Simple digital AC wattmeter:
04/14/97 Electronic Design - Ideas for Design /
To make useful measurements of “real” power
consumption, wattmeters must be accurate despite
large reactive and dc components in the current
drawn by the monitored load. Moreover, power
consumption from multiple ac phases (two in the
case of a typical. . .
11/03/97 Electronic Design - Ideas for Design /
An inexpensive switching regulator can provide
all the active circuitry needed to implement a
dc wattmeter and allow the power dissipated in a
resistive load, RX, to be displayed on an analog
panel meter. The wattmeter’s operation. . .