I would like to measure AC power consumption of devices such as AC/DC charger, AC LED bulb or an electric circuit in the main box of a house.
However, their power consumption are quite low and the cosinus phi is not always usable to compute power consumption while this kind of devices does not have a proper sinus wave form.
How can I measure such consumption? Currently I have AC/AC adapter to have the voltage measurement and a clamp on amperemeter for the current. But I need to perform some calculations to determine the true power.
How can I do that? Is there a dedicated MCU or can I perform this with an oscilloscope?