Re: Wattmeter

At 03:10 AM 1/21/99 -0700, you wrote:

>Optoisolated wattmeter was in Electronic Design originally.
>3.  The op-amp output of 2 feeds a baragraph display consisting of
>    (5) LM3914 bargraph display driver IC's which feed 50 LEDs in a
>    semicircular configuration.  Additional LEDS and switches are
>4.  Op amp in 2 also feeds a small DVM which read 0.0 to 10.0 which
>    corresponds to 0-10kW)
>6.  Estimated cost of entire system: <$150.

The wattmeter at http://www.microchip-dot-com/10/Appnote/Listing/index.htm,
(PICREF-3 Watt Hour Meter) 30452a.pdf

Would be far better for less, if a bunch of us ganged up to get the PCB's &