WKKO
WKKO
Why do I have this problem when testing the code Is it because of the NITK version(0.4.0) 
power
I'm sorry to bother you again, but may I ask why the power here is in such a waveform. In an AC circuit, power should not be directly voltage times...
Sorry to bother you, I encountered this problem while running your code. Do you know how to solve the problem? 