Re: Input power measurement

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Barton B. Anderson by way of Terry Fritz <teslalist-at-qwest-dot-net>" <classictesla-at-netzero-dot-com>

Hi All,

If anyone has though about simply building their own true (non-reactive) 
power meter, there is a schematic of a 1KW Power Meter at my web site. 
Something I scanned out of a book a long time ago. I have never built it.
http://www.classictesla-dot-com/download/nrpmeter.jpg

Take care,
Bart

Tesla list wrote:

>Original poster: "Stephen Conner by way of Terry Fritz 
><teslalist-at-qwest-dot-net>" <steve-at-scopeboy-dot-com>
>
>Hi guys,
>
>As part of my research at university I designed a true RMS wattmeter that 
>uses your computer soundcard as an input device. The only hardware you 
>need is a current transformer, a voltage transformer, a couple of 
>trimpots, a mini-jack lead, and a good deal of courage. The voltage signal 
>gets fed in the left channel, the current goes in the right, and a piece 
>of software I wrote works out the watts, VA, power factor etc. I haven't 
>dared to use my prototype with a Tesla coil because I'm worried about 
>getting RF into the computer and wrecking it. However if anyone is 
>interested I could write up some plans and make the software available for 
>download.
>
>Steve C.
>
>
>
>
>