hi! im planning to build a power factor meter using the phase difference of the zero crossing of the voltage and the zero crossing of the the current. I think I will be using a 89c51 microcontroller. My voltage zero crossing detector works fine as I can see it in the oscilloscope, (60hz in 16.6666ms) but I was not able to have a satisfying result with my current zero crossing detector. By the way, Im trying to measure a load at a maximum power of 25KW.
Im getting my signal from a current transformer(150:5) and fed it to a schottky rectifier and amplify the signal by means of an LM324 op amp.
Anyone has a better idea?
Your help will be much appreciated! thanks in advance!
Im getting my signal from a current transformer(150:5) and fed it to a schottky rectifier and amplify the signal by means of an LM324 op amp.
Anyone has a better idea?
Your help will be much appreciated! thanks in advance!