If your goal is to save on electricity, you must first measure the ac current flowing through your appliances. The formula for power is the product of the ac line voltage and the measured current.
[Renaud] built a AC power meter from scratch. While commercial power meters like the Kill A Watt are available [Renaud’s] build gives an interesting insight into the methods used. At the heart of ...
Suited for highly accurate ac power measurements, the series 66200 digital power meters uses internal 16-bit ADCs to provide precision sampling at rates to 240 kHz. Units employ a dual-shunt design ...
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