> > http://www.piclist.com/#topics >> > >> > >> > >> >> -- >> http://www.piclist.com hint: The list server can filter out subtopics >> (like ads or off topics) for you. See http://www.piclist.com/#topics >> >> >> > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics