The key part of any electronic device is the power supply. Any instability or malfunction of the power supply part causes the device to stop working or demonstrate weird behavior. In this article/video, I introduced an AC-to-DC flyback Switching power supply that converts 85V-260VAC to...
Measuring the AC current (220V mains RMS current) is not as simple as measuring the DC current. In the DC current measurement, you can simply hook the oscilloscope probe to the shunt resistor and calculate the voltage difference and the current, however, that is not the case with the mains line...