Recent content by henriquevpp

  1. henriquevpp

    Why this Simple Watt Meter for a 220 Volt Circuit works?

    Hello guys! I'm just a begginer student. I found this circuit of a wattmeter that works only with resistors. Can someone explain to me how the 33k resistor give a voltage of 1 mV to 1 Watt? I did not understand why these resistor values has been chosen and why the it measures only in the 33k...